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  • 1.
    Andersson, Johan
    et al.
    Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
    Hallgren, Einar
    Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
    Fartygstrafik genom naturreservat: Salvorev: Östersjöns genväg2017Independent thesis Basic level (university diploma), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Den här studien undersöker hur utsläppen av CO2 samt NOx skulle påverkas av att man tog en längre rutt runt ett Natura 2000 område mellan Gotska sandön och Fårö norr om Gotland i Östersjön. Detta för att undvika att köra i ett natura 2000 området och på så sett minska sjöfartens påverkan på djurlivet där. Med hjälp av AIS data har information tagits fram om hur många fartyg som använder rutten genom natura 2000 området. En sammanställning av vilka typer av fartyg samt dess maskineri har också tagits fram med hjälp av detta. Som ligger till grund för uträkningarna för CO2 samt NOx utsläppen. Studien visar på att CO2 utsläppen kan öka med upp till 4,72 ton genom att köra en längre rutt runt området, även NOx utsläppen ökar, med upp till 0,13ton.

  • 2.
    Blom, Jonas
    Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
    Utredning om modifikation av skrubberanläggningen på Peter Pan2019Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    AbstractSince MARPOL Annex VI took force in 1997, the limits ​​with in SECA (Sulphur EmissionControl Areas) have been stricter several times. This contributed to the vessel Peter Pan,owned by TT-Line AB, installed a scrubber in 2016. A scrubber enables the use of fuels with ahigh sulphur content and still meet the actual requirements. Since the scrubber was installed, ithas resulted in an increased workload for the crew on board. The goal of this study was toclarify if there are components in the system that cause frequent operational disturbances and ifthese can be replaced in order to reduce maintenance. To find out this a field study was doneon board the ship. This resulted in several components being observed and examined moreextensively. The compilation of the data collected during the field study showed that there areparts of the system that can be modified to extend the operating intervals. The conclusion washowever that the survey was going on for a too short period to give accurate results.

  • 3.
    Boström, Magnus
    Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
    Simulating Advanced Arctic Operations - Lessons Learned2014In: 18th International Navigation Simulator Lecturers' Conference / [ed] Sam Teel, Massachusetts Maritime Academy, USA, 2014Conference paper (Other academic)
    Abstract [en]

    The use of simulators is widely used for preparing someone, be it a person or organization, for an upcoming task. There are several reasons for this. Many endeavours are costly, and the gain from a real life experience might not justify its costs. Another reason might be that the task involves hazardous elements, with potential to harm people or the environment. There is also the possibility that the experience sought occurs so infrequently, that one is unlikely to experience it under real conditions. In all of these situations, a simulated training experience can be equally good, or even better, compared to real on-the-job training.

     This paper gives an account of a course in advanced arctic operations, where the simulator was used in preparation for operations in ice. The preparations and execution of the training itself are explained, accompanied by the views of the course instructors about the lessons learned. The result indicates that one of the key components of successful training is to avoid having too detailed exercises, and rather to focus on the fundamental principles of the upcoming activity. In combination with the important debriefing where more specific aspects of the operation can be discussed, a broad training leaves the participant well equipped to handle real life challenges as they appear in the field.

  • 4.
    Boström, Magnus
    et al.
    Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
    Österman, Cecilia
    Linnaeus University, Faculty of Technology, Kalmar Maritime Academy. IVL Swedish Environmental Research Institute.
    Improving operational safety during icebreaker operations2017In: WMU Journal of Maritime Affairs (JoMA), ISSN 1651-436X, E-ISSN 1654-1642, Vol. 16, no 1, p. 73-88Article in journal (Refereed)
    Abstract [en]

    The study presented in this paper aims at investigating what safety measures that can be taken to improve the operational safety during icebreaker operations in the Baltic Sea. During icebreaker operations, the icebreaker and the assisted vessel operate in close proximity to each other, a distance which can be even smaller if weather and ice conditions are severe. This poses a severe threat to the operation, since the extremely short distance between the vessels leaves no room for error. The results, which are based on data collected through individual interviews and questionnaires, indicate several possible improvements. Firstly, on a regulatory level, the introduction of an ice navigation certificate for deck officers would set a minimal level of formal competency. Secondly, on a knowledge level, more ice navigation training and better language skills work in favour for the safety. Thirdly, on a technical level, having an electronic chart with target tracking capability increases the efficiency and safety of the passage through ice. In addition to these results, this study shows a need to further research the communication and language situation during icebreaker operations.

