基于实验模态分析的航空电子机箱振动特性研究

Dynamic characteristics research of an airborne electronic box based on experimental modal analysis

论述了使用实验模态分析方法对某型号航空电子机箱测量频响函数的全过程;通过参数识别方法获得了产品的模态,进而确定了产品的振动特性;最后,使用有限元软件工具对产品FEA模型进行了动力学仿真分析,将仿真结果与模态实验结果进行比对,并修正了产品的有限元模型。

This paper gives a detailed discussion on the process of measuring frequency response functions（FRFs） for a airborne electronic box based on experimental modal analysis.The modes and vibration characteristics can be determined by the identification of modal parameters.Finally,the FEA model of the airborne electronic box modified by the results of the modal test needs to be simulated to analyze its structural dynamic characteristics.