Research on anti-roll performance of straddle monorail vehicle with air spring system

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Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (8) : 64-71.

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Research on anti-roll performance of straddle monorail vehicle with air spring system

ZHAO Zengchuang1,2，YANG Tian1，REN Lihui1，JI Yuanjin*1，ZHU Dongjin2

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Abstract

A four-point height control air spring system is used in the secondary suspension system of straddle monorail vehicle. When the monorail vehicle runs under unbalanced load, there is a pressure difference between the left and right air springs of the bogie. The anti-roll performance of monorail vehicle is obviously affected by the leveling valve and pressure-balancing valve of the air spring system. In this paper, the dynamic simulation model of straddle monorail vehicle including the thermodynamic model of air spring system was established. Firstly, the influence of the leveling valve and pressure-balancing valve of air spring system before and after opening on the anti-roll performance of the vehicle was simulated and analyzed. Secondly, the influence of the opening threshold value of pressure-balancing valve on the anti-roll performance of the vehicle was analyzed. The results show that the critical roll angle of straddle monorail vehicle with air spring system is about 50% of that without air spring system due to the influence of leveling valve; when the pressure-balancing valve is opened, the anti-roll performance of the vehicle is significantly adversely affected, and the vehicle is in an unstable oscillation state. In order to ensure the anti-roll performance of the vehicle, the opening threshold of the pressure-balancing valve should be higher than the pressure difference of the left and right air spring when the vehicle is in the critical roll angle state.

Key words

straddle monorail vehicle / air spring system / pressure-balancing valve / leveling valve / anti-roll performance

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ZHAO Zengchuang1, 2, YANG Tian1, REN Lihui1, JI Yuanjin1, ZHU Dongjin2. Research on anti-roll performance of straddle monorail vehicle with air spring system[J]. Journal of Vibration and Shock, 2025, 44(8): 64-71

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