电动越野摩托车后悬架硬点优化及强度分析  

Hard-Point Optimization and Strength Analysis of Electric Motocross Rear Suspension

作　　者：冉险生[1] 王鹏 徐小刚 余思洁 RAN Xiansheng;WANG Peng;XU Xiaogang;YU Sijie(School of Mechatronics&Vehicle Engineering,Chongqing Jiaotong University,Chongqing 400074,China;Chongqing Zongshen Innovation Technology Research Institute Co.,Ltd.,Chongqing 400054,China)

机构地区：[1]重庆交通大学机电与车辆工程学院,重庆400074 [2]重庆宗申创新技术研究院有限公司,重庆400054

出　　处：《重庆交通大学学报（自然科学版）》2024年第12期111-117,共7页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：重庆市技术创新与应用发展专项面上项目(cstc2020jscx-msxmX0161)。

摘　　要：针对电动越野摩托车在飞坡工况下三角连杆硬点受力过大导致连接处的螺栓弯曲和衬套断裂问题,制定了基于多连杆后悬架系统硬点坐标优化方案。首先建立了整车模型以及三角连杆刚柔耦合模型,模拟分析了摩托车在坡道为1m下的动态强度响应,得到了三角连杆硬点位置受力和应力,通过道路试验验证了仿真模型的准确性;然后以三角连杆硬点位置的受力为优化目标,硬点坐标为设计变量,采用NSGA-Ⅱ遗传算法完成了多连杆后悬架系统的多目标优化。结果表明:优化之后三角连杆与平叉连接处受力大幅降低,减震与三角连杆连接处受力降低,三角连杆与拉杆连接处受力大幅降低,三角连杆最大应力降低,制作样件进行了实验验证了优化方案的可靠性。In view of the problem of bolt bending and bushing fracture at the joint caused by excessive force on the hard point of the triangle link of electric motocross under the flying slope condition,an optimization scheme of the hard point coordinates of the multi-link rear suspension system was formulated.Firstly,the whole vehicle model and the rigid-flexible coupling model of the triangular connecting rod were established.The dynamic strength response of the motorcycle on the ramp with 1m slope was simulated and analyzed,the force and stress at the hard point of the triangular connecting rod were obtained,and the accuracy of the simulation model was verified by road tests.Then,the multi-objective optimization of the multi-link rear suspension system was completed by using the NSGA-Ⅱ genetic algorithm,which took the force at the hard point position of the triangular connecting rod as the optimization target and the hard point coordinates as the design variable.The results show that after optimization,the force at the junction between the triangle connecting rod and the flat fork is greatly reduced,the force at the connection between the shock absorber and the triangle connecting rod is reduced,the force at the connection between the triangle connecting rod and the tie rod is greatly reduced,and the maximum stress of the triangle connecting rod is reduced.The reliability of the optimization scheme was verified by the experiment of the sample production.

关 键 词：车辆工程 电动越野摩托车 多连杆后悬架 刚柔耦合模型 硬点优化 NSGA-Ⅱ遗传算法 

分 类 号：U483[交通运输工程—载运工具运用工程] TP391[交通运输工程—道路与铁道工程]