为了提高机载符合联合标准航空电子结构协会印制板简化有限元模型的精度,对印制板模型相关参数进行实验设计和灵敏度分析,并采用标准全二阶多项式的方法拟合出响应面模型。在响应面模型的基础上,使用印制板组件实测前三阶模态频率构造目标函数,采用多目标遗传算法进行优化求解,得到印制板有限元模型修正后的参数。修正后的仿真计算模态频率与实验模态频率前三阶误差分别为0. 76%、5. 20%、4. 42%,误差较小,能满足工程需求。

To improve the accuracy of airborne allied standard avionics architecture council (ASAAC) printed circuit board Simplified finite element model, the design of experiment (DOE) and sensitivity analysis of printed circuit board model parameters are implemented. And full 2nd order polynomials method is used to fit response surface model. Based on the response surface model and first three experimental modes, the multi-objective genetic algorithm (MOGA) is taken to solve the objective function, in order to achieve the updated model parameters of printed circuit board. The errors between experimental modal frequency and updated computation modal frequency of first three modes are 0. 76%、5. 20%、4. 42%. The accuracy of this method is proved which can meet engineering requirement.

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