复杂结构中非线性元件位置判定

Non linear Elements Position Identification in a Complex Structure

非线性系统在不同力幅的正弦激励时，其频率响应函数将随力幅而变化．在研究非线性系统广义频率响应函数表达式的基础上。

When a series of different levels of sine excitation force is imposed on a non linear testing structure,the response data vary with the force. Based on the equation of General Frequency Response Functions (GFRF) of the non linear dynamic systems, the difference is applied to detect the non linear element positions in a complex structure.