Vibration test fixture is used to fix the specimen on the vibration table during the vibration test. The accuracy of the test result depends on whether the fixture can accurately transmit the load signal to the specimen. Firstly the fixture for the automobile headlight vibration test is designed by choosing its material, structure and manufacturing mode. Then topology optimization and modal analysis for the designed fixture is also carried out to optimizing the fixture' s structure. Finally, the experimental results demonstrate that the designed text fixture meet the requirements of the vibration test.%振动试验夹具在振动试验中起到连接试件与振动台的作用,能否平稳地将振动台的载荷传递到试件上,对试验结果的准确性起决定性作用.针对某汽车前大灯,根据振动试验规范要求,通过对材料、结构和制造方式的选择,设计了用于在试验中固汽车前定大灯的夹具.在设计过程中运用Hyperworks软件对设计的夹具进行拓扑优化以及模态仿真分析来优化设计结果,最终通过试验,验证了所设计的夹具满足试验要求,保证了试验过程的稳定性和试验结果的可靠性.
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