【摘要】 【目的】行星齿轮传动系统动力学特性研究虽已取得丰富成果，但现有研究多聚焦直齿结构，针对混合动力商用车电子控制无级变速器（Electronic Continuously Variable Transmission, ECVT）所用的斜齿行星齿轮系统的动力学研究仍存在理论缺口。为解决ECVT行星齿轮传动系统的振动问题，开展了深入研究。【方法】以发动机直驱模式为研究工况，综合考虑啮合相位差、时变啮合刚度及齿侧间隙等非线性因素，构建了24自由度集中参数解析模型；运用龙格-库塔数值求解法获取了系统各构件在x、y、z方向的振动位移、动态啮合力等动态参数的时域响应，结合快速傅里叶变换分析了其频域特性。【结果】研究表明，在行星齿轮传动系统中，太阳轮轴向振动位移均值最为突出，其余构件振动特性呈规律性分布；系统内、外动态啮合力数值显著，反映出较高的齿面承载负荷。通过搭建ECVT台架试验平台，模拟实际工况采集振动信号，验证了理论分析模型的有效性与可靠性。研究成果可为混合动力商用车ECVT行星齿轮传动系统的结构优化设计、振动特性改善提供参考。更多还原

【Abstract】 [Objective] Although abundant achievements have been made in the dynamic characteristics research of planetary gear transmission systems, existing studies mostly focus on straight-tooth structures, leaving a theoretical gap in the dynamic research of helical planetary gear systems used in electronic continuously variable transmissions(ECVT) for hybrid commercial vehicles. To address the vibration issues of the planetary gear transmission system in ECVT, in-depth research was conducted. [Methods] Taking the engine direct-drive mode as the research condition, a 24-degree-of-freedom(24-DOF) lumped parameter analytical model was constructed by comprehensively considering nonlinear factors such as meshing phase difference, time-varying meshing stiffness, and tooth side clearance. The Runge-Kutta numerical solution method was used to obtain the time-domain responses of dynamic parameters such as vibration displacements in the x, y, z directions and dynamic meshing forces of each component in the system. The frequency-domain characteristics were analyzed combined with fast Fourier transform. [Results] The study shows that in the planetary gear transmission system, the mean value of the axial vibration displacement of the sun gear is the most prominent, and the vibration characteristics of the remaining components show regular distribution. The values of internal and external dynamic meshing forces in the system are significant, reflecting high tooth surface bearing loads. By building an ECVT test bench platform to simulate actual working conditions and collect vibration signals, the effectiveness and reliability of the theoretical analysis model are verified. The research results can provide reference for the structural optimization design and vibration characteristic improvement of the planetary gear transmission system in ECVT for hybrid commercial vehicles.更多还原