| Summary: | 碩士 === 國立臺灣海洋大學 === 輪機工程系 === 101 === With the boom of cargo transportation business and the influence of the global energy crisis in recent years, reduction of carbon dioxide and large volume of cargo transportation has become the major concern in designing the new container ships. Besides the energy shortages, the cost of materials is getting increase with the energy prices soaring. To save energy and reduce carbon dioxide without affecting the structural strength, it is advised to reduce the material usage. It can also lower the production cost and maximize the economic benefits.
CSBC Corporation built large number of container ships with the increasing number of the cargo carrier. As the containers under the deck mainly supported by the bulkhead of lateral structure, the lashing structure of the container is getting more important. This research is based on the safety of lashing bridge’s overall structure and the convenience for crews to repair the compressor of refrigerated cargo containers. The finite element method is used to analyze the strength of the structure in the lashing bridge. The research includes constructing the solid modeling and mesh with the analyzing software, simulation and analysis based on the force distribution of the structure and to improve the setting of the lashing bridges. With the lashing bridge’s analysis for the configuration structure and increase of the force taken by the structure, research is conducted for the force of #1 lashing bridge. It is suggested for a comparative analysis leading to the lightweighting of the lashing bridge.
The analysis includes comparing the result of the ship structure analysis, simulate the effect of the improvement measures etc. This research used the ANSYS Workbench software to do static analysis of the variations based on K-TYPE. The design is in regard to the size of pillar, the angle of Oblique support, the variations of span. A more stable permutations and matching size board is found based on von-mises stress, normal stress and shear stress which under the regulation.
Derive from the simulation result, the spans of the pillars with oblique support and without oblique support are 2758mm and 1700mm respectively. The weight can be reduced up to 26.86%. The materials used in the stress of the structure concentration position can afford allowable stress. In terms of the static structure analysis, structural strength of lashing bridges has reached the requirement of regulations stress and lightweight. The research result is expected to contribute on the strengthening of the lashing bridge structure and reducing the bridge’s weight.
Keywords: Lashing bridge, Finite element analysis, Container ship
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