Multi-Objective Optimization of Crashworthiness of Shrink Tube Energy Absorption Structure

Author:

Zou Fan123,Yao Shuguang13

Affiliation:

1. School of Traffic & Transportation Engineering, Central South University, Changsha 410083, China

2. School of Intelligent Manufacturing and Mechanical Engineering, Hunan Institute of Technology, Hengyang 421002, China

3. Key Laboratory of Traffic Safety on Track, Ministry of Education, Central South University, Changsha 410083, China

Abstract

By means of material testing, truck testing and numerical simulation, the structural parameters of the shrink tube anti-climb device for high-speed trains were determined. The effects of cone angle, tube thickness, friction coefficient and axial length of the friction cone on the crashworthiness of the shrink tube were studied, and the main causes were analyzed. Using cone angle and tube wall thickness as input variables, and peak crush force, mean crash force and specific energy absorption as crashworthiness indexes, a proxy model was constructed using a radial basis function. The global response surface methodology was adopted to optimize the design of the shrink tube’s structural parameters. The results showed that the crashworthiness of the shrink tube was positively correlated with the cone angle, the thickness of the shrink tube and the friction coefficient, and the influence decreased successively, while the influence was negatively correlated with the axial length of the friction cone, which had the least influence. Through the optimized design, the peak force of the shrink tube increased by only 5.41%, while the specific energy absorption increased by 31.03%. Additionally, the mean force was closer to the technical requirements of 600 kN, and the crashworthiness was optimized.

Funder

National Key Research and Development Program of China

Publisher

MDPI AG

Reference44 articles.

1. Safety threshold of high-speed railway pier settlement based on train-track-bridge dynamic interaction;Chen;Sci. China-Technol. Sci.,2015

2. Crashworthiness analysis and multi-objective optimization of a commercial vehicle frame: A mixed meta-modeling-based method;Wang;Adv. Mech. Eng.,2018

3. Crashworthiness design of foam-filled bitubal structures with uncertainty;Fang;Int. J. Non-Linear Mech.,2014

4. Crashworthiness design for functionally graded foam-filled bumper beam;Xiao;Adv. Eng. Softw.,2015

5. Mean compressive stress constitutive equation and crashworthiness optimization design of three novel honeycombs under axial compression;He;Int. J. Mech. Sci.,2015

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3