期刊名称：Advances in Science and Technology Research Journal
印刷版ISSN：2080-4075
电子版ISSN：2299-8624
出版年度：2021
卷号：15
期号：4
页码：110-117
DOI：10.12913/22998624/142034
语种：English
出版社：Society of Polish Mechanical Engineers and Technicians
摘要：Based on the theory of friction self-excited vibration and the measured data of rail corrugation, the cause of rail corrugation in metro straight section was analyzed. Then, using the stochastic fi nite element method, the sensitivity of each parameter to rail corrugation was studied by selecting the elastic modulus E1 and density ρ1 of the wheelrail material, the elastic modulus E2 and density ρ1 of the track slab material, the wheel-rail coeffi cient of friction f, the fastener vertical stiff ness K and vertical damping C, the wheel-rail longitudinal relative slip s as the random parameters. The results show that under the support of Cologne egg fastener track, the characteristic frequency of friction self-excited vibration of wheel-rail system is close to the characteristic frequency of measured corrugation, indicating that the occurrence of rail corrugation is related to the friction self-excited vibration of wheel-rail system under the condition of saturated creep force. The parameter sensitivity analysis illustrates that the infl uence degree of each random parameter on the real part αi of complex eigenvalue is E1 > ρ1 > C > E2 > ρ2 > f > K > s in turn. E1, C and s are positively correlated with the real part αi of complex eigenvalue, while the remaining 5 parameters are negatively correlated with the real part αi of complex eigenvalue. Therefore, appropriate decrease of E1, C and s, and increase of ρ1, E2, ρ2, f and K can play a positive role in the control of rail corrugation.
关键词：metro;rail corrugation;friction self-excitation;stochastic fi nite element;sensitivity analysis
