Journal of Jilin University(Engineering and Technology Edition) ›› 2020, Vol. 50 ›› Issue (1): 147-155.doi: 10.13229/j.cnki.jdxbgxb20180942

Previous Articles    

Simulation analysis and evaluation on passive safety of the longitudinal berth

Xin TONG1(),Le-le ZHANG1(),Wen LIU1,Hong-jun KANG2   

  1. 1. School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
    2. Product R&D Center, Tangshan Railway Vehicle Co. , Ltd. , Tangshan 063035, China
  • Received:2018-09-14 Online:2020-01-01 Published:2020-02-06
  • Contact: Le-le ZHANG E-mail:16121401@bjtu.edu.cn;llzhang1@bjtu.edu.cn

RICH HTML

 2   

PDF (PC)

130

Abstract:

The longitudinal berth is designed with a central aisle and double-deck berth units on both sides. With relatively independent longitudinal berths, the passengers lie parallel with the train’s running direction. In collision accidents, compared with the transversal berth, and the kinematic responses of dummies reflect the passive safety protection performance of structures. Analyzing the characteristics of the longitudinal berth in the structural design of a passenger interface, the finite element models of typical collision scenes with dummies were established according to a passive safety evaluation method for a passenger interface based on the anthropomorphic simulation test. The simulation was carried out with the standard load as the boundary condition. The passive safety protection of the structure to occupants was evaluated by analyzing kinematic responses and injury parameters, and compared with 25T transversal berth. The results indicate that, in the longitudinal berth, under forward load, the head and neck injury indexes of the dummies exceed the standard criterion values (HIC 15 is 626 and Nij is 2.5). Under the backward load, the peak femur compressive force reaches 6.4 kN, which exceeds the criterion value. Due to fundamental changes in the structural design, dummies in the longitudinal and transversal berths can’t avoid secondary impacts and have different injuries. The longitudinal berth restrains occupants more effectively and reduces the risks of injury in secondary impacts.

Key words: vehicle operation engineering, passive safety, secondary impact, longitudinal berth, simulation

CLC Number: 

  • U298.2

Fig.1

"

Table 1

Comparison between longitudinal and transversal berth"

卧铺类型 定员/人 床铺层数 铺位长度/mm 铺位宽度/mm
新型纵向 60 2 1950 715
25T横向 36 2 1900 700

Fig.2

Passive safety evaluation method for a passenger interface"

Fig.3

Collision scenario of longitudinal berth"

Fig.4

Collision scenario of transversal berth"

Fig.5

Standard pulse"

Table 2

Finite element model"

车厢模型 单元数/节点数 部件、结构 实际材料 材料模型编号
纵向卧铺 88890/83169 床垫、靠背、枕头 聚氨酯泡沫 MAT_057: LOW_DENSITY_FOAM
地板、侧墙等 7003铝合金

MAT_003: PLASTIC_KINEMATIC

MAT_020:RIGID
隔断等 酚醛玻璃钢
横向卧铺 235838/235523 餐桌 —

MAT_001:ELASTIC

MAT_020:RIGID
床等 —

Table 3

7003 aluminum alloy and phenolic FRP"

材 料

密度/

（kg?m-3）

 杨氏模量/GPa 泊松比 屈服强度/MPa 切线模量/GPa
7003铝合金 2700 63.1 0.33 — —
酚醛玻璃钢 2000 10 0.29 100 0.26

Fig.6

Stress-strain curve of polyurethane foams"

Table 4

Element number of dummy model"

假人姿态 壳单元 体单元 梁单元 弹簧单元 质量单元
卧姿 1606 2644 3 8 32

Fig.7

Contact stiffness of table and berth"

Fig.8

"

Fig.9

"

Fig.10

Tibia moment and force of No.2 dummy"

Table 5

Injury parts of dummy"

车厢类型 载荷方向 假人编号

碰撞接

触部位

 接触部位数量

超过限

值部位
纵向卧铺 正向 1 头部 1 头部、颈部
反向 2 脚部 1 腿部
横向卧铺 正向 3 头、胸、四肢 3 胸部
4 头、胸、四肢 3 头部、胸部
5 胸、四肢 2 —
6 四肢 1 —

Table 6

Comparison between injury threshold and injury value"

