为研究双质量飞轮（dual mass flywheel，DMF）对整车传动系扭振的影响，基于DMF理论搭建了仿真模型，并通过试验台架测试了DMF在不同振幅工况下的扭转刚度特性。通过不同工况下迟滞曲线仿真和试验对比，验证了DMF仿真模型的精度。基于准确的DMF模型，搭建了传动系扭振仿真模型，并通过整车状态怠速和3挡节气门全开工况的仿真和试验转速波动对标，验证了传动系扭振模型的精度。通过DMF设计参数的灵敏度分析，研究了传动系扭振开发和DMF设计的匹配。结果显示，DMF能衰减70%~90%的发动机燃烧主阶次转速波动幅值，极大降低扭振问题发生的风险。

To investigate the influence of the dual-mass flywheel (DMF) on the vehicle driveline torsion vibration, a DMF simulation model was built based on DMF theory analysis. The torsion stiffness characteristics of the DMF were measured under various amplitudes. The simulated and measured hysteresis cycle curves were then correlated. Subsequently, a driveline torsion vibration simulation model was developed using the correlated DMF model. The simulated and measured rotating speed fluctuation were compared under idle and 3^rd gear wide open throttle (WOT) conditions. Sensitivity analysis of the DMF design parameters was conducted to study the matching design of driveline torsion vibration and DMF parameters. The results indicated that the DMF reduced rotating speed fluctuation amplitudes by 70% to 90% at the engine combustion main order frequencies, thereby decreasing the risk of torsion vibration issues.

TB532

国家重点研发计划资助项目（2020YFB1709400）。