Vertical Track Irregularity Influence on the Wheel High-Frequency Vibration in Wheel-Rail SystemReportar como inadecuado




Vertical Track Irregularity Influence on the Wheel High-Frequency Vibration in Wheel-Rail System - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Mathematical Problems in Engineering - Volume 2016 2016, Article ID 5082319, 13 pages -

Research ArticleChina Academy of Railway Sciences, Beijing 100081, China

Received 1 February 2016; Revised 14 July 2016; Accepted 18 July 2016

Academic Editor: Muhammad N. Akram

Copyright © 2016 Yang Lei et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A three-dimensional deformable finite element model of wheel-rail system is established. The vertical vibration natural frequencies are calculated by modal analysis. The improved central difference method by ABAQUS explicit nonlinear dynamics module is chosen to calculate the vertical vibration of wheel axle. Through the vibration measurement experiment of wheel by China Academy of Railway Sciences, the contact parameter is optimized and the model is modified. According to the nonlinear simulation results, the important influence of vertical track irregularity on the wheel set high-frequency vibration is discovered. The advantage frequencies through spectrum are close to the vertical vibration natural frequencies of seventh, eighth, ninth, and tenth mode. When the velocity is 350 km-h, system’s nonlinear dynamic characteristic is higher than the results at 200 km-h. The critical wavelength of vertical track irregularity on the wheel vertical vibration is about 0.8 m. In addition, a particular attention should be paid to one situation that the main dominant frequency amplitude is more than 50% of the acceleration amplitude even if the peak acceleration is low.





Autor: Yang Lei, Xinyu Tian, Falin Qi, Dongsheng Chen, and Tian Tian

Fuente: https://www.hindawi.com/



DESCARGAR PDF




Documentos relacionados