损伤指标 标准值 纵向卧铺 25T横向卧铺
1号 2号 3号 4号 5号 6号
头部 最大3 ms加速度/g 80 128.4 41.3 40.6 266.2 51.3 33.7
H I C 15 500 626 36 186 1 910 177 157
颈部 最大向前弯曲力矩/（N·m） 310 124.2 16.4 77.1 11.6 11.3 12.7
最大向后弯曲力矩/（N·m） 135 63.3 9.8 60.5 10.6 11.8 10.1
最大拉力/kN 4.17 0.3 0.1 1.3 1.2 0.4 0.4
最大压力/kN 4 15.1 3.8 0.6 0.3 1.0 0.2
N i j 1 2.5 0.6 0.6 0.3 0.2 0.1
胸部 最大3 ms加速度/g 60 57.2 16.4 153.5 78.9 29.9 17.7
最大压缩量/mm 63 2.8 1.9 6.2 10.8 4.2 4.7
VC 1 0.1 0.1 0.4 0.6 0.2 0.3
CTI 1 0.7 0.2 1.8 1.0 0.3 0.2
腿部 左侧股骨最大轴向压缩力/kN 4.3 0.8 6.3 2.7 2.1 0.2 0.5
右侧股骨最大轴向压缩力/kN 4.3 0.8 6.4 2.8 1.9 0.2 0.5
左侧胫骨最大轴向压缩力/kN 8 0.8 7.3 2.2 2.5 0.3 0.5
右侧胫骨最大轴向压缩力/kN 8 0.8 7.5 2.3 2.2 0.2 0.6
左侧胫骨指数TI 1.3 0.4 0.9 0.8 0.7 0.4 0.3
右侧胫骨指数TI 1.3 0.4 0.9 0.3 0.6 0.2 0.3

Fig.11

Contact stiffness of partition structure"

