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| Nonlinear damping sensitivity analysis of floating raft vibration-isolating system under multi-source excitation |
| ZHAO Qun, ZHANG Yi-Min |
| School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110004, China |
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Abstract Sensitivity analysis and optimization of complex structure is the key problem of structure design. By utilizing mobility method, response and characteristics of power flow of floating raft vibration-isolating system under multi-source excitation was analyzed. Sensitivity analysis method was adopted to analyze the sensitivity of given parameters as well as the sensitivity when there exists nonlinear damp in this system. Research on sensitivity of system characteristics on these parameters was carried out and then the effect of the parameter change was estimated, which was employed to guide optimization of system structure.
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Published: 28 February 2009
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多源激励下浮筏隔振系统非线性阻尼灵敏度分析
复杂结构的灵敏度分析及其优化是结构设计的重要问题．利用导纳法分析多源激励浮筏隔振系统振动响应和功率流特性,用灵敏度分析方法研究系统对于给定参数的灵敏度,并对系统中存在非线性阻尼时的灵敏度进行分析．研究系统特性对这些参数的敏感程度,估计参数变化的效果,从而指导系统结构的优化．
关键词：
多源,
浮筏,
功率流,
导纳,
非线性阻尼,
灵敏度
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