平面薄板结构应变模态分析

An analysis of strain modality of the level sheet structure

从位移模态出发推导了应变模态的表达式;以平面薄板模型为例,进行了位移模态与应变模态实验分析,并与有限元计算结果进行比较,验证了三者识别的模态参数基本一致,而且应变模态分析方法可以清晰看到有孔板的应变模态在孔处有突变。

Proceeding from the displacement modality,the expression of strain modality is deduced.Take the level sheet model as an example,the experimental analysis is made of the displacement modality and strain modality,and the analysis is compared with the computing results of the finite element.The fact is tested and verified that the modal parameters of the above two modalities and the finite element are basically the same.The strain modality analysis may clearly show that the strain modality at the hole of the hole board may change suddenly.