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 vert...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.展开更多
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)。
文摘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.
