列车制动过程踏面温度场及应力⁃应变分布特性

doi:10.13229/j.cnki.jdxbgxb.20211324

Abstract

Abstract:

In order to set the heat flux density， normal load， and tangential load using the rotational load method， as well as the contact heat transfer between the wheels and rails， convective heat transfer， and thermal radiation effects on the wheel surface， thermo-mechanical coupling simulation was used by secondary development of Abaqus. The temperature change curve model and thermal stress prediction model of the highest point of tread temperature during the braking process were provided. This was based on the dynamic changes and distribution characteristics of tread temperature， stress， and strain under various braking procedures. A quantitative relationship between the maximum temperature and the end temperature of the wheel tread and the parameters of braking conditions was obtained by regression. The findings indicate that： under braking conditions of 25 t， 100 km/h， and 0.7 m/s²， the radial stress reaches 625 MPa， the maximum tangential stress is -713 MPa， the maximum radial and tangential plastic strain is -5.47‰ and -3.37‰， respectively， the maximum thermal strain is 5.178‰， and the thermal stress range is 433 MPa. The maximum temperature of the tread is increased by approximately 90°C， 120°C， and 26°C.

Key words: mechanical design, braking, thermal-mechanical coupling, temperature field, stress field, strain field

CLC Number:

U211.5

Jian-feng SONG,Xin-lei HUANG,Shuai YI,Zhen-xi YANG,Yong-gang DONG,Shu-lin LI. Temperature field and stress-strain distribution of tread during train braking[J].Journal of Jilin University(Engineering and Technology Edition), 2023, 53(10): 2773-2784.

Figures/Tables 24

Table 1

CL60 wheel steel material parameters"

温度/ $℃$	抗拉强度 $/ M P a$	质量热熔/［J·（kg·℃^-1）］	导热率/［W·（m·℃^-1）］	热膨胀系数 $10 - 5 / ℃$	弹性模量 $/ G P a$	屈服强度 $/ M P a$
26	815	470	51	1.033	205	577
100	733	490	49	1.112	180	498
200	673	530	45	1.207	165	444
300	635	570	42	1.226	137	413
400	604	620	38	1.331	125	393
500	575	680	35	1.392	77	379

Table 1

Fig.1

Fig.2

Table 2

Relationships between m， n and β"

$β$	m	n
65	1.38	0.76
70	1.28	0.80
75	1.20	0.84
80	1.13	0.89
85	1.03	0.94
90	1.00	1.00

Table 2

Fig.3

Fig.4

Fig.5

Fig.6

Fig.7

Fig.8

Fig.9

Table 3

Table 4

L8192×71 horizontal array and maximum temperature and braking end temperature results at point C"

试验序号	因素			$T m a x$ /℃	$T e n d$ /℃	试验序号	因素			$T m a x$ /℃	$T e n d$ /℃	试验序号	因素			$T m a x$ /℃	$T e n d$ /℃	试验序号	因素			$T m a x$ /℃	$T e n d$ /℃
试验序号	$v 0$	$a c$	$t z$	$T m a x$ /℃	$T e n d$ /℃	试验序号	$v 0$	$a c$	$t z$	$T m a x$ /℃	$T e n d$ /℃	试验序号	$v 0$	$a c$	$t z$	$T m a x$ /℃	$T e n d$ /℃	试验序号	$v 0$	$a c$	$t z$	$T m a x$ /℃	$T e n d$ /℃
1	2	1	5	400.1	264.5	22	7	1	7	373.3	247.5	43	7	7	7	447.9	294.3	64	4	4	4	398.3	263.1
2	1	1	1	94.3	65.7	23	9	8	3	342.6	226.9	44	8	9	5	511.7	337.5	65	3	8	5	497.1	327.3
3	4	5	1	391.9	259.7	24	1	5	7	427.1	281.7	45	4	6	7	563.3	370.4	66	9	7	6	530.2	348.8
4	9	9	7	602.4	397.7	25	4	2	3	325.7	215.9	46	1	8	7	465.6	306.8	67	8	6	4	424.6	280.2
5	5	3	1	365.2	241.2	26	9	5	2	318.9	211.5	47	3	6	1	285.8	190.0	68	8	2	7	448.7	295.9
6	7	9	1	570.9	374.7	27	7	4	7	537.0	353.3	48	2	6	7	330.1	501.3	69	5	5	5	451.1	297.2
7	3	3	3	333.7	211.3	28	1	6	5	346.8	229.6	49	4	3	7	340.4	523.8	70	5	1	7	493.1	325.2
8	7	2	5	418.2	276.1	29	2	3	6	415.6	274.4	50	5	8	6	543.3	357.4	71	1	4	2	181.8	122.4
9	6	7	1	666.5	437.7	30	9	3	7	397.1	262.3	51	2	9	7	602.4	397.7	72	3	2	6	464.5	306.1
10	3	4	7	413.0	272.7	31	6	6	6	455.1	300	52	8	3	6	477.6	314.7	73	4	9	6	556.5	365.9
11	8	5	7	427.1	281.7	32	8	8	6	481.3	317.1	53	2	2	2	217.5	145.6	74	6	9	4	464.0	305.8
12	3	7	7	447.9	294.3	33	6	1	2	204.4	137.0	54	2	8	1	250.1	166.8	75	3	5	4	411.4	271.6
13	8	1	3	250.6	167.1	34	6	4	3	228.0	152.4	55	2	7	4	375.7	248.4	76	3	9	2	371.5	245.7
14	9	2	1	605.2	397.6	35	2	4	6	428.8	282.9	56	3	1	7	493.1	325.5	77	7	3	2	230.6	154.1
15	5	7	7	573.6	377.1	36	9	4	5	320.5	212.5	57	5	9	3	413.7	272.5	78	6	3	5	300.6	199.6
16	4	1	6	451.4	297.6	37	1	9	6	494.5	325.6	58	9	1	4	358.9	237.5	79	4	8	2	234.3	156.5
17	5	6	2	332.1	220.0	38	4	7	5	421.9	278.5	59	6	8	7	589.6	387.4	80	6	2	6	364.5	306.1
18	5	2	4	372.0	246.0	39	8	4	1	569.5	374.4	60	5	4	6	428.8	282.9	81	7	5	6	441.9	291.5
19	1	3	4	261.1	173.9	40	2	5	3	303.2	201.3	61	8	7	2	283.2	188.3
20	1	7	3	261.2	174.3	41	9	6	6	393.1	259.7	62	1	2	7	386.7	255.6
21	7	8	4	388.8	256.9	42	7	6	3	378.3	250.1	63	6	5	7	547.7	360.5

Table 4

Fig.10

Fig.11

Fig.12

Fig.13

Fig.14

Fig.15

Fig.16

Fig.17

Fig.18

Fig.19

Fig.20

References 20

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因素	水平
因素	1	2	3	4	5	6	7	8	9
制动初速度/（km·h^-1）	80	90	100	110	120	130	140	150	160
制动减速度/（m·s^-2）	0.50	0.55	0.60	0.65	0.70	0.75	0.80	0.85	0.90
轴重/t	20.0	22.5	25.0	27.5	30.0	32.5	35.0

Temperature field and stress-strain distribution of tread during train braking

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