A Study on the Optimization of Suspension Characteristics for Improving Running Safety of Railway Vehicle

철도차량 주행안전성 향상을 위한 현가장치 최적화 연구

  • 이영엽 (한국철도공사 연구원) ;
  • 이희성 (서울산업대학교 철도차량시스템공학과)
  • Published : 2009.12.30

Abstract

A suspension is the most prior apparatus to decide vehicle's running safety and ride comfort, also the suspension stiffness is the most important parameter for the designing of the vehicle. Providing the strong stiffness with the primary suspension in order to improve the running safety with high speed, but it causes a problem with a curve running performance of a railway vehicle. Therefore, many studies deal with the optimal value of suspension stiffness. In this paper, we aim to optimize the suspension system to improve running safety by varying stiffness values of railway vehicle suspension. We have proceeded an analysis by design variables which are position, length, width, stiffness and damping coefficients of primary and secondary suspension to optimize the suspension characteristics. As a result of the optimization, we verified that the derailment coefficients of inside and outside of wheel are decreased in comparison with initial model.

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