结构频率响应灵敏度计算及响应修改研究

The Computation of the Sensitivity of Structural Frequency Response and Its Response Modification

提出了一种通过修改结构的设计参数从而修改结构频率响应幅值的方法 ,推导出了结构频率响应对设计参数的灵敏度计算公式 .通过优化方法求解满足频率响应要求的设计参数的变化量 ,并采用模态缩减法减少结构重分析的计算量 .算例表明 。

In this paper, a method is proposed to modify the structural frequency response magnitude through the modification of design parameters. The sensitivity of structure frequency response magnitude to design parameters is derived. The changes of design parameters are solved by using nonlinear optimization to satisfy the frequency response requirement. Model reduction is introduced to reduce computational cost. The accuracy of the proposed approach is demonstrated via numerical examples.