广义结构结合部参数辨识公式及算法

 提出了一个利用实测传递函数辨识结构结合部参数的一般公式,给出了相应的辨识算法。由于该方法对动态测试尤特殊要求,故扩大了适用范围,方便了工程应用。在辨识算法上,避免了对实测传递函数矩阵的反复直接求逆运算,降低了辨识参数对测试误差的灵敏度,提高了辨识精度。实例验证该方法具有良好的辨识精度。

A MORE GENERAL FORMULA AND ALGORITHM FOR IDENTIFYING STRUCTURAL JOINT PARAMETERS

A more general identification formula is presented to identify structural joint parameters by using the experimentaI Frequency Response Functions(FRFs),and its identiflca-tion algorithm is presented correspondingly.It is proved that the proposed method is superior to that proposed by Tsai and Wang,because the latters are only special cases of the forrner.There is no special requirement for the dynamic experiment in the proposed method,so it has wider appli-cations and is more convenience in engineering.In addition,the proposed method can significantly decrease the adverse effects due to avoiding inverse operation time and again on the experimental FRFs matrices.The numerical example shows that the identification accuracy is sat-isfactory.