基于MATLAB优化气动撑杆参数的发动机舱盖周边尺寸匹配精度改善研究  

Research on Improvement of the Dimension Matching Accuracy for Engine Hood Based on the MATLAB Optimization of Gas Spring’s Parameters

作　　者：林杰 高凯 赵虎 周强[2] 曹亚辉 柳超 Lin Jie;Gao Kai;Zhao Hu;Zhou Qiang;Cao Yahui;Liu Chao(Dongfeng Honda Automobile Co.,Ltd.,Wuhan 430056;Technical Center,Dongfeng Motor Corporation,Wuhan 430058)

机构地区：[1]东风本田汽车有限公司,武汉430056 [2]东风汽车公司技术中心,武汉430058

出　　处：《汽车工艺与材料》2023年第6期16-24,共9页Automobile Technology & Material

摘　　要：基于气动撑杆引起发动机舱盖变形而导致周边尺寸匹配精度不良的问题,通过CATIA三维虚拟装配模拟分析,利用MATLAB对气动撑杆安装参数进行数值优化计算,研究出合理的发动机舱盖气动撑杆设计参数,进行相应的设计变更,并进行实车装配效果验证,使发动机舱盖周边尺寸匹配精度控制在目标范围内。针对发动机舱盖气动撑杆设计参数的变化规律,可得出以下结论:气动撑杆安装位置越靠近发动机舱盖前部,越靠近车身后部,其弹力比a越大;气动撑杆安装位置越靠近发动机舱盖前部,越靠近车身前部,其行程S越大;在改善气动撑杆反力导致发动机舱盖变形问题上,应尽可能将撑杆安装在发动机舱盖内板的前部区域,以减小最大压缩力。In this paper,based on the poor dimension matching accuracy of engine hood caused by the deformation of gas springs acting on the hood,through the simulation analysis of CATIA three-dimensional virtual assembly,and using MATLAB to numerically optimize the installation parameters of gas springs,reasonable design parameters of gas spring were worked out,and then corresponding design changes were made,and the assembly effect on the real vehicle was verified,controlling the dimension matching accuracy of engine hood within the target range.For the design parameters’change law of the engine hood gas springs,the following conclusions can be drawn:(1)the more front gas springs are installed on the engine hood,and the more backward gas springs are installed on the vehicle body,the larger the elastic force ratio of gas springs is;(2)the more front gas springs are installed on the engine hood,and the more front gas springs are installed on the vehicle body,the larger its travel S is;(3)in order to improve the deformation problem of the gas springs acting on engine hood,the gas springs should be installed as front as possible on the engine hood,on account of reducing the maximum compressive force.

关 键 词：气动撑杆 参数优化 尺寸匹配精度 发动机舱盖 MATLAB数值计算 

分 类 号：U462.1[机械工程—车辆工程]