|Table of Contents|

Dynamics performance of new type of fully automatic track inspection vehicle(PDF)

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

Issue:
2021年06期
Page:
194-208
Research Field:
载运工具运用工程
Publishing date:

Info

Title:
Dynamics performance of new type of fully automatic track inspection vehicle
Author(s):
CHANG Chao1;  LING Liang1;  SUN Yu2;  ZHAI Wan-ming1;  WANG Kai-yun1;  WANG Gui-dong3
(1. State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, Sichuan, China; 2. College of Transportation Science and Engineering, Nanjing Tech University, Nanjing 210009, Jiangsu, China;3. Chengdu Rail Transit Industry Technology Research Institute Co., Ltd., Chengdu 610031, Sichuan, China)
Keywords:
track inspection;  track inspection vehicle;  vehicle system dynamics;  wheel-rail contact stiffness;  Kik-Piotrowski method
PACS:
U216.3
DOI:
10.19818/j.cnki.1671-1637.2021.06.015
Abstract:
Dynamics numerical simulations of a track inspection vehicle were performed to precisely evaluate the dynamics performance of a new type of fully automatic intelligent track inspection vehicle. The nonelliptical multipoint contact Kik-Piotrowski algorithm was adopted for the wheel-rail contact. During the vehicle system modeling process, the factors such as the nonlinear suspension force elements and geometric nonlinear characteristics of the wheel-rail contact were considered, and the influence of vehicle-mounted equipment vibration was analyzed. For the unique structure of the wheel tread surface wrapped with high-hardness polyurethane, the finite element software ABAQUS was used to establish the wheel-rail local contact model. The Mooney-Rivlin rubber model was utilized to simulate the distinct properties of polyurethane, and the wheel-rail equivalent contact stiffness was calculated. The relevant parameters in the Kik-Piotrowski algorithm were corrected based on the finite element calculation results. The coupled vehicle-track rigid-flexible model was established using the Craig-Bampton modal synthesis method and the multibody dynamics software UM. To verify the accuracy of the simulation model, the real vehicle dynamics test was carried out. The vibration responses of the inspection vehicle under the working conditions of the straight line and 300 m small-radius curve at running speed of 10-30 km·h-1 were analyzed. Research results show that when the vehicle runs normally, the vertical maximum acceleration of the middle-vision module exceeds that of the left-vision module. Moreover, the lateral maximum acceleration is lower than that of the left-vision module, and the maximum acceleration of the frame exceeds the value of the vision module. The middle part of the frame is prone to vertical bending and deformation because of the rubber cushion at the installation position of the vision module. The track inspection vehicle runs satisfactorily along a straight line and the 300 m small-radius section. When the vehicle runs at 30 km·h-1 on the 300 m small-radius curve section, the maximum wheel-load reduction rate can reach 0.92, and the vibration response of the frame is relatively large. The inspection speed in the curve section should be controlled at approximately 20 km·h-1 to ensure the safety of vehicle-mounted equipment and prevent the vehicle derailment. 5 tabs, 24 figs, 31 refs.

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Last Update: 2021-12-20