谐调柔性机构的失谐动态响应分析

Analysis of Mistuned Dynamic Response of Tuned Flexible Mechanism

谐调机构在构件柔性大速度快的情况下,出现失谐动态响应。为了揭示这种现象,建立了谐调机构虚拟样机模型并进行运动仿真,得到了谐调机构的受力失谐和质量失谐的动态响应。利用蒙特卡洛方法得到随机失谐量引起的动态响应分布。计算结果表明,周期柔性机构存在失谐动态响应,并且在机构中以振动形式传播,为进一步研究失谐机构振动局部化特性研究打下了基础。

The tuned mechanism has mistuned dynamic response when significant flexibleness of components and high speed of mechanism are considered. In order to research mistuned responses, a virtual prototype model of tuned flexible mechanism is applied to simulate kinematics and dynamics. Dynamic responses are simulated in case of mistuned force and mistuned mass. The random parameter sampling data are computed by Monte Carlo method and stochastic response distribution is given by statistical analysis. The results showed that there are mistuned responses in periodical flexible mechanism. The mistuned responses are propagated in form of components vibration in flexible mechanism. The research has laid foundation on vibration localization features of mistuned mechanism.