Study on the Evaluation Methods of the Vertical Ride Comfort of Railway Vehicle—Mean Comfort Method and Sperling’s Method

Applied Sciences

Mădălina Dumitriu¹  DragoșIonuț Stănică² 

[1] Department of Railway Vehicles, University Politehnica of Bucharest, 060042 Bucharest, Romania;Doctoral School of Transport, University Politehnica of Bucharest, 060042 Bucharest, Romania;

关键词: railway vehicle;    ride comfort;    mean comfort method;    Sperling’s method;    frequency weighting;    numerical simulation;   

DOI  :  10.3390/app11093953

来源: DOAJ

【 摘 要 】

The paper herein analyzes the ride comfort at the vertical vibrations of the railway vehicle, evaluated by two methods—mean comfort method and Sperling’s method. The two methods have in common that the estimation of the comfort sensation is conducted with the comfort indices, namely ride comfort index N_MVZ and ride comfort index W_z. The values of these indices are derived from numerical simulations. The advantage of using the results of the numerical simulations versus using experimental results, on which most previous research is based, resides in the fact that the ride comfort indices can be examined while taking into account the influence of velocity and certain parameters altering the behavior of vertical vibrations of the carbody, i.e., carbody flexibility and the suspension damping. The numerical simulation applications have been developed based on a theoretical model of the vehicle that considers important factors affecting the behavior of vertical vibrations of the carbody, by means of a ‘flexible carbody’ type model and an original model of the secondary suspension. The results presented mainly show that the two assessment methods lead to significantly different outcomes, in terms of ride comfort, under identical running conditions of the vehicle.

【 授权许可】

Unknown