  • 5.
    Brown, Alexander
    et al.
    Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
    Peregonchuk, Alexey
    Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
    Framtidens LNG-tankfartyg: En studie om framdriftsanläggningar för LNG-tankfartyg2014Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This study consisted of analysing the current situation on the market for propulsion systems for LNG-carriers. The purpose of the study was to create a relevant picture of what the situation looks like today and through interviews try to predict how the situation might come to change.

    By using already existing literature the authors reviewed the situation on the market as it is today and formed relevant questions. After the questions had been formed the authors contacted several companies associated with the LNG-carrier market. Interviews with these companies were carried out and it is through these interviews possible to analyse how the situation might come to change.

    The study has shown that there is one system that dominates the market for LNG-carrier propulsion, DFDE. There is however a new system, with dual-fuel two stroke engines that is expected to take over a part of the market in the near future. Other propulsion systems such as steam propulsion plant and a system with a gas turbine exist on the market but the interest in these systems is limited.

  • 6.
    Burger, Michael
    et al.
    Fraunhofer ITWM, Germany.
    Carlqvist, Conny
    Volvo Construction Equipment AB.
    Ekevid, Torbjörn
    Volvo Construction Equipment AB.
    Steidel, Stefan
    Fraunhofer ITWM, Germany.
    Weber, Dietmar
    Fraunhofer IZFP, Germany.
    Multiphysics simulations of construction equipment: coupling material machine and power source2018In: Commercial Vehicle Technology 2018: Proceedings of the 5th Commercial Vehicle Technology Symposium - CVT 2018 / [ed] Berns, K., Dressler, K., Fleischmann, P., Görges, D., Kalmar, R., Sauer, B., Stephan, N., Teutsch, R. & Thul, M., Berlin: Springer, 2018, Vol. 1, p. 481-492Conference paper (Refereed)
  • 7.
    Castenson, Joacim
    et al.
    Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
    Grandics, Moa
    Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
    Utmattningsanalys av marin ångpanna: Sunrod CPDB122018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Problems with fractures due to fatigue have been known since the early 19th century, and the phenomenon has been studied since then. After long periods of work, a methodology has been found to develop analytical fatigue calculation models for steel structures. The purpose of this work has been to investigate the fatigue assessments of marine boilers during it ́s economic lifetime. In this study, an analytical calculation has been made of the marine boiler using DNV's ship classification rules and the European pressure vessel standard. In the study, the authors have taken into account the boilers pressure variations, temperature variations, and the marine boiler's external impact from the vessel's motion in the water and the resulting forces. In order to be able to protect human life, nature and the environment, physical property (ships and cargo), operational availability as well as laws and regulations, with high reliability (confidentiality).

  • 8.
    Danielsson, Per-Olof
    et al.
    Volvo Construction Equipment.
    Ekevid, Torbjörn
    Volvo Construction Equipment.
    Kumar, Manoranjan
    Volvo Construction Equipment.
    Tim, Rothmann
    Fraunhofer Institute for Industrial Mathematics ITWM, Germany.
    Wilhelmsson, Markus
    Volvo Construction Equipment.
    Articulated Hauler Load Simulations: Recent developments2018In: Commercial Vehicle Technology 2018: Proceedings of the 5th Commercial Vehicle Symposium - CVT 2018 / [ed] Karsten Berns, Klaus Dressler, Patrick Fleischmann, Daniel Görges, Ralf Kalmar, Bernd Sauer, Nicole Stephan, Roman Teutsch, Martin Thul, Heidelberg: Springer, 2018, p. 505-517Conference paper (Refereed)
    Abstract [en]

    The paper presents recent method developments and activitiescarried out in the eld of load simulations and fatigue assessmentsat Volvo CE on the articulated hauler (AH) platform. Items discussedmore in details are hydraulic system simulation model improvements,road data scanning and usage of the virtual test tracks. Also the inertiarelief method for fatigue assessment without applying boundary conditionsin FEA is covered.

    Results from ongoing hauler projects and model validation activities aredemonstrated and the results conrm that Multi Body Simulations canthe used for load predictions on the hauler platform. The simulationresults are in line with and show a similar behavior as tests.

