张亚辉

个人信息Personal Information

教授

博士生导师

硕士生导师

性别:男

毕业院校:大连理工大学

学位:博士

所在单位:力学与航空航天学院

学科:工程力学. 动力学与控制. 计算力学

办公地点:综合实验1号楼505

电子邮箱:zhangyh@dlut.edu.cn

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Non-stationary random vibration of a coupled vehicle-slab track system using a parallel algorithm based on the pseudo excitation method

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论文类型:期刊论文

发表时间:2013-05-01

发表刊物:PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART F-JOURNAL OF RAIL AND RAPID TRANSIT

收录刊物:SCIE、EI

卷号:227

期号:F3

页面范围:203-216

ISSN号:0954-4097

关键字:Vehicle-slab track interaction; random vibration; pseudo excitation method

摘要:A parallel algorithm based on the pseudo excitation method (PEM) is applied to investigate the non-stationary random response of a vertically coupled vehicle-slab track system subjected to random excitation induced by track irregularity. The vehicle is simplified as a multibody system with 10 degrees of freedom and the slab track is represented by a three layer Bernoulli-Euler beam model which includes the rail, slab and roadbed. Linear wheel-rail contact provides interaction between the vehicle and slab track models. The track irregularity is assumed to be a Gaussian random process with zero mean value and the non-stationary random response of the coupled vehicle-slab track system is solved using a combination of PEM and step-by-step integration. A parallel algorithm based on PEM is used to accelerate the computation and the effectiveness of the proposed method is verified by the Monte Carlo method. The basic random performance of the coupled vehicle-slab track system is analysed and the effects of the vehicle speed and slab track parameters on the random responses of the vehicle and slab track are investigated. The results indicate that the vehicle speed has a significant effect on the random response of the coupled vehicle-slab track system and that the rail pad parameters are the most important of the slab track parameters discussed.