电动轮刚性环耦合特性模型建模与分析

Modeling and Analysis of Rigid Ring Coupling Model of Electric Wheel

摘要:

为进行电动轮高频转矩激励下的振动响应分析，基于刚性环轮胎模型假设，考虑轮辋与轮毂电机弹性连接关系建立了电动轮刚性环耦合特性模型.通过电动轮工作模态试验对模型主要刚度参数进行了识别，并结合胎面参数分析了模型的固有特性.所建立的电动轮模型能够准确描述胎面径向一阶平移频率和周向旋转频率，且考虑轮辋与轮毂电机连接柔性改变了原有的轮胎环、轮辋固有频率分布，可以避开原有峰值频率.根据电动轮轮毂电机实测激励频率特征，对所建立的电动轮刚性环耦合特性模型进行了相应频率的转矩激励.分析表明，考虑轮辋与轮毂电机间弹性连接耦合特性关系，能够减小原有电动轮一阶径向平移频率附近的轮胎与车身的振动加速度响应，为电动轮结构设计提供理论指导意义.

Abstract:

The rigid ring coupling model of electric wheel with the consideration of the flexible connection between rim and drive motor was established to analyze the vibration responses of the electric wheel with the high frequency torque input. And the main stiffness parameters were identified through the operating modal analysis of the electric wheel. With the calculated tread parameters, the inherent characteristic of the established tire model was analyzed. The electric wheel model had the ability to represent the first order modal of both the radial and rotational directions exactly. And the flexible connection between the rim and motor changed the inherent frequencies of the tire ring and the rim. The torque excitation of the frequencies acquired from the drum test was brought to the electric wheel model. The responses show that the flexible connection between the rim and the motor could decrease the vibration response of the tire and car body at the frequencies nearby the first order radial frequency. This research offers the theoretical guide for the structural design of the electric wheel.