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Design and topology optimization of air conditioning suspension bracket for metro.

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Title: Design and topology optimization of air conditioning suspension bracket for metro.
Authors: Xiao Q; School of Mechanical and Electrical and Vehicle Engineering, East China Jiaotong University, Nanchang, Jiangxi, China., Guo WN; School of Mechanical and Electrical and Vehicle Engineering, East China Jiaotong University, Nanchang, Jiangxi, China., Yang LT; School of Mechanical and Electrical and Vehicle Engineering, East China Jiaotong University, Nanchang, Jiangxi, China., Zhou ST; School of Mechanical and Electrical and Vehicle Engineering, East China Jiaotong University, Nanchang, Jiangxi, China., Chen DY; School of Mechanical and Electrical and Vehicle Engineering, East China Jiaotong University, Nanchang, Jiangxi, China.
Source: Science progress [Sci Prog] 2020 Oct-Dec; Vol. 103 (4), pp. 36850420980617.
Publication Type: Journal Article
Language: English
Journal Info: Publisher: SAGE Publications Country of Publication: England NLM ID: 0411361 Publication Model: Print Cited Medium: Internet ISSN: 2047-7163 (Electronic) Linking ISSN: 00368504 NLM ISO Abbreviation: Sci Prog Subsets: PubMed not MEDLINE; MEDLINE
Imprint Name(s): Publication: <2019-> : [London] : SAGE Publications
Original Publication: Oxford, Blackwell Scientific Publications [etc.]
Abstract: During the operation of subway vehicles, the vibration of air conditioning units is mainly transmitted to the vehicle body through the suspension support, which seriously affects the stability and comfort of the vehicle during operation. Therefore, the design and optimization of the suspension support of air conditioning units has become a hot topic in the research of the dynamic characteristics of subway vehicles. In this paper, the rigid and flexible coupling dynamic model of metro is firstly calculated to simulate the stress of the suspension point of air conditioning of the vehicle body when the vehicle is running. The initial structure design of the suspension support is carried out, and the stress of the air conditioning suspension point is taken as the load input to analyze the stiffness and strength of the initial structure of the suspension support. Then, the fatigue life is taken as the topology constraint, and the variable density method (SIMP) is used to optimize the topology of the suspension bracket. Finally, the optimized suspension support is validated. The results show that after topological optimization, the maximum displacement and maximum stress of the suspension support under vertical, horizontal, and vertical loads are reduced by 80%, 93%, and 99%, respectively, compared with the original structure model, and the maximum stress under vertical loads is reduced by 50%.
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Contributed Indexing: Keywords: Metro vehicles; suspension support; topology optimization/fatigue life; variable density method (SIMP)
Entry Date(s): Date Created: 20201222 Latest Revision: 20230827
Update Code: 20250114
PubMed Central ID: PMC10450889
DOI: 10.1177/0036850420980617
PMID: 33350334
Database: MEDLINE
Description
Abstract:During the operation of subway vehicles, the vibration of air conditioning units is mainly transmitted to the vehicle body through the suspension support, which seriously affects the stability and comfort of the vehicle during operation. Therefore, the design and optimization of the suspension support of air conditioning units has become a hot topic in the research of the dynamic characteristics of subway vehicles. In this paper, the rigid and flexible coupling dynamic model of metro is firstly calculated to simulate the stress of the suspension point of air conditioning of the vehicle body when the vehicle is running. The initial structure design of the suspension support is carried out, and the stress of the air conditioning suspension point is taken as the load input to analyze the stiffness and strength of the initial structure of the suspension support. Then, the fatigue life is taken as the topology constraint, and the variable density method (SIMP) is used to optimize the topology of the suspension bracket. Finally, the optimized suspension support is validated. The results show that after topological optimization, the maximum displacement and maximum stress of the suspension support under vertical, horizontal, and vertical loads are reduced by 80%, 93%, and 99%, respectively, compared with the original structure model, and the maximum stress under vertical loads is reduced by 50%.
ISSN:2047-7163
DOI:10.1177/0036850420980617