光学平台模态实验分析
Modal testing and analysis of optical platform
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摘要: 采用ANSYS有限元方法分析了光学平台的自由模态，并以有限元结果作为参考，完成了实际工况下的模态实验，识别了平台整体结构的模态参数，得到了平台在垂向和横向的一阶频率，频率值分别为126.77 Hz和361.427 Hz。根据分析，该平台的刚度满足光学试验的要求。Abstract: The free modes of an optical platform were analyzed with finite element method, and then the modal testing was accomplished in actual operating conditions. The first order frequencies in the vertical and horizontal directions of the optical platform were obtained by identifying the modal parameters of the platform structure, which were 126.77 and 361.42 Hz respectively. The stiffness of the platform was verified to meet the requirements for the optical experiments.
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Key words:
- optical platform /
- dynamic characteristic /
- modal simulation /
- modal testing /
- impacting method
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