1 雷成, 肖守讷, 罗世辉, 等 . 轨道车辆耐碰撞性研究进展[J]. 铁道学报, 2013, 35(1): 31-40.
Lei Cheng , Xiao Shou-ne , Luo Shi-hui , et al . State-of-the-art research development of rail vehicles crashworthiness[J]. Journal of the China Railway Society, 2013, 35(1): 31-40.
2 Carvalho M , Ambrosio J , Milho J . Implications of the inline seating layout on the protection of occupants of railway coach interiors[J]. International Journal of Crashworthiness, 2011, 16 (5): 557-568.
3 Okino Tomohiro , Kazuma Nakai , Junichi Takano , et al . Research of passenger’s safety sitting on the typical Japanese transverse seat in the event of a level crossing accident[C]∥The 11th International Symposium Passive Safety of Rail Vehicles. Berlin: Verlag des IFV BAHNTECHNIK e. V.,2017
4 Wei Liang , Zhang Le-le . Evaluation and improvement of crashworthiness for high-speed train seats[J]. International Journal of Crashworthiness, 2018, 23(5): 561-568.
5 Rail Safety and Standards Board . GM/RT 2100 issue five requirements for rail vehicle structures[M]. England London: Derby Rail Safety and Standards Board, 2012.
6 黄俊辉 . 可变编组动车组设计[M]. 北京：中国铁道出版社，2015.
7 黄志其, 尹志民, 陈慧, 等 . 7003-T6铝合金挤压型材在线热处理工艺研究[J]. 轻合金加工技术, 2012, 40(2): 38-41.
Huang Zhi-qi , Yin Zhi-min , Chen Hui , et al . On line process technology research of 7003-T6 aluminum alloy profile[J]. Light Alloy Fabrication Technology, 2012, 40(2): 38-41.
8 Menchawi M , Almgren L . Modeling of fiberglass reinforced epoxy composites in LS-DYNA[D]. Sweden: College of Mechanical Engineering, Linköpings University, 2014.
9 高江华 . 乘员-坐垫系统垂向动力学建模与分析[D].北京：清华大学汽车工程系, 2014.
Gao Jiang-hua . Modeling and analysis on the vertical dynamics of an occupant and seat cushion system[D]. Beijing: Automobile Engineering Department, Tsinghua University, 2014.
10 Xie S , Tian H . Dynamic simulation of railway vehicle occupants under secondary impact[J]. Vehicle System Dynamics, 2013, 51(12): 1803-1817.
11 王存义, 张乐乐, 卫亮, 等 . 基于坐姿假人的地铁乘员二次碰撞损伤影响分析[J]. 铁道学报, 2015, 37(3): 14-22.
Wang Cun-yi , Zhang Le-le , Wei Liang , et al . Analysis of second impact on passenger injuries in a subway vehicle based on sitting dummy[J]. Journal of the China Railway Society, 2015, 37(3): 14-22.
[1] Wei-min ZHUANG,Hong-da SHI,Dong-xuan XIE,Guan-nan YANG. Thickness distribution of adhesive layer in dissimilar clinch⁃adhesive hybrid joint with steel and aluminum alloy [J]. Journal of Jilin University(Engineering and Technology Edition), 2020, 50(1): 100-106.
[2] Fang-wu MA,Li-wei NI,Liang WU,Jia-hong NIE,Guang-jian XU. Position and attitude closed loop control of wheel⁃leggedall terrain mobile robot [J]. Journal of Jilin University(Engineering and Technology Edition), 2019, 49(6): 1745-1755.
[3] Wei-min ZHUANG,Yang LIU,Peng-yue WANG,Hong-da SHI,Ji-shuan XU. Simulation on peeling failure of self⁃piercing riveted joints insteel and aluminum alloy dissimilar sheets [J]. Journal of Jilin University(Engineering and Technology Edition), 2019, 49(6): 1826-1835.
[4] Wei-ping SHI,Xu ZHAO,Xing-jun HU,Tian-ming YU,Bo-wen LIU,Yan DUAN. Design and numerical simulation of water restriction device AICD for natural gas exploitation [J]. Journal of Jilin University(Engineering and Technology Edition), 2019, 49(6): 1986-1991.
[5] Xin CHEN,Xin-jian RUAN,Ming LI,Ning WANG,Jia-ning WANG,Kai-xuan PAN. Application of modified discrete scheme based onlarge eddy simulation [J]. Journal of Jilin University(Engineering and Technology Edition), 2019, 49(6): 1756-1763.
[6] Ya-feng GONG,Bo WANG,Guo-jin TAN,Li-min ZHANG,Wen-ding WU,Hai-peng BI. Comparative analysis of mechanical characteristics of two typical fabricated culverts in Jilin [J]. Journal of Jilin University(Engineering and Technology Edition), 2019, 49(6): 1865-1870.
[7] Xiu-quan LU,Chun-yu HU,Ya-long CHAI,Wen-xing MA,Jian-nan ZHANG. Analysis of transient flow field characteristics of large-scale hydrodynamic coupling under speed regulation [J]. Journal of Jilin University(Engineering and Technology Edition), 2019, 49(5): 1539-1546.
[8] Zhuo YI,Wen-zhi FU,Ming-zhe LI. Numerical simulation and experiment on double⁃layered split ultrahigh pressure die [J]. Journal of Jilin University(Engineering and Technology Edition), 2019, 49(5): 1593-1599.
[9] Xin LI,Yan-peng SUN,Dan WANG,Jun-xu CHEN,Zheng-wei GU,Hong XU. Finite element numerical simulation for automobile front floor forming [J]. Journal of Jilin University(Engineering and Technology Edition), 2019, 49(5): 1608-1614.
[10] Bo ZHANG,Jian-wei ZHANG,Kong-hui GUO,Hai-tao DING,Hong-qing CHU. Current control of permanent magnet synchronous motor for road feeling simulation [J]. Journal of Jilin University(Engineering and Technology Edition), 2019, 49(5): 1405-1413.
[11] Hui YE,Yan-rong ZHU,Yong-feng PU. Numerical simulation of strain rate effect of fiber reinforced composites [J]. Journal of Jilin University(Engineering and Technology Edition), 2019, 49(5): 1622-1629.
[12] Zhao⁃wei QU,Zhao⁃tian PAN,Yong⁃heng CHEN,Peng⁃fei TAO,Di SUN. Car⁃following model with improving safety distance based on optimal velocity model [J]. Journal of Jilin University(Engineering and Technology Edition), 2019, 49(4): 1092-1099.
[13] Xin CHEN,Ming LI,Xin⁃jian RUAN,Ning WANG,Jia⁃ning WANG. Investigation of vortical structures in wake of Ahmed body by delayed detached⁃eddy simulation turbulence model using immersed boundary method [J]. Journal of Jilin University(Engineering and Technology Edition), 2019, 49(4): 1034-1042.
[14] Hua ZHOU,Zhi⁃gang YANG,Hui ZHU. Aerodynamic calculation of MIRA model correlated with wind tunnel test [J]. Journal of Jilin University(Engineering and Technology Edition), 2019, 49(4): 1043-1053.
[15] Dong⁃liang CHEN,Rui ZANG,Peng DUAN,Wei⁃peng ZHAO,Xu⁃tao WENG,Yang SUN,Yi⁃peng TANG. Biomimetic design of multi⁃link fishbone based on crescent′s fishtail propulsion theory [J]. Journal of Jilin University(Engineering and Technology Edition), 2019, 49(4): 1246-1257.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
Copyright © Journal of Jilin University(Engineering and Technology Edition), All Rights Reserved.
Tel: +86-431-85095297　Fax: +86-431-85094074　E-mail: xbgxb@jlu.edu.cn
Powered by Beijing Magtech Co. Ltd