|Table of Contents|

Anti-overturning capacity of straddling monorail vehicle based on factor model(PDF)

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

Issue:
2020年02期
Page:
66-76
Research Field:
载运工具运用工程
Publishing date:

Info

Title:
Anti-overturning capacity of straddling monorail vehicle based on factor model
Author(s):
WANG Chao-ran;  JI Yuan-jin;  REN Li-hui
(Institute of Rail Transit, Tongji University, Shanghai 201804, China)
Keywords:
vehicle engineering;  anti-overturning capacity;  factor model;  straddling monorail;  factor weight;  anti-overturning coefficient
PACS:
U270.1
DOI:
10.19818/j.cnki.1671-1637.2020.02.006
Abstract:
Aiming at the characteristic that factors affecting the anti-overturning capacity of straddling monorail vehicle are numerous and complicated, a comprehensive evaluation method of vehicle anti-overturning capacity was proposed, and the sensitivities of influencing parameters were analysed based on the thought of dimensionality reduction. From the definitions of height of buoyancy center, flexibility coefficient and critical roll angle, the calculation methods for the three indexes of straddling monorail vehicle were deduced, and the differences of three indexes were discussed. Thirteen quantifiable anti-overturning factors were comprehensively proposed. Based on the test and simulation data, the anti-overturning factor model of straddling monorail vehicle was built, and the five main factors and influence weights of parameters were calculated. The anti-overturning coefficient was proposed to comprehensively evaluate the anti-overturning capacity of straddling monorail vehicle, and its convenient calculation method was obtained. The vehicle-track parameterized dynamics model was established based on the multibody dynamics software Universal Mechanism to verify the accuracies of parameter weights and evaluation indexes. Research result indicates that the height of buoyancy center, flexibility coefficient and critical roll angle of straddling monorail vehicle can reflect the anti-overturning capacity of vehicle to some extent, but they cannot reflect the parameter sensitivity. The contact state between the stabilizing wheel and the track beam surface significantly affects the anti-overturning capacity of straddling monorail vehicle. When one side of the stabilizing wheel departs from the track surface, the anti-overturning capacity of vehicle decreases by about 50%. The five main factors affecting the anti-overturning capacity of vehicle are the stabilizing wheel, the second suspension, the lateral span, the first suspension and the car body. Reducing the vertical position of stabilizing wheel and the centroid position of car body and increasing the pre-load of horizontal wheel and the lateral span of running wheel, can effectively improve the anti-overturning capacity of straddling monorail vehicle. 6 tabs, 9 figs, 30 refs.

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Last Update: 2020-05-22