新能源汽车齿轮-转子-轴承耦合传动系统非线性振动分析

Shuai Mo, Zhen Wang, Y. Zeng, Wei Zhang
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引用次数: 0

摘要

考虑时变啮合刚度、时变支承刚度、传动误差、齿侧间隙和轴承间隙的影响,建立了新能源汽车齿轮-转子-轴承耦合传动系统的非线性动力学模型。首先,采用四阶龙格-库塔积分法求解系统动力学微分方程,得到系统的时变啮合力图、时程图、相位图、FFT谱图、poincarcarcars图和分岔图,研究外部负载激励频率对系统动力学特性的影响。此外,采用多尺度法分析了系统的主共振特性,确定了系统的主共振稳定条件。采用数值方法分析了时滞控制参数和外部负载激励频率对系统主共振的影响。结果表明,新能源汽车齿轮-转子-轴承耦合传动系统具有明显的非线性特性,避免了系统失稳区间,合理选择外部负载激励频率、啮合阻尼、时滞参数和负载波动,可用于提高新能源汽车传动系统的稳定性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Nonlinear Vibration Analysis of the Coupled Gear-Rotor-Bearing Transmission System for a New Energy Vehicle
Considering the effects of time-varying meshing stiffness, time-varying support stiffness, transmission errors, tooth side clearance and bearing clearance, a nonlinear dynamics model of the coupled gear-rotor-bearing transmission system of a new energy vehicle is constructed. Firstly, the fourth-order Runge–Kutta integral method is used to solve the differential equations of the system dynamics, and the time-varying meshing force diagram, time history diagram, phase diagram, FFT spectrum diagram, Poincaré map and bifurcation diagram of the system are obtained to study the influence of the external load excitation frequency on the dynamics characteristics of the system. In addition, the multiscale method is used to analyze the main resonance characteristics of the system and to determine the main resonance stability conditions of the system. The effect of time lag control parameters and external load excitation frequency on the main resonance of the system is analyzed by numerical methods. The results show that the gear-rotor-bearing coupled transmission system of the new energy vehicle has obviously nonlinear characteristics, avoiding the system instability interval reasonable selection of external load excitation frequency, meshing damping, time lag parameters and load fluctuations, which can be used to improve the stability of the transmission system of the new energy vehicle.
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