|Table of Contents|

Optimization design on suspension parameters of equipment mounted under car body via analytical target cascading method(PDF)

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

Issue:
2021年06期
Page:
321-
Research Field:
载运工具运用工程
Publishing date:

Info

Title:
Optimization design on suspension parameters of equipment mounted under car body via analytical target cascading method
Author(s):
HE Xiao-long1; 2;  CHEN Jie3;  E Shi-ju1;  TANG Da-yong2;  ZHANG Li-min4
(1. Key Laboratory of Urban Rail Transit Intelligent Operation and Maintenance Technology and Equipment of Zhejiang Province, Zhejiang Normal University, Jinhua 321005, Zhejiang, China; 2. School of Intelligent Manufacturing Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, China; 3. School of Mechanical Engineering, Shandong University, Jinan 250061, Shandong, China; 4. State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, Sichuan, China)
Keywords:
high-speed train;  multi-objective optimization;  analytical target cascading method;  suspension parameter;  comfort index;  vibration index
PACS:
U270.11
DOI:
10.19818/j.cnki.1671-1637.2021.06.026
Abstract:
To improve the running comfort in high-speed trains and reduce the vibration of the equipment mounted under the car body, a vertical dynamics model was constructed for the vehicle-equipment system, and a frequency response function related to the vibration acceleration of vehicle system was derived. The root-mean-square of vibration acceleration of the equipment mounted under the car body was calculated using a function for the track irregularity excitation spectrum. The vertical running comfort indices were calculated for the car body reference points by applying a human comfort weighting filter function. The analytical target cascading(ATC)method was used to hierarchically decompose the vibration indices of vehicle-equipment system to construct a two-level index decomposition mathematical model for the vehicle-equipment system. An exponential penalty function strategy was used to coordinate the interlevel coupling problems in the vibration indices. A multi-objective optimization method was developed to maximize the running comfort of vehicle and minimize the vibration acceleration of equipment mounted under the car body, and an optimization model for the stiffness and damping of the equipment mounted under the car body was constructed. The efficacy of the ATC method for the parameters optimization in complex vehicle systems was investigated via a comparison with the design method of dynamic vibration absorber(DVA). Analysis results show that compared with the design method of DVA, during the operation at 300 km·h-1, the optimization by the ATC method improves the running comfort at the vehicle center by 8.5% and decreases the equipment vibration level by approximately 20%. Over the full range of operating speeds, the vibration attenuation of ATC method is twice as that of DVA design method for the vehicle center, and 4.5 dB better for the equipment. Compared with the unoptimized state, the ATC method improves the running comfort at the vehicle center by a maximum of 15% and reduces the equipment vibration acceleration by 0.18 m·h-2. Therefore, the ATC method can be used for the optimization design of structure parameters in complex railway vehicles to significantly reduce the vibration level in vehicle systems, and is also a guidance for the parameters optimization design of the equipment mounted under car body. 2 tabs, 10 figs, 30 refs.

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Last Update: 2021-12-20