基于 AMEsim 的汽车动力传动系统扭转振动分析及参数优化

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摘要为研究某前置后驱 MPV 车型存在的传动系统扭转振动问题，基于 AMEsim 软件建立21 自由度传动系统扭转振动当量模型，通过自由振动计算以及强迫振动计算对建立的模型进行扭振分析ꎮ对车辆进行传动系统扭转振动测试，将仿真结果与实验结果进行对比，分别在模态频率以及扭振响应两个方面验证仿真模型的准确性ꎮ在建立的汽车传动系统模型基础上，通过灵敏度分析对模型中的转动惯量、扭转刚度以及阻尼进行分析，得到的结论表明六个系统参数对传动系统的影响较大ꎮ对这些参数采用基于 Matlab 遗传算法的多参数调整，调整后变速器和主减速器处的扭振幅值分别减小了20.16%和23%，较大程度的削减了传动系统的扭振幅值ꎮ

关键词汽车动力传动系统扭转振动 AMEsim遗传算法

中图分类号 TB533+.2TP391.9

AbstractIn order to study the torsional vibration problem of the transmission system of a front-rear-drive MPV model ， a 21-degree-of-freedom transmission system torsional vibration equivalent model was established based on AMEsim software ， and the torsional vibration analysis of the established model was carried out through free vibration calculation and forced vibration calculation . The torsional vibration test of the vehicle transmission system is carried out ， the simulation results are compared with the experimental results ， and theaccuracy of thesimulation model is verified in two aspects ： Modal frequency and torsional vibration response . Based on the established vehicle transmission system model ， the moment of inertia ， torsional stiffness and damping in the model are analyzed through sensitivity analysis . The conclusions obtained show that the six system parameters have a greater impact on the transmission system.The multi-parameter adjustment based on MATLAB genetic algorithm is adopted for these parameters . After adjustment ， the torsion amplitude values at the transmission and final reducer are reduced by 20.16% and 23% respectively ， which greatly reduces the torsion amplitude of the transmission system.

Key wordsAutomotive powertrain;Torsional vibration;AMEsim;Genetic algorithm

Corresponding author ： DONG XiaoChen ，E-mail ： dongxiaochen2020@163.com

The project supported by the National Natural Science Foundation of China （ No .51605134）.

Manuscript received 20201127 in revised form 20210115.

引言

随着汽车性能的不断提高，人们对于汽车的乘坐舒适性提出了更高的要求ꎮ因此汽车NVH （ Noise 、Vibration、Harshness ）越来越受到人们的重视ꎮ其中汽车动力传动系统的扭转振动问题作为一个主要问题显得十分突出，成为了引起汽车结构振动和噪声的主要根源之一。（剩余7112字）