Page 68 - 捷運技術 第35期

60 Tomonori Umebayashi Toshinori Kimura Hiroyuki Morimoto 陳立島 CRASHWORTHINESS ANALYSIS OF CK371

1、Scope

In accordance with the CK371 particular technical specification（PTS）requirements, the car
body structure crashworthiness analysis is summarized herein. The crashworthiness analysis is
performed using LSTC/LS-DYNA [1] time-dependent, large-deflection computer program, to grasp
the fuse deformation of six - car train set at the collision with another six - car train. PTS
requirements are the followings.

a. An analysis shall be conducted of an impact between one 6-car train with W4 loading moving
at 25 km/hr and one parked 6-car train with W1 and W4 loadings.

b. A structural mechanical “fuse” shall have a buckling strength less than 50 percent of the
column buckling strength of the main structure.

c. Further collapse shall cause full engagement of the adjoining car ends with deformation of its
fuse limited to the cab, and equipment locker area in the case of the non-cab car ends so that
passenger space is unaffected.

2、Analysis

2.1 Mass-spring model

To analyze the behavior in the case of collision between two train sets, where one six–car train
is parked and the other six– car train collides at a speed of 25 km/hr, a mass-spring model [2] of two
train is used. Spring of fuse and coupler are obtained from section 2-2 as shown below.

Table 2-1 shows that two cases are analyzed by LS-DYNA equation in order to investigate the
collision behavior.

CASE 1: Collision of a W4 (full loaded) Table 2-1 Calculation cases
loaded six – car train with a W1
(empty car) six–car train that is Train Condition
parked. CASE Moving car Parked car
Weight Velocity Weight Velocity
CASE 2: Collision of a W4 loaded six –car (km/h) (km/h)

train set with a W4 loaded six –car 1 W4 25 W1 0
train that is parked. 2 W4 25 W4 0

Compressive characteristic：2c Compressive characteristic ：1e Compressive characteristic：2c
A03
A02
B06
A04
B04
B05
A05
A01
B01
B03
A06
B02
40.0ton 34.9ton 39.1ton 39.1ton 34.9ton 40.0ton 62.2ton 57.1ton 61.3ton 61.3ton 57.1ton 62.2ton
T
T
M2
DM1
DM1
M2
T
M2
T
DM1
DM1
M2
(Wtotal=228ton、V 0 =0、μ＝0.12） (Wtotal=361.2ton、V 0 =25km/h、μ＝0）
Moving train
Parked train
Fig.2-1-1 Model and boundary condition of case 1
Fig. 2-3-1 Model and boundary condition of case 1

Compressive characteristic：2c Compressive characteristic ：1e Compressive characteristic：2c

A01 A02 A03 A04 A05 A06 B01 B02 B03 B04 B05 B06
DM1
M2
T
M2
M2
M2
DM1
T
DM1
DM1
T
T
62.2ton 57.1ton 61.3ton 61.3ton 57.1ton 62.2ton 62.2ton 57.1ton 61.3ton 61.3ton 57.1ton 62.2ton
Moving train
Parked train
(Wtotal=361.2ton、V 0 =0、μ＝0.12） (Wtotal=361.2ton、V 0 =25km/h、μ＝0）
Fig. 2-3-2 Model and boundary condition of case 2
Fig.2-1-2 Model and boundary condition of case 2