某异型结构振动夹具的设计及试验验证

目的完成某异型飞行器的振动夹具设计。方法对初步设计的夹具进行有限元模态仿真计算、传递均匀性仿真计算,结合仿真计算结果,有针对性地对夹具进行设计改进。经仿真计算,设计改进后夹具满足设计固有频率及均匀性要求。结果夹具固有频率的试验结果与仿真计算误差约为7%,均匀性也较吻合。结论验证了仿真计算结果的正确性、设计的合理性,该异型飞行器振动试验进一步验证了该夹具传递特性也较好。

Design and Experimental Verification of a Special Shaped Vibration Fixture Structure

Objective To design a vibration fixture of a special shaped aircraft. Methods Firstly, the finite element modal simulation calculation and the uniformity simulation calculation were carried out for the preliminary design of the vibration fixture. The vibration fixture was improved based on the simulation results. By calculation, the fixture after design improvement met the design requirements on frequency and uniformity. Results There was an error of 7% between the natural frequency test result of the fixture and simulation calculation. The uniformity was also consistent. Conclusion The result of simulation calculation is correct and the design is reasonable. The transfer characteristic of the fixture is good.