基于隐式参数化耦合模型的车身集成优化

为提高车身截面优化效率，基于SFE CONCEPT构建白车身关注部位的隐式参数化模型，并与白车身有限元非参数化模型进行耦合，使参数化模型与有限元模型耦合边界处的连接关系随截面变化自动更新，通过试验验证耦合模型的有效性。基于试验设计（design of experiments, DOE）方法、近似模型、多目标优化等策略，对白车身耦合模型进行刚度和模态等多学科集成优化，实现车身局部结构快速轻量化设计。

Integrated optimization of vehicle body based on implicit parametric coupling model

To improve the efficiency of vehicle body section optimization, the implicit parametric model of interesting locations of body in white is built based on SFE CONCEPT. The model is coupled with the non parametric finite element model of body in white, and then the connection relationship between the coupling boundary of the parametric model and the finite element model is updated automatically with the change of the section. The validity of the coupling model is verified by tests. Based on the design of experiments(DOE) method, approximate model, multi objective optimization and other strategies, the multi disciplinary integrated optimization of stiffness and mode is carried out on coupling model of body in white. The fast lightweight design of local structure of vehicle body can be realized.