Numerical Simulation Study on Longitudinal Impact of Vehicle under Shunting Condition

doi:10.3901/JME.2016.04.126

Abstract

Abstract: According to longitudinal load characteristics of draft gear and center bowl assembly in the longitudinal direction, the vehicle shunting impact model are built by Matlab software to study different axle load wagons, different stiffness and damping, different braking resistance conditions and different impact patterns on longitudinal impulses. The results show as followsWith gross weight of China railway wagon improving, longitudinal inertia forces of draft gear and center bowl assembly both increase. The buffer with convex type of resistance characteristic can absorb more impact energy and meet more widely shunting operation, and the lower carbody structure stiffness and connection stiffness between carbody and bogie both contribute to reduce longitudinal impulses. Besides under the braking condition vehicle velocities attenuate more quickly, but under which higher coupler and center bowl forces appeared, too. Last but not least, coupler and center bowl forces vary significantly with different impact patterns, the maximum coupler force occurs in the shunting condition of 3 loaded cars to 3 loaded cars while the maximum center bowl force occurs in the shunting condition of 3 loaded cars to 1 empty car.

Key words: center bowl, coupler force, draft gear, longitudinal impact, railway wagon, shunting operation

CLC Number:

U270

YANG Liangliang, LUO Shihui, FU Maohai, ZHOU Shangshu, ZENG Wenchang. Numerical Simulation Study on Longitudinal Impact of Vehicle under Shunting Condition[J]. Journal of Mechanical Engineering, 2016, 52(4): 126-132.

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