Variable Stiffness Design and Multiobjective Crashworthiness Optimization for Collision Post of Subway Cab Cars

This paper proposes a variable stiffness collision post (VSCP) structure based on a uniform stiffness collision post (USCP) structure and performs stiffness matching optimization for VSCPs. A collision post structure assembled in a subway front-end frame can maintain the living space and absorb a ce...

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Autores principales:	Wei Guo, Ping Xu, Zhaofeng Yi, Jie Xing, Hui Zhao, Chengxing Yang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	collision post structure variable stiffness design grey relational analysis multiobjective optimization dynamic crash experiment subway cab cars Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/9ec867dd2d104c5791f46e4bb3705b09
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id	oai:doaj.org-article:9ec867dd2d104c5791f46e4bb3705b09
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spelling	oai:doaj.org-article:9ec867dd2d104c5791f46e4bb3705b092021-11-25T18:11:59ZVariable Stiffness Design and Multiobjective Crashworthiness Optimization for Collision Post of Subway Cab Cars10.3390/machines91102462075-1702https://doaj.org/article/9ec867dd2d104c5791f46e4bb3705b092021-10-01T00:00:00Zhttps://www.mdpi.com/2075-1702/9/11/246https://doaj.org/toc/2075-1702This paper proposes a variable stiffness collision post (VSCP) structure based on a uniform stiffness collision post (USCP) structure and performs stiffness matching optimization for VSCPs. A collision post structure assembled in a subway front-end frame can maintain the living space and absorb a certain amount of the kinetic energy of an impact. The experiment was applied on USCP, and the finite element model was verified experimentally. To investigate the effects of the stiffness parameters of VSCP on the specific energy absorption response (SEA_VSCP) and the area of intrusion response (S_In), response surface models fitted from design of experiment were adopted with the finite element model. In addition, a multiobjective optimization design was realized by using the global response search method and a Pareto frontier sequence was generated, which was based on the developed response surface model. It was found that the optimal value of SEA_VSCP and S_In responses cannot be achieved at the same time. Finally, a grey relational analysis is propounded to attain a desirable balance between SEA_VSCP and S_In from the Pareto frontier sequence under constraints of the peak crash force of VSCP and energy absorption of the front-end of cab car. The optimization result shows that the crashworthiness of VSCP is better than that of USCP.Wei GuoPing XuZhaofeng YiJie XingHui ZhaoChengxing YangMDPI AGarticlecollision post structurevariable stiffness designgrey relational analysismultiobjective optimizationdynamic crash experimentsubway cab carsMechanical engineering and machineryTJ1-1570ENMachines, Vol 9, Iss 246, p 246 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	collision post structure variable stiffness design grey relational analysis multiobjective optimization dynamic crash experiment subway cab cars Mechanical engineering and machinery TJ1-1570
spellingShingle	collision post structure variable stiffness design grey relational analysis multiobjective optimization dynamic crash experiment subway cab cars Mechanical engineering and machinery TJ1-1570 Wei Guo Ping Xu Zhaofeng Yi Jie Xing Hui Zhao Chengxing Yang Variable Stiffness Design and Multiobjective Crashworthiness Optimization for Collision Post of Subway Cab Cars
description	This paper proposes a variable stiffness collision post (VSCP) structure based on a uniform stiffness collision post (USCP) structure and performs stiffness matching optimization for VSCPs. A collision post structure assembled in a subway front-end frame can maintain the living space and absorb a certain amount of the kinetic energy of an impact. The experiment was applied on USCP, and the finite element model was verified experimentally. To investigate the effects of the stiffness parameters of VSCP on the specific energy absorption response (SEA_VSCP) and the area of intrusion response (S_In), response surface models fitted from design of experiment were adopted with the finite element model. In addition, a multiobjective optimization design was realized by using the global response search method and a Pareto frontier sequence was generated, which was based on the developed response surface model. It was found that the optimal value of SEA_VSCP and S_In responses cannot be achieved at the same time. Finally, a grey relational analysis is propounded to attain a desirable balance between SEA_VSCP and S_In from the Pareto frontier sequence under constraints of the peak crash force of VSCP and energy absorption of the front-end of cab car. The optimization result shows that the crashworthiness of VSCP is better than that of USCP.
format	article
author	Wei Guo Ping Xu Zhaofeng Yi Jie Xing Hui Zhao Chengxing Yang
author_facet	Wei Guo Ping Xu Zhaofeng Yi Jie Xing Hui Zhao Chengxing Yang
author_sort	Wei Guo
title	Variable Stiffness Design and Multiobjective Crashworthiness Optimization for Collision Post of Subway Cab Cars
title_short	Variable Stiffness Design and Multiobjective Crashworthiness Optimization for Collision Post of Subway Cab Cars
title_full	Variable Stiffness Design and Multiobjective Crashworthiness Optimization for Collision Post of Subway Cab Cars
title_fullStr	Variable Stiffness Design and Multiobjective Crashworthiness Optimization for Collision Post of Subway Cab Cars
title_full_unstemmed	Variable Stiffness Design and Multiobjective Crashworthiness Optimization for Collision Post of Subway Cab Cars
title_sort	variable stiffness design and multiobjective crashworthiness optimization for collision post of subway cab cars
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/9ec867dd2d104c5791f46e4bb3705b09
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_version_	1718411513642876928

Variable Stiffness Design and Multiobjective Crashworthiness Optimization for Collision Post of Subway Cab Cars

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