试验模态分析是识别机械结构系统固有特性的一种常用、有效的现代技术。
The test modal analysis is an effective means to identify the intrinsic attribute of a mechanical structure.
模态分析用于确定设计中的结构及其部件的振动特性，包括结构的固有频率和振型。
Modal analysis is used to determine the vibration characteristic of a structure and its components, including the natural frequencies and vibration modes of the structure.
通过对白车身的模态分析，获得了车身结构固有的振动特性，并找出了车身结构在动态激励时的薄弱环节。
By the results of modal analysis of the body in-white, the body's natural dynamic features are got in the paper, and located some weakness of the structure.
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