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中南大学学报(自然科学版)

Journal of Central South University

第41卷    第6期    总第196期    2010年12月

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文章编号:1672-7207(2010)06-2444-07
轨道车辆切削式吸能过程仿真
常宁,刘国伟

(中南大学 交通运输工程学院 轨道交通安全教育部重点实验室,湖南 长沙,410075)

摘 要: 利用金属切削过程吸收能量的原理, 在金属切削研究和轨道车辆吸能研究的交叉领域内,提出一种利用切屑生成过程进行吸能并用于轨道车辆被动安全的新型切削式吸能装置。根据非线性动态模拟理论,利用显式有限元软件ANSYS/LS-DYNA对该切削式吸能装置的吸能过程进行三维仿真,得到该装置在撞击过程中能量吸收和切削力的时程曲线。研究结果表明:与现有吸能装置相比,切削式吸能装置可以在更短的时间内吸收撞击能量,而且吸能能力更强;切削式吸能装置具有更强的降低撞击力峰值的能力,而且撞击力到达第1个峰值的时间也有所延迟。

 

关键字: 轨道车辆;切削;吸能装置;显式有限元

Simulation for energy-absorbing process of railway vehicle in metal-cutting way
CHANG Ning, LIU Guo-wei

Key Laboratory of Traffic Safety on Track, Ministry of Education, School of Traffic & Transportation Engineering,
Central South University, Changsha 410075, China

Abstract:Using the theory of energy absorption in the metal-cutting process, a new-style energy-absorbing device in metal-cutting way utilizing the absorbing energy in the generating process of chips and using for passive safety device of railway vehicle was put forward in the cross research field between metal-cutting and railway vehicle energy absorption. Based on the non-linear dynamic simulation principle, the three-dimensional simulation for the energy-absorbing process of energy-absorbing device in metal-cutting way was carried out with explicit finite element software ANSYS/LS-DYNA. Absorbed energy and cutting force curve were obtained. The results show that compared with existing energy-absorbing device, proposed energy-absorbing device in metal-cutting way can absorb more collision energy in a shorter time, and energy-absorbing capacity is stronger; energy-absorbing device in metal-cutting way can well reduce the peak value of impact force, and it takes more time to reach the peak value.

 

Key words: railway vehicle; cutting; energy-absorbing device; explicit finite element

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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