  • 9.
    Ekevid, Torbjörn
    et al.
    Volvo Construction Equipment.
    Carlqvist, Conny
    Volvo Construction Equipment.
    Sjödén, Therese
    Volvo Construction Equipment.
    Virtual Articulated Haulers: prediction of vehicle performance and design loads2015In: Multibody Dynamics 2015: Barcelona, June 29 – July 2 / [ed] Josep M. Font-Llagunes, Barcelona: International Center for Numerical Methods in Engineering (CIMNE), 2015, p. 1377-1387Conference paper (Refereed)
    Abstract [en]

    Articulated haulers are suited for any kind of transports in difficult terrain. The concept was developed from an agricultural tractor in the 1960’s by Volvo. The main features are the hydraulic steering, the individual front and rear frames connected with a rotational hitch joint, all-wheel drive and large tires. These features give the extraordinary terrain capability. Complete vehicle simulations support development of stability, handling and ride comfort properties during early development of the hauler. Complete vehicle simulations can also be utilized to extract design loads. This paper presents the current status in this field.

    The complete vehicle MBS simulation model includes flexible bodies, hydraulic system, tires and powertrain. A refined powertrain model in Simulink is used for the analysis presented. The environment is defined by the road and the driver. A comfort track road is used for comfort evaluations and a digitalized endurance test road for load predictions. The driver model aims to follow the given target path and velocity.

    Simulation and measurement signals are compared by means of relevant spectra; load ranges, level crossings and Power Spectral Density. A scalar measure is defined by the equivalent value to carry out comparisons between simulations and test. Fatigue load simulations need an accurate dynamic description of the vehicle, capturing low frequency excitation. The results shows that the load simulation captures the frequency peaks below 15 Hz, although there are some differences in magnitude and peak frequency. When simulated and measured equivalent values are compared most entities are in the range between 1/2 and 2 regarding estimated life. Further improvements are possible but the simulated load quality should also be related to other uncertainties in the fatigue evaluation process.

  • 10.
    Engström, Alexander
    et al.
    Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
    Glifberg, David
    Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
    Skrubberavfall: Hantering i hamn2015Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This paper deals with challenges associated with handling scrubber waste in the port of Karlshamn and what various industry partners are doing to meet this growing demand. The main challenges have been the proportion of ships with scrubber, the amount of generated waste and waste characterisation. An understanding of these factors has been crucial in order to ascertain the aim of this study, which has been made with calculations based on leading manufacturer’s scrubber analyses and with an estimation of the quantity of ships with scrubber by examining AIS data from the Port of Karlshamn. In order to calculate the quantity of scrubber waste two different scenarios were established, which in turn produced two different outcomes. It has been shown that these two do not represent a significant effect for the waste handling in port. It has been established that the scrubber waste is hazardous waste and needs to be disposed in port without involvement of other types of waste. The amount of scrubber waste is relatively small compared to today’s waste handling in Swedish ports and can be managed with ease, this despite a potential rising demand for scrubbers in the future.

    Keywords:  Scrubber, SECA, waste handling, sulphur oxide

  • 11.
    Hellberg, Edwin
    et al.
    Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
    Sundström, Fredrik
    Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
    Användning av direktuppkopplade oljesensorer på fartyg2019Independent thesis Basic level (university diploma), 180 HE creditsStudent thesis
  • 12.
    Hjorth, Fredrik
    Linnaeus University, Faculty of Science and Engineering, Kalmar Maritime Academy.
    Säkerhetskultur i Östersjöfart: En studie kring sjösäkerhet, säkerhetskultur och arbetsvillkor ombord på fartyg som trafikerar Östersjön2012Licentiate thesis, monograph (Other academic)
    Abstract [en]

    The main purpose of this thesis is to explore the safety culture onboard vessels trading in the Baltic Sea. The common denominator for vessels trading in the Baltic Sea is frequent port visits, coastal voyages, voyages in dense trafficked areas and small crews. Earlier research shows that there may be a system fault in the shipping industry. Charles Perrow describes the maritime industry as an error inducing system. He means that the cause for that is the way shipping is carried out. In a safety culture values, attitudes, competence and behavioral patterns are four important factors that define the safety culture. The maritime safety management system, International Safety Management Code (ISM) aims towards a proactive and evolutionally safety culture in the shipping industry. The results show that shipping today lacks a foresight, “failure of foresight”, where the proactive way of work leads to incidents and accidents being anticipated.

