|Table of Contents|

Flexibility characteristics of suspension system for railway vehicle

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2014年04期
Page:
45-52
Research Field:
载运工具运用工程
Publishing date:

Info

Title:
Flexibility characteristics of suspension system for railway vehicle
Author(s):
SHI Huai-long;  WU Ping-bo;  ZENG Jing;  ZHANG Da-fu
State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, Sichuan, China
Keywords:
railway vehicle;  bogie;  suspension system;  flexibility coefficient;  theoretical analysis and test
PACS:
U270.3
DOI:
-
Abstract:
A mathematical model of a railway vehicle equipped with air springs was built, the theoretical formulas of flexibility coefficient for suspension system were deduced, and the effects of suspension parameters on the coefficient were studied. Gravity method, angle measuring method and acceleration measuring method were designed to measure the coefficient. Gravity method was applied to measure the coefficients of motor car and trailer under different super-elevation and loading conditions respectively. Theoretical analysis result shows that the greater the stiffness and lateral distance of suspension system are, and the lower the centers of gravity for carbody and frame are, the smaller the flexibility coefficients are, which can improve the anti-overturning performance of vehicle. Test result illustrates that the coefficient of trailer is greater than that of motor car with a difference of 0.021 under unloading condition, but little divergence under loading condition. The coefficient under loading condition is greater than the coefficient under unloading condition with a maximum divergence of 0.109, and the severe situation occurs under loading condition for trailer with the maximum value of 0.245. The coefficient increases with the increase of super-elevation of outer rail, and the greater the super-elevation is, the more rapid the coefficient increases, which means that the flexibility should be controlled seriously for large super-elevation track. The credibility of theoretical analysis is verified and validated by test result, and the obtained formulas are reasonable and include comprehensive suspension parameters. 3 tabs, 10 figs, 16 refs.

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Last Update: 2014-08-30