Dynamic Train Vertical Sperling Index Evaluation Model Considering Wheel-Rail Contact Loss  

作　　者：LIU Yiling ZHANG Jingwei LIU Xuewen WANG Yansong ZHOU Yueting 刘怡伶;张经纬;刘学文;王岩松;周跃亭

机构地区：[1]School of Mechanical and Automotive Engineering,Shanghai University of Engineering Science,Shanghai 201620,China [2]School of Aerospace Engineering and Applied Mechanics,Tongji University,Shanghai 200092,China

出　　处：《Journal of Shanghai Jiaotong university(Science)》2024年第6期1103-1115,共13页上海交通大学学报(英文版)

基　　金：the National Natural Science Foundation of China(Nos.51675324,11972257 and 11832014);the Project of the Science and Technology Commission of Shanghai Municipality(No.19030501100);the Technical Service Platform for Vibration and Noise Testing and Control of New Energy Vehicles(No.18DZ2295900)。

摘　　要：In this study,a half-space 13-degree-of-freedom vehicle model,a double track model,and a train-bridge interaction model were integrated to form a combined people-train-rail-bridge interaction model to analyze the vertical Sperling index of the train body and passengers as realistically as possible.In this bigger,more complete,and novel model,the separation between the vehicle and bridge is considered.By comparing measured data and simulated results obtained using the proposed model with the Newmark-Beta algorithm,the effectiveness of the model was verified,and the results demonstrated that these two values were very close.Upon further numerical analysis,the dynamic responses of the train and the three equivalent human bodies at different train speeds were computed using the developed vehicle-structure dynamic analysis program with different abruptness values in the random rail irregularities.The results of these four dynamic responses revealed that the rail irregularities affected the vertical acceleration of the three equivalent human bodies and train,and the best Sperling index evaluation standard for the train was not fixed(as assumed when only considering the train body)but varied with the passenger position as the train traveled over irregularities.

关 键 词：equivalent mechanical model people-train-rail-bridge interaction Sperling index analysis massspring-damping theory 

分 类 号：U270[机械工程—车辆工程]