关键词: 虚拟环境, 汽车引擎盖, 有限元分析, 多目标优化

Abstract: Based on the virtual environment of finite element analysis，a virtual model for the automobile hood matching was constructed to study the matching process in automobile manufacturing and assembly． The influence of gravity and the deformation of elastic adjusting elements on the matching process was clarified through the com-parative analysis of different mechanical factors and the sensitivity analysis of the parameters of the adjusting ele-ments． And the sensitivity of the adjusting elements’parameters to the position deviation of each reference point was obtained． Finally，a fast adjustment strategy for the automobile hood matching considering the deformation of gravity and elastic adjustment elements was proposed by combining the analysis results and the multi-objective opti-mization method． The strategy was successfully applied to the virtual matching of automobile hood，and the simula-tion and experimental results show that this strategy can effectively reduce the cost of adjustment assembly and im-prove the adjustment efficiency．

Key words: virtual environment, automobile hood, finite element analysis, multi-objective optimization