    This study has an ethnographic perspective, which aims to create a thick and substantial description of the culture that is being studied. Totally a number of eleven vessels participated in the study. The visits onboard reach from a couple of hours up to a few days. Collected data has been analysed through a self-developed model in an ambition to try to explain the safety culture. The model focuses on how information, feedback, responsibility, co-operation, follow-up and development are being handled. The study reveals that there is a need to discuss and change the safety culture in the shipping industry, in large as on the single vessel. As well as a need for further studies of how the safety culture can be improved and a need for education aimed towards system thinking, organizational theory and safety culture.

  • 13.
    Jernberg, Alexander
    et al.
    Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
    Hellström, Henrik
    Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
    Flettner-rotorer: Medvind oavsett vindriktning?2015Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Vinden har använts för att driva fartyg framåt i årtusenden. Dock har de praktiska fördelarna med moderna framdrivningssystem inneburit att segel helt försvunnit från dagens handelsfartyg. Om det ska vara möjligt att åter igen utnyttja vinden på ett effektivt sätt bör tekniken vara möjlig att integreras med dagens avancerade teknik gällande framdrift. Sjöfarten är en bransch som ofta präglas av små ekonomiska marginaler. Dessa marginaler påverkas bland annat av oljepriset som historiskt har varierat kraftigt. Detta har lett till att många rederier undersöker vilka möjligheter som finns att reducera bränsleförbrukningen. Flettner-rotorer som avlastningsmaskineri är en gammal metod som utvecklats och förbättrats vilket har lett till att tekniken åter igen är intressant. Följande studie har som syfte att besvara frågan hur lång tid det tar att tjäna in kostnaden för installationen av en rotorsegelkonfiguration genom minskad bränsleförbrukning. Inledningsvis genomfördes en litteraturstudie som låg till grund för utformandet av denna studie. Därefter genomfördes en simulerad sjöresa där Flettner-rotorernas påverkan på bränsleförbrukningen undersöktes. Resultatet visar att installationen av en rotorsegelkonfiguration kan vara ett konkurrenskraftigt alternativ på vägen mot ett mer bränsleeffektivt sätt att bedriva sjöfart.

  • 14.
    Levin, Erik
    et al.
    Linnaeus University, Faculty of Technology, Department of Mechanical Engineering.
    Andersson, Daniel
    Linnaeus University, Faculty of Technology, Department of Mechanical Engineering.
    Utveckling av bakluckan på Volvos ramstyrda dumper2019Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Målet med detta arbete var från början att ta fram 2-3 olika koncept som hindrar dumperns baklucka från att studsa och skapa onödigt buller. En produktutvecklingsprocess anpassades för projektet och användes för att systematiskt genomföra arbetet. Under arbetets gång gjordes valet att uppdatera målet till att ta fram en fullskalig prototyp och testa denna på en dumper. Resultatet blev en robust och ekonomisk produkt som hindrar bakluckan från att studsa och sänker dumperns bullernivå avsevärt.

  • 15. Lindström, Per
    Arctic Technology: Report of Committe V.62012In: Proceedings of the 18th International Ship and Offshore Structures Congress, Volume 2: Report of Committe V.6 - Arctic Technology / [ed] W. Fricke & R. Bronsart, Hamburg: Schiffbautechnische Gesellschaft , 2012, 1, p. 243-274Chapter in book (Other academic)
  • 16.
    Lindström, Per
    Chalmers University of Technology.
    Heat Transfer Prediction of In Service Welding in a Forced Flow of Fluid2005Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    An algorithm for heat transfer prediction of in-service welding operations in a forcedflow of fluid is presented. The algorithm presented is derived from Rosenthal’s 3D heatflow equation and boundary layer approximations. This was possible by the introductionof an apparent thermal conductivity kPL, which is a function of the boundary layer’s heattransfer coefficient f and the base material’s thickness . This implies that a weldcooling time ΔtT1 /T2 in a forced flow of fluid can now be calculated by an ordinaryengineering calculator and thus enabling suitable welding parameters to be determined.The magnitude of kPLf , was established by regression analysis of results from aparametric finite element analysis series of a total number of 112 numerical simulations.Furthermore, the result of the regression analysis was validated and verified by a weldingexperiment series accomplished on an in-house designed and constructed in-servicewelding rig. The principle design of the welding rig as well as its instrumentation, a PCbased Data Acquisition system, is described. In addition, a method to measure the weldmetals cooling time ΔtT1 /T2 by means of thermocouple elements is described. Finally,the algorithm presented in this study proved feasible for industrial in-service weldingoperations of fine-grained Carbon and Carbon–Manganese steels with a maximum Carbon Equivalent (IIW) (CE) of 0.32.

