汽车仪表盘外壳模外装饰工艺仿真及其参数全局优化

以聚碳酸酯（PC）为薄膜材料，采用有限元方法对仪表盘外壳模外装饰（OMD）贴膜成型进行仿真，得到薄膜厚度的分布及其在x、y方向上的变形分布，在此基础之上，以三者的标准偏差同时最小来设计目标函数，采用试验设计的方法来建立近似模型，最后对贴膜工艺参数进行全局优化分析。结果表明，基于椭圆向基神经网络模型（EBF）模型采用自适应模拟退火算法（ASA）全局优化算法对OMD工艺参数进行优化分析所得到的结果无论在厚度分布还是变形精度上的效果都最好。

Simulation of Film Posting of Vehicle Instrument Panels and Its Global Optimization of Process Parameters

The finite element method is adopted to simulate the film posting process of out side mold decoration (OMD) by using polycarbonate (PC) as a film material. The distribution of the film thickness and the film deformation contours in x and y directions were derived from this simulation, and the influence factors of film molding were analyzed. In order to achieve a minimum standard deviation in average film thickness and x and y directional deformation, an optimal latin hypercube sampling method was adopted to establish the approximate model, and the process parameters of film molding was analyzed by a global optimization model. The results indicated that the uniform distribution of film thickness and high deformation accuracy were achieved on the basis of such a global optimization model.