关键词: 混合动力汽车；动力系统；扭振；AMESim；仿真分析

Abstract: A multi-degree-of-freedom torsional vibration model is established for a hybrid electric vehicle with a three-cylinder engine and dual electric motors, based on the structural principle of the vehicle's powertrain system. Using the AMESim software, the inherent characteristics and excitation responses of the system are analyzed under different modes and typical working conditions. By inputting the model and system parameters, the inherent characteristics of the system and the torsional vibration effects of the failed parts are analyzed. Based on the analysis results, the parameters of the system's torsional vibration components are optimized. This paper not only provides a good reference for the analysis of failure caused by torsional vibration, but also provides direct guidance for torsional vibration design of hybrid electric vehicle powertrain systems.

Key words: Hybrid electric vehicle; Powertrain system; Torsional vibration; AMESim; Simulation analysis