Modeling and Analysis of Rigid Ring Coupling Model of Electric Wheel

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.

Key words:electric wheel; ring model; inherent characteristics; modal analysis; torque fluctuation