论文部分内容阅读
用等效板理论计算蜂窝板等效结构参数建立基准有限元模型,对基准模型中结构参数施加摄动量建立待修正有限元模型。根据均匀设计方法将等效参数分为不同水平的参数组,分别计算各参数组对应的模态频率响应,然后建立基于一次式-高斯组合径向基函数(Linear-Gaussian RBF)的响应面模型。引入变异算子的改进粒子群算法修正响应面模型,将搜索到的参数摄动量(优化解)代入待修正模型,得到修正后模型。通过比较基准模型与修正前后模型的结构参数和模态频率响应的接近程度,证实了修正方法的有效性。基于响应面的模型修正避免了迭代中重复调用有限元计算,可提高分析效率。
Equivalent plate theory is used to calculate the equivalent structural parameters of the honeycomb panel to establish a reference finite element model, and the perturbation amount is applied to the structural parameters in the reference model to establish a finite element model to be corrected. According to the uniform design method, the equivalent parameters are divided into different levels of parameter groups, and the corresponding modal frequency response of each parameter group is calculated respectively. Then the response surface model based on the linear-Gaussian RBF . The modified particle swarm optimization with mutation operator is used to modify the response surface model, and the perturbed quantity (optimal solution) of the searched parameters is substituted into the model to be corrected to obtain a modified model. The validity of the correction method is verified by comparing the structural parameters of the baseline model and the model before and after modification with the modal frequency response. Response surface-based model modification avoids the repeated calls of finite element calculation in iteration, which can improve the analysis efficiency.