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柔性浮筏隔振系统的理论建模与仿真研究

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  • 发布时间:2014-03-17
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Ship floating raft isolation system is an important technology which is used to improve the acoustic stealth performance of warships and submarines, and power flow is an important method of evaluating vibration isolation effect, so power flow is used as floating raft isolation system performance assessment method. The influence of raft frame and infrastructure flexibility is taken into account on the vibration isolation by the power flow method.The result indicates that the rigid and the flexible raft frame are almost consistent in the lower frequency range.The impacts from the system parameter, including equipment mass, stiffness and damping ration of upper and lower isolator and the structural damping of the raft frame and infrastructure, on vibration isolation system's power flow transfer characteristics are discussed. Adams software package is used for the simulation of the floating raft with multi rigid and flexible bodies. The results show a good agreement with the theory.舰船浮筏隔振系统是舰艇、潜艇提高声隐身性能的重要技术途径之一,而功率流是评价隔振系统性能的有效实用方法,文章利用功率流作为浮筏隔振系统的性能评估方法,就筏架和基础结构的柔性变形对隔振效果的影响进行了理论与数值分析,发现在低频段刚性和柔性筏架的数值结果基本一致。还研究了负载质量、隔振器刚度和阻尼以及筏架和基础的结构损耗因子对隔振系统性能的影响。在文中的仿真研究中使用了Adams多体刚柔耦合建模仿真方法分析了浮筏的动力学特性,结果与理论解较为一致。

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