【摘要】 针对摩托车在行驶过程中的俯仰振动和垂向振动问题，提出了一种基于多连杆后悬架系统硬点坐标的优化方案，通过优化原型车上后悬架系统的关键硬点，提高摩托车的行驶平顺性；建立摩托车整车模型，通过路试试验验证了仿真模型的准确性；以车身质心俯仰振动角加速度均方根值和垂向振动加权加速度均方根值最小化为优化目标，以多连杆悬架系统硬点的坐标为设计变量，采用NSGA-Ⅱ遗传算法完成多连杆后悬架系统的多目标优化。结果表明，优化后整车俯仰振动角加速度均方根值降低了24.0%,垂向振动加权加速度均方根值降低了39.2%,提高了摩托车的行驶平顺性，具有重要的工程应用价值。更多还原

【Abstract】 Aiming at the pitch vibration and vertical vibration problems of motorcycles during driving, an optimization scheme based on the hard point coordinates of the multi-link rear suspension system was proposed. The ride comfort of the motorcycle was improved by optimizing the key hard points of the rear suspension system on the prototype vehicle. A complete motorcycle model was established, and the correctness of the simulation model was verified by road test. The optimization goal was to minimize the RMS value of the pitch acceleration and the RMS value of the vertical weighted acceleration of the body center of mass. Taking the coordinates of the hard points of the multi-link suspension system as design variables, the multi-objective optimization of the multi-link rear suspension system was completed by using the NSGA-Ⅱ genetic algorithm. The results show that after the optimization, the RMS value of the pitch acceleration of the whole vehicle is reduced by 24.0% and the RMS value of the vertical weighted acceleration is reduced by 39.2%, which improves the riding comfort of the motorcycle and has important engineering application value.更多还原