Sensitivity Analysis of the Elastic Properties of Rail Vehicle Suspensions on Vibration Based on the HXN5 Locomotive Model

Abstract

The dynamic performance of suspensions plays direct role in vibration control of railway vehicles and also has great impact on the ride comfort and operation stability. For assessment of the influence, a method of sensitivity analysis was performed, in which a Multi-Body System (MBS) dynamic model for the HXN5 locomotive counting for significant DOFs and nonlinearities was developed in SIMPACK platform and validated by real tests. More than tens of dynamic simulations were performed by a variety of damping and stiffness coefficients of the primary and secondary suspensions. By simulation, it is found that the vertical stiffness and damping of the primary suspension have the most sensitive influence. The lateral stiffness of the primary suspension, the longitudinal and lateral stiffness as well as the longitudinal and vertical damper of the secondary suspension possess the least effect on the railway locomotive vibration characteristics. It is also shown parameters of the longitudinal stiffness of the primary suspension, the vertical stiffness and lateral damper of secondary suspensions are of intermediate influence.

Sensitivity analysis of suspension parameters on dynamic performance of a rail vehicle based on a virtual prototype response surface method model

“…Yang et al 6 established the sensitivity analysis model of suspension parameters on vertical acceleration and vertical Sperling index of a rail vehicle, using the vehicle random vibration frequency domain analysis method. Zhou et al 7 assessed the sensitivity of suspension parameters on a rail vehicle dynamic performance, using tens of dynamic simulations in multi-body system. Suarez et al 8 assessed the influence of the elastic properties of rail vehicle suspensions on the vehicle dynamic behavior, using 144 dynamic simulations in a rail vehicle dynamic model.…”