  • 17.
    Lindström, Per
    et al.
    Chalmers University of Technology.
    Ulfvarson, Anders
    Chalmers University of Technology.
    Weld Repair of Shell Plates During Seagoing Operations2002In: Proceedings of OMAE’02; 21st International Conference on Offshore Mechanics and Artic Engineering: June 23-28, 2002, Oslo, Norway, ASME Press, 2002, Vol. 3, p. 499-506Conference paper (Refereed)
    Abstract [en]

    An algorithm to estimate the cooling rate of welding seamson the shell plating of a ship, below the waterline, while it is onvoyage has been derived. The demand for this technique hasarisen from the wish of ship operators to make it possible forthe safe repair of ship structures without taking them out ofoperation. [1] The strength of the shell plating after welding isdetermined by its metallurgic structure, which is dependent onthe cooling rate, its chemical composition and the original grainsize of the base material. [2] The cooling rate for this type ofwelding seam depends on the velocity of the water flow, thedistance from the bow, the thickness of the plate, and the heatfrom the heat input of the welding. The algorithm makes itpossible to calculate the cooling rate for a base material affectedby a forced flow of fluid by means of Rosenthal’s equation andthus enabling suitable welding parameters to be determined.As the welding parameters can be chosen to fit the specificrepair to be made, it is now possible to determine the suitabilityof a welding procedure in advance. The algorithm is applicablewhen determining welding parameters at Hot-Tappingoperations as well, where the base material is affected by aforced flow of fluid. A number of experiments have beenperformed and the results support the theoretical model. Theresearch project continues with the aim of finding an algorithmto include the enhanced cooling rate due to the layer of boilingfluid on the back of the base material. A method to improve themeasurements of the most important parameter in the algorithmhas been developed and makes it possible to build up aquantitative database of typical values for various configurations.

  • 18.
    Lundgren, Mikael
    Linnaeus University, Faculty of Science and Engineering, Kalmar Maritime Academy.
    A Need for Speed?: The view on DP Seatime Reduction Courses2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The use of dynamic positioning (DP) systems onboard vessels today is spreading to non offshore related areas such as heavy lift carriers, luxury yachts and cruise liners etc. As this technology spreads, the demand for skilled DP personnel should increase. In order to get certified, the training scheme for DP operators (DPOs) ends with 180 days of supervised DP watchkeeping experience offshore. A way to reduce the required 180 days is to attend a DP seatime reduction course. The aim of this study was to get the DP industry’s view on seatime reduction courses and also explore if there a need for speed to get certified DPOs on the market. Parties included were the Nautical Institute, International Marine Contractors Association (IMCA), one oil company, six offshore shipping companies, accredited DP centres and DPOs across the world. The results showed that although the participants in this study are aware of seatime reduction courses few companies use them regularly, but those who do express satisfaction. The DP industry’s view on seatime reduction courses is positive, however somewhat unclear. Many feel simulator courses in general are good since they can give operators experiences that will take years to achieve onboard. If they should replace seatime gained offshore was doubtful. However, the study showed that seatime reduction courses are needed, especially for trainees working onboard vessels that only occasionally use DP. It has also been recognized that trainee DPOs have a hard time obtaining the required seatime in order to apply for their DPO certificate. This indicates that even though shipping companies in this study do employ trainees, this is not done to the necessary extent. There was also expressed a certain desire to improve the DP training scheme of today in order to achieve a higher quality among DPOs. The study shows there is a need for speed to get more DPOs on the market, but not to the detriment of quality. It is advised that studies are made on DP training quality, given the importance to maintain and even raise the level of competency among DPOs.

