摘要
结构连接特性的确定对于分析整个结构系统的动态特性非常重要。本文提出利用实测频响函数,分别对单个连接自由度进行独立辨识的识别计算方法。与现有方法相比,它具有计算简单,测试工作量小,工程应用方便等特点,实际的数值模拟与实验测试说明该方法有令人满意的辨识精度。
The dynamic properties of the mechanical system are significantly affected by mechanical joint properties. To determine the mechanical joint properties is very important to understand the dynamic behavior of the whole mechanical system. This paper, by using the tested frequency response functions (FRFs) , and the algorithm of independent identification for each joint degree of freedom, presented a method to identify the structural joint parameters. It is proved that the proposed method has the characteristics of simple calculation, small number of measurement etc. , and is convenient to engineering. The numerial example and experiment show that the i-dentification accuracy is satisfactory.
关键词
结构连续特性
参数辨识
机械结构
joint properties of structure
identification of parameters
modal test
substructure
