Simulation analysis of MT-2 buffer capacity requirements based on shunting conditions

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (13) : 210-216.

SUN Linping1, YANG Zhongliang1,2, MA Weihua1, LUO Shihui1, WANG Bo1

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Abstract

In order to analyze the capacity requirement of MT-2 draft gear during shunting operation, the longitudinal impact dynamic model of railway freight car is established based on the nonlinear mechanical characteristics of friction buffer and the characteristics of vehicle shunting impact force. And the capacity demand of MT-2 draft gear under different vehicle mass, different speed , different grouping methods and different body stiffness during shunting operation is analyzed. The results show that the work value of the draft gear is proportional to the vehicle mass and the square of the speed. When the number of the impact vehicle and the number of the impacted vehicle are both greater than 2, the capacity demand of the buffer on the impact surface will be independent of the number of vehicles. The demand value of draft gear capacity considering mass, speed, grouping and body stiffness is fitted by function, and the proportional coefficient , and is solved. n the impact between different number of vehicles, the buffer work value of different couplers is different. The buffer work value of the coupler number on the impact surface is the largest, and gradually decreases along the coupler number before and after the impact. The stiffness of the car body should not be considered when calculating the capacity demand value during the impact of shifting, and the buffer capacity demand of the impact surface should be taken as the standard when the heavy car impacts the heavy car mode.

Key words

Shunting impact / MT-2 draft gear / Coupling force / Capacity requirements / Heavy duty truck

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SUN Linping1, YANG Zhongliang1,2, MA Weihua1, LUO Shihui1, WANG Bo1. Simulation analysis of MT-2 buffer capacity requirements based on shunting conditions[J]. Journal of Vibration and Shock, 2024, 43(13): 210-216

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