  • 19.
    Matthias, Balzer
    et al.
    Fraunhofer ITWM, Germany.
    Burger, Michael
    Fraunhofer ITWM, Germany.
    Dauwel, Thomas
    Volvo Construction Equipment, Germany.
    Ekevid, Torbjörn
    Volvo Construction Equipment, Sweden.
    Steidel, Stefan
    Fraunhofer ITWM, Germany.
    Weber, Dietmar
    Fraunhofer ITWM, Germany.
    Coupling DEM Particles to MBS Wheel Loader via Co-Simulation2016In: Proceedings of the 4th Commercial Vehicle Technology Symposium (CVT 2016) / [ed] K. Berns, K. Dreßler, P. Fleischmann, R. Ilsen, B. Jörg, R. Kalmar, T. Nagel, C. Schindler, N. K. Stephan, Kaiserslautern: Shaker Verlag, 2016Conference paper (Refereed)
    Abstract [en]

    A co-simulation scheme is developed that couples an MBS wheel loader model with the ITWM/DEM code for soil simulation, in order to realize a framework in which different loading maneuvers can be simulated and analyzed. An important issue for such analyses is to provide reaction forces during digging and loading that are sufficiently accurate to address questions of durability and energy efficiency. We present the coupling strategy, the coupled simulation approach as well as its realization that has been evolved during a project collaboration between the Fraunhofer ITWM and Volvo CE.

  • 20.
    Niklasson, David
    et al.
    Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
    Karlsson, Nicklas
    Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
    Eldrift inom skärgårdstrafiken: Ekonomiskt försvarbart eller en ren förlustaffär?2016Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    With the advance of technology electric propulsion is becoming a plausible alternative to conventional propulsion with diesel engines. Especially for the ferry traffic within the Swedish archipelago, where the conditions often are more favourable to alternatives like battery powered propulsion.

    One of the most important factors when building a ship or converting an existing one to hybrid propulsion is the cost. This study sheds light on the different challenges a small shipping company could face, when converting a ship. The study primarily focuses on the economic and environmental perspectives.

    A comparison has been made over the expenses for hybrid- and conventional propulsion, with the conversion and operation in mind. Interviews have also been conducted with employees of Koster Marin AB, who has been involved with the conversion of the company’s recently purchased vessel Kosterbris.

    The result shows that a hybrid solution is a better option than battery powered operation for Kosterbris.

  • 21.
    Piliego, Hadrien
    et al.
    Linnaeus University, Faculty of Technology, Department of Mechanical Engineering.
    Salari, Koorosh
    Linnaeus University, Faculty of Technology, Department of Mechanical Engineering.
    Virtual testing of articulated haulers2014Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Multi-body system dynamics is one of the most important theoretical achievementsin mechanics. With the development of the theory, corresponding commercialsoftware packages have been developed and are used for modellingand simulation of complicated large systems, such as air planes and vehicles.This kind of virtual prototypes can be used for studies and assessments ofreal systems even before the real systems are built. As a result, the high costprototype building and prototype testing can be saved, so as the time can bereduced. This is just the demand of modern industry. This theory can beapplied on the vehicle-virtual road interaction study which has been used inthis thesis.This thesis suggests a target velocity prole for a heavy vehicle which driveson tough road. Having uneven and hilly road, actual driving conditions arechanged as the driver runs the vehicle. Drivers can perceive the road conditionwith their visual organ and sense of balance and then they control theirvehicles more safely by re ecting various conditions of this target velocityprole. Without this process, the driving-stabilization on slope and twistingroads would fall considerably, and the problem could be directly connected tooverturning. This thesis, moreover, will show how to acquire the road data,extract the velocity prole, and verify the performance of the suggested velocityprole through virtual road test.In vehicle-virtual road interaction simulation, multi body system (MBS) dynamicswith software Adams has been employed to model an articulatedhauler. The simulation has been validated by velocity prole test data andcompared to the former velocity prole. This method can be used for estimatingthe eects of dynamic forces on the frame so that the load design canbe assessed in vehicle design process.This project is in collaboration with Volvo Construction Equipment AB,Braas, Sweden.

