计算船舶与海洋平台上设置的液舱振动模态影响时，舱内液体附加质量对总体振动有较大影响，为了研究其振动特性，将此耦合系统简化为充液箱体的振动，基于流固耦合理论，运用有限元软件ADINA建立有限元模型并进行数值计算.采用LMS结构模态分析系统进行实验研究，对比分析了不同充液高度下的振动低阶固有频率和振型.仿真结果与实验测量结果吻合较好，验证了仿真方法的有效性.所获结果和方法可为流固耦合方面研究提供参考.
Abstract
The liquid tanks are installed in ships and offshore platforms, and the impact of liquid medium in the liquid tanks on vibration performances of the hull should not be overlooked. The paper developed a finite element mathematical model of fluidstructure interaction (FSI) for the steel tank. The FSI dynamics in different liquid heights in liquid tanks were numerically simulated and analyzed by the FEM software ADINA. By adopting LMS structural mode analysis system, the paper compared inherent frequencies and modes of lowfrequencyvibration. Simulation results are in good agreement with the experimental ones, which verifies the effectiveness of the simulation method. The findings and methods can be reference for fluid structure interaction.
关键词
船舶 /
液舱 /
振动模态 /
固有频率 /
附加质量 /
流固耦合 /
有限元
Key words
ship /
liquid tanks /
vibration modal /
inherent frequency /
added mass /
solidfluid coupling /
finite element method
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参考文献
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基金
中央高校基本科研业务费专项资金资助项目(3132013337)
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