A Method of Ride Quality Contribution Analysis of Railway Vehicle

The vibration of railway carbody will eventually be transferred to passengers, which is generally measured by the vehicle ride quality index method. Therefore, the dynamic performance of the train is a representation of the vibration property of the train. The decrease of the modal vibration will affect the smoothness of the train. Modal parameters are the basic technical parameters of the dynamic performance of the car body, which reflects the overall property of the process, assembly, suspension components, and component inertia, and these can be identified by experimental design and testing. There is a certain relationship between the modal parameters and the running stability, but only the specific size can be obtained through the calculation of the ride quality index. A contribution analyze method of running stability was present by calculating the deformation of the car body under frequency response and the index of running stability. Comparing with the modal contribution, the modal with the highest contribution is taken as the main variable to improve the ride quality of the vehicle body for design or optimization. Results shows that at 120 km/h, the bounce vibration of the model is the main cause of the peak acceleration around 1.18 Hz, contributing to 91%. The contribution of modal is obtained to verify the calculation results of the contribution of running stability. The results show that the modal frequency and modal shape are the same in the sixth-order floating-rigid-body model. Then the bouncing vibration frequency was adjusted by optimizing the stiffness of secondary suspension system and the amplitude has been reduced by 44% at 1.18 Hz.

Language

  • English

Media Info

  • Media Type: Web
  • Features: References;
  • Pagination: pp 221-226
  • Monograph Title: ICRT 2021: Second International Conference on Rail Transportation

Subject/Index Terms

Filing Info

  • Accession Number: 01840812
  • Record Type: Publication
  • ISBN: 9780784483886
  • Files: TRIS, ASCE
  • Created Date: Mar 29 2022 9:32AM