基于路况识别及素材谱的汽车用户路线疲劳损伤获取研究

doi:10.19562/j.chinasae.qcgc.2024.08.018

Abstract

Abstract:

In order to identify and obtain the automotive structure fatigue damage of user route， the concepts of ‘element spectrum’ and ‘survey vehicle’ are proposed， and a convenient method for obtaining fatigue damage of automotive structure of user route based on road condition identification， classification and element spectrum is proposed. Firstly， the mathematical model of IRI （International Roughness Index） is established to identify the road grade and the method of identifying the user's road surface grade through the simple sensor scheme is established. And the correlation and independence between vehicle speed and IRI are studied. Subsequently， the method for determining the road classification and mileage distribution of the survey vehicle for user route based on IRI and vehicle speed is proposed. Then， combined with the element spectrum and unit mileage damage collected locally by the full-channel vehicle， the fatigue damage of the vehicle structure on the user's route is finally calculated efficiently. Thereby， the solution of ‘element spectrum + survey vehicle’ to identify the total damage of user route is created. The verification results are good， indicating that the technology and method studied is operable， exact and effective.

Key words: damage, user, road surface, IRI, element spectrum, survey vehicle

Liang Su,Daojun Wu,Quanquan Chen. Study on Calculation of Customer Vehicle Fatigue Damage Based on Road Condition Identification and Element Spectrum[J].Automotive Engineering, 2024, 46(8): 1520-1528.

Figures/Tables 23

序号n	车速/（km·h^-1）	等级	$G q (n 0)$	IRI/（m·km^-1）
1	25	A	4	1.99
2		B	8	3.83
3		C	16	8.40
4	30	A	4	1.75
5		B	8	3.50
6		C	16	7.34
7	40	A	4	1.54
8		B	8	3.11
9		C	16	6.51
10	50	A	4	1.34
11		B	8	2.77
12		C	16	5.75
13	60	A	4	1.23
14		B	8	2.59
15		C	16	5.41
16	70	A	4	1.22
17		B	8	2.46
18		C	16	5.24

等级标准值	IRI/（m·km^-1）	等级上限	等级限值 $I R I +$ /（m·km^-1）
A	1.6	A+	2.26
B	3.2	B+	4.52
C	6.4	C+	9.05
…	…	…	…

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路面等级	G_q （n₀）/（10^-6m³）
A	16
B	64
C	256
D	1 024
…	…

序号	车速/ （km·h^-1）	IRI/ （m·km^-1）	IRI识别的等级	道路模拟PSD 验证识别等级
路段1	32.0	2.0	A	A
路段2	30.0	3.9	B	B
路段3	28.4	6.0	C	C
路段4	35.0	1.2	A	A
路段5	33.1	3.1	B	B

路段	目标车速/ （km·h^-1）	IRI/ （m·km^-1）	IRI均值/ （m·km^-1）	IRI与均值的比值	IRI 标准差	变异系数/%
物流园公路	10	3.96	3.79	1.05	0.26	6.8
	25	3.44		0.91
	30	3.42		0.90
	40	3.91		1.03
	50	3.86		1.02
	60	3.95		1.04
开发区大道	10	3.41	3.41	1.00	0.16	4.6
	25	3.26		0.96
	30	3.36		0.99
	40	3.68		1.08
	50	3.49		1.02
	60	3.27		0.96
城市干线	10	1.66	1.61	1.03	0.11	6.8
	25	1.78		1.11
	30	1.50		0.93
	40	1.68		1.04
	50	1.51		0.94
	60	1.54		0.96

...	...	...	...	...	...	...
B10	B20	B30	B40	B50	B60	...
A10	A20	A30	A40	A50	A60	...

二维划分区间	IRI/ （m·km^-1）	u/ （km·h^-1）	应变测点1	应变测点2	应变测点3	应变测点4	应变测点5	应变测点6
...	...	...	...	...	...	...	...	...
B60	3.19	60	1.99E-07	1.11E-05	5.00E-06	1.06E-06	1.09E-08	5.63E-07
B50	3.19	50	5.54E-07	1.60E-05	3.92E-06	1.29E-06	2.54E-08	9.55E-07
B40	3.19	40	2.98E-07	1.07E-05	2.86E-06	1.42E-06	2.85E-08	9.56E-07
B30	3.19	30	9.72E-08	3.41E-06	4.29E-07	4.29E-07	9.42E-09	1.87E-07
B20	3.19	20	9.42E-08	2.59E-06	3.45E-07	4.44E-07	7.76E-09	1.78E-07
B10	3.19	10	2.20E-08	1.19E-06	6.57E-08	1.21E-07	2.39E-09	5.59E-08
...	...	...	...	...	...	...	...	...
A60	1.6	60	5.91E-08	3.19E-07	8.01E-08	2.56E-08	7.25E-10	1.40E-08
A50	1.6	50	6.28E-08	1.77E-06	2.71E-07	1.59E-07	2.95E-09	2.85E-07
A40	1.6	40	7.66E-08	4.08E-06	3.86E-07	3.96E-07	9.93E-09	8.08E-07
A30	1.6	30	7.94E-08	2.61E-06	2.66E-07	7.57E-07	2.42E-08	1.79E-07
A20	1.6	20	1.96E-08	8.05E-07	4.97E-08	1.27E-07	2.25E-09	7.11E-08
A10	1.6	10	8.80E-11	1.05E-08	3.02E-11	3.68E-10	3.34E-11	9.96E-11

Study on Calculation of Customer Vehicle Fatigