A holistic topology and parameter lightweight design method for the tailgate of a new energy vehicle was proposed by combining injection-molded long glass fiber-reinforced(LGF)polymer composite.The co-simulation models and conventional simulation models were established for the per-formance simulation and optimization design of the tailgates respectively,to improve simulation accu-racy and optimization efficiency.Firstly,the composite tailgate structures were optimized and rede-signed by three steps structural conceptal design based on conventional simulation models.Secondly,co-simulation models were established for subsequent multi-objective optimization and verified by sample production and performance tests.Finally,the elitist non-dominated sorting genetic algorithms(NSGA-Ⅱ)were used to optimize the rib thicknesses,key position thicknesses,and cross-sectional dimensions of the tailgates in detail.The mass of optimized composite tailgates is reduced by 27.2％compared to original steel tailgates,and the torsional stiffness,transverse stiffness,bending stiff-ness,and free mode of the tailgates meet the application requirements.
关键词
长玻纤增强复合材料/尾门/联合仿真/概念设计/参数优化
Key words
long glass fiber-reinforced(LGF)polymer composite/tailgate/co-simulation/con-ceptal design/parameter optimization
维普
万方数据