关键词: 非线性, 高速曳引电梯, 滚动接触, 振动

Abstract: Guide rollers installed on high-speed traction elevator to make it run steadily have nonlinear rate-dependent characteristic, which induces the elevator vibration when it is stimulated by the roller roundness tolerance and the guide rail irregularity. According to the Kalker’s simplified theory of three-dimensional Hertzian rolling contact, the contact model of guide roller-rail is set up and the expressions of the contact stiffness in three directions are derived to calculate the normal Hertzian force and the tangential creep force. The irregularity excitation between guide roller and rail is fitted by taking the roller roundness tolerance and the rail profile irregularity into account. The system dynamic equations of high-speed traction elevator are constructed. Using Newmark method, the vibration behavior of a high-speed traction elevator is analyzed. Compared with the practical measurement results both in time and frequency domain, the calculated results are in good agreement, which means that the system dynamic model of high-speed traction elevator based on guide roller-rail contact model is valid. Therefore the proposed model can be used to predict the vibration response of high-speed traction elevator.

Key words: High-speed traction elevator, Nonlinear, Rolling contact, Vibration