某振动夹具参数优化设计方法研究

Research on Parameter Optimization Design Method of a Vibration Fixture

为了提升航空发动机燃油控制系统附件产品振动夹具正向设计与优化能力,以某液压机械装置产品振动夹具为研究对象,通过对该振动夹具进行参数化建模,以振动夹具结构尺寸参数为设计变量,振动台尺寸约束和夹具重量指标要求为约束条件,利用多目标遗传算法等多目标优化设计,在兼顾振动夹具重量指标及一阶固有频率最大化目标前提下,使得优化后振动夹具一阶固有频率提高了22.5%,夹具重量减小了11.2%,提升了振动夹具的性能。优化验证与对比证明了设计方法的可行性及有效性。该方法可以推广应用到后续产品振动夹具优化设计中,从而提升振动夹具的振动传递特性品质,为保证振动试验考核结果的准确性奠定基础。

In order to improve the forward design and optimization ability of vibration fixture for aero-engine fuel control system accessories,a hydraulic mechanical device product vibration fixture is taken as the research object,and the vibration fixture structure size parameter is taken as the design variable,and the size constraint of the shaking table and the weight index requirement of the fixture are taken as the constraint conditions.By using multi-objective optimization design such as multi-objective genetic algorithm,the first order natural frequency of the vibration fixture is increased by 22.5%,the weight of the fixture is reduced by 11.2%,and the performance of the vibration fixture is improved.The feasibility and effectiveness of the design method are proved by optimization verification and comparison.This method can be applied to the optimization design of vibration fixture for subsequent products,so as to improve the quality of vibration transmission characteristics of vibration fixture and lay a foundation for ensuring the accuracy of vibration test results.