优化集成系统平台的建立及其应用研究

Research on the Establishing and Application of Integrated Optimization System Platform

通过隐式参数化软件SFE CONCEPT进行参数化建模,利用多学科设计优化软件iSIGHT集成SFE CONCEPT、求解器LS-DYNA和数据处理器Matlab,建立优化集成系统平台,以实现产品开发过程优化的快速、自动化.以新开发车型前保险杠横梁为例,在保证碰撞安全性的前提下针对保险杠横梁的轻量化问题,对横梁空间形状、截面高度、宽度以及厚度进行优化.以质量最小为优化目标,碰撞压缩量与车体加速度峰值为约束条件,采用最优拉丁超立方试验设计和模拟退火算法,通过优化集成系统平台对模型进行40%偏置、刚性墙、刚性柱三类低速碰撞仿真分析,得到了满意的效果.

To achieve optimization rapidly and automatically in the process of product development, an integrated optimization system platform was established by modeling with the implicit parametric software SFE CONCEPT, and integrating SFE CONCEPT, the solver LS-DYNA, and the data processor Matlab with the multidisciplinary design optimization software iSIGHT. For an example, the lightweight optimization of the shape in space, the section, and the thickness of the front bumper beam was carried out with the premise of ensuring the safety of collision. With minimizing the mass of beam as the objective , the compressed displacement and the peak of acceleration as the constrains, the optimization under three lowspeed crash simulation analysis, 40% offset barrier, rigid wall and the rigid pillar, was conducted in optimal Latin hypercube design and adaptive simulated annealing method, and the result was satisfactory.