基于有限元仿真的大量级振动放大夹具设计

Design of Large Scale Vibration Amplification Fixture Based on Workbench Simulation

振动试验的目的是在模拟产品实际边界条件的环境下考核其结构和性能是否满足设计及使用要求。在航空航天领域的产品,均要经过振动试验的考核验证后才能投入生产使用。一些产品的实际的工作环境非常恶劣,这种环境涉及高频率、大量级振动,对于这种严苛的振动环境,只依赖于振动台能力来实现会存在局限性。为了实现高频率、大量级振动环境,利用振动夹具在固有频率区间内放大的特点,结合有限元分析进行前期的设计及仿真。最终通过振动台试验验证了实际方法的有效性,从而为大量级振动试验及夹具设计提供了依据。

The purpose of vibration testing is to assess whether the structure and performance of the product meet the design and usage requirements in an environment that simulates the actual boundary conditions of the product.Products in the aerospace industry must undergo vibration testing and verification before they can be put into production and use.The actual working environment of some products is very harsh,which involves high frequency and a large number of levels of vibration.For this harsh vibration environment,relying solely on the ability of the vibration table to achieve it will have limitations.In order to achieve a high-frequency and large-scale vibration environment,the characteristics of amplifying vibration fixtures within the natural frequency range are utilized,and the preliminary design and simulation are carried out using finite element analysis.The effectiveness of the actual method was ultimately verified through vibration table tests,providing a basis for large-scale vibration tests and fixture design.