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Showing result 1 - 5 of 40 swedish dissertations matching the above criteria.

2. 1. Rigid Body Ship Dynamics

   Author : Martin Alexandersson; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Inverse dynamics; Extended Kalman filter; Ship digital twin; Ship manoeuvring; RTS smoother; Multicollinearity; System identification;

   Abstract : It is common today that operational data is recorded onboard ships within the Internet of Ships (IoS) paradigm. This enables the possibility to build ship digital twins as digital copies of the real ships. Predicting the ship’s motions with ship dynamics could be an important sub-component of these ship digital twins. READ MORE

4. 2. Ship and Society : Maritime Ideology in Late Iron Age Sweden

   Author : Gunilla Larsson; Ola Kyhlberg; Mats G. Larsson; Uppsala universitet; []
   Keywords : HUMANIORA; HUMANITIES; Archaeology; Ships; Seafaring; Society; Late Iron Age; shipbuilding methods; symbols; sacrifices; boat burials; ideology; leiðangr; long distance journeys; river routes.; Arkeologi; Archaeology; Arkeologi;

   Abstract : This thesis analyses the relation between ship and society against a background of ideological and technological changes in Late Iron Age Sweden. It discusses the factors behind the development of ‘a maritime society’, why ships and seafaring came to play an important role that was also reflected in the use of the ship as a symbol and a metaphor in a military context, as well as in religion, administration, jurisdiction and social life. READ MORE

5. 3. Indirect System Identification for Unknown Input Problems : With Applications to Ships

   Author : Jonas Linder; Martin Enqvist; Fredrik Gustafsson; Alexandre Sanfelice Bazanella; Linköpings universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; System identification; Model structure; Unknown inputs; Indirect input measurements; Physical models; Instrumental variable; Closed loop; Graybox model; Identifiability; Ship; Marine vessel; Operational safety; Inertial measurement unit;

   Abstract : System identification is used in engineering sciences to build mathematical models from data. A common issue in system identification problems is that the true inputs to the system are not fully known. In this thesis, existing approaches to unknown input problems are classified and some of their properties are analyzed. READ MORE

6. 4. Structural Safety Analysis of Bow-Doors

   Author : Ulf Karlsson; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ship design; structure; safety; fatigue.; arm; IACS S8; damage; bow-door; analysis;

   Abstract : Bow-doors are one of the most vulnerable parts on a RoRo-vessel. At the same time, they are necessary for the profitability of todays RoRo-vessels.The minimum design rules for bow-door systems, stated in the International Association of Classification Societies (IACS) S8, constitute the basis for the class rules. READ MORE

7. 5. Random Fatigue Analysis of Container Ship Structures

   Author : Wengang Mao; Göteborgs universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; RAOs; rainflow counting; narrow band approximation; zero up-crossing response frequency; significant wave height; ship structure response; S-N curve; spatio-temporal model; safety index.; zero up-crossing response frequency;

   Abstract : .... READ MORE