The Prediction and Analysis of Lift Car - Hoist Rope Vibration Interactions

摘要

This paper was presented at ELEVCON BEIJING 2005, the International Congress on Vertical Transportation Technologies and first published in IAEE book "Elevator Technology 15", edited by A. Lustig. It is a reprint with permission from the international Association of Elevator Engineers iaee (website: www.elevcon.com). This paper is an exact reprint and has not been edited by ELEVATOR WORLD. A lift car suffers from vibrations transmitted from the suspension and compensating ropes as well as from vibrations caused by the irregularities of the guide system. Ride quality is particularly affected by lateral vibration caused by the excitation due to the guide rail alignment errors and irregularities at the rail joints. The frequency of this excitation depends on the car speed and the rail length. An adverse situation arises when the frequency of the rail excitation approaches the fundamental natural frequencies of the car - hoist rope system. In this paper, the guide rail excitation mechanism is discussed and its influence on car ride quality and hoist rope response is predicted using modelling and numerical simulation techniques. Subsequently, the simulation results are presented and analysed.