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Dynamic Response Analysis of Suction Box

Author: ZhangZuo
Tutor: YangZhiGuo
School: Harbin Engineering University
Course: Design and manufacture of ships and marine structures
Keywords: suction box FSI response characteristic quality exchange
CLC: U674.703
Type: Master's thesis
Year: 2009
Downloads: 43
Quote: 0
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Abstract


The ship suction box (also known as the sea valve or the sea chest) is one of the most important parts of ship structure and its reliability is directly related to the ship’s normal operation, the crew and passengers’ normal life, as well as the safety of persons on board. However, few words were presented to the relevant norms of ships, therefore, it is significant to do deep research on the water-induced dynamic response of suction box.Numerical simulation method of fluid-structure interaction (FSI) is used to study the dynamic response law of the suction box in this paper. A study of the formula for calculating strength was preliminarily done and the reliability of numerical simulation was verified combined with physical experiments.Firstly, how to use FSI numerical simulation method was explored on the suction box for the structural dynamic response analysis. A suitable turbulence model and optimal mesh is chosen to complete FSI numerical simulation on the physical experiment model. Its result fits well with the experiment data, so the reliability of the numerical simulation is verified. Based on this, FSI numerical simulation is done to four common forms of suction box.Secondly, the vibration characteristic of suction box is discussed. Both inherent characteristics (dry and wet modals) and fluid-induced vibration are analyzed.Thirdly, the structure strength is checked through the FSI analysis. In order to fit the formula for calculating strength easily, it is necessary to take research on suction boxes with different spans, and a better loading project is confirmed. Then summing up the rule, formula for calculating strength of the suction box was given. Fourthly, take XX ship’s suction box as an example and analyses its dynamic response rule under working state. Mass exchange phenomenon exists when the suction box works, so it is necessary to check the influence of mass exchange on the structural response.

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CLC: > Transportation > Waterway transport > Marine Engineering > Various types of vessels > Military ships ( warships ) > General issues > Structure
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