  • 22.
    Rosengren, Hampus
    et al.
    Linnaeus University, Faculty of Science and Engineering, Kalmar Maritime Academy.
    Sjöberg, Johan
    Linnaeus University, Faculty of Science and Engineering, Kalmar Maritime Academy.
    Teoretiskt och praktiskt lärande: På Sjöfartshögskolan i Kalmar2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose: We have investigated the relationship between theoretical and practical learning of the Nautical Science Program(4years) at the Linnaeus University. We focused on examining whether the theoretical knowledge is a prerequisite for the students to meet the expected learning outcomes during the first ship based training. Method: We preformed a literature review covering four different educations. We did also look in to three different types of mentoring models which in one way or another are applicable to those courses. In order to critically examine our literature and to find out the actual condition, we conducted five interviews with informants. Result: Made it possible to see a number of similarities in educational programs approach between theoretical and practical learning and guidance models used. Conclusion: The Basic Safety Training is a prerequisite for students to go out on the ship based training but it is not a prerequisite for achieving the expected learning outcome. We have noted that the supervisor and the supervisor’s knowledge and skills plays a central role for the conditions in which the student is given in order to achieve the study objectives of the first ship based training.

  • 23. Soares, C. G
    et al.
    Basu, R.
    Cerup Simonsen, B.
    Egorov, G. V.
    Hung, C. F.
    Lindström, Per
    Samuelides, E.
    Vredeveldt, A.
    Yoshikawa, T.
    Damage Assessment After Accidental Events: Report of Committee V.12009In: Proceedings of the 17th International Ship and Offshore Structures Congress: Volume 2 / [ed] C.D. Jang & S.Y. Hong, Seoul, Korea: Seoul National University , 2009, 1, p. 1-72Chapter in book (Other academic)
    Abstract [en]

    This paper contains the report of the Committee, which is a new one that was created todeal with the methods to assess damage and residual strength after accidental events.The name of the committee, being a short one may give a wrong impression about itsscope as it mentions damage assessment while the mandate refers that there should beconcern for the extent of damage and local and global residual strength of shipstructures, after accidental events. Therefore the contents of the report deal also withmethods to determine local and global residual strength, including the specification ofthe appropriate loads.It starts by providing a description of the type of damages that can be found in thevarious accidental events. Representative scenarios are described and the typicaldamages that results from the specific accidents are indicated. Next section describeshow in real situations the damaged state is perceived. Thus, inspection methods aredescribed as well as the available approaches to derive information about the status ofthe structure from indirect measurements.Loads on the structure are treated afterwards, including the loads that are generatedduring the accidental situation itself and also after the accident when the ship is indamaged state, often listed and with non symmetric sections. The loads are used todetermine ship strength using the assessment methods described in section 5, whichdeals with various types of components.If the ship is considered not having enough strength for temporary voyage to repairyard local repairs are necessary. Otherwise she will travel to a repair shipyard and berepaired there. The various types of problems raised in repair are dealt with in thefollowing section.Finally last section deals with salvage and recovery strategies which are necessary inthe cases of very large damage in ships.

  • 24.
    Wewel, Jonathan
    et al.
    Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
    Tranvik, Anton
    Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
    Kylvattenbehandling: En studie av olika korrosionsskydd för kylvattensystem till marina dieselmotorer2019Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Kylvatten används för att kyla framdrivningsmaskineri och övrig utrustning med kylbehov

    ombord på fartyg. För att förhindra rost i den utrustning som skall kylas, måste kylvattnet

    behandlas. Som rostskydd används idag kemikalier. I samband med byte av kylvattnet,

    hamnar dessa kemikalier ofta i havet, vilket leder till negativ miljöpåverkan.

    I detta examensarbete har möjligheten att använda kemikaliefri vattenbehandling istället för

    kemikalier som rostskydd i system med vattenburen värmeöverföring undersökts. Kontakt

    med olika företag och en intervju med personal på ett fartyg med installerad elektromagnetisk

    vattenbehandlingsutrustning har gett information för undersökningen. Vi har också gjort egna

    mätningar på vatten i värmesystem med avjoniseringsutrustning och på tekniskt vatten

    behandlat med kemikalier. Mätningarna har använts för att undersöka hur vattnet påverkas av

    dessa behandlingsmetoder.

    Denna undersökning har inte resulterat i något entydigt svar på om kemikaliefri

    vattenbehandling kan ersätta kemikalier i kylvattnet till ett fartygs framdrivningsmaskineri,

    men visat att det är ett möjligt alternativ för mindre slutna system.

1 - 24 of 24
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