Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : August 07, 2016 - August 10, 2016
The maintenance work on rail defects, especially rail corrugation, is very important for railway operation. Therefore, the study on the mechanism of the generation of rail corrugation is very helpful to make a maintenance plan. First of all, to investigate the generation situation of the rail corrugation, we measured the rail surface roughness in some curve sections. Secondly, in order to investigate the cause of the generation of rail corrugation, we conducted on-board measurement using commercial train with accelerometers installed on its axle-box. Finally, we executed vehicle dynamic simulation by means of multibody dynamics for verifying the influence of the track supporting stiffness involved the generation of the rail corrugation. As a simulation result, in the case of sleepers supported hard, the significant peak was seen in the frequency band that corresponded to the wavelength of the rail corrugation on high rail in the power spectrum of axle-box acceleration. On the other hand, in the case of sleeper supported soft, any peaks were not seen in the power spectrum. Therefore, we conclude that the track stiffness relates to the generation of the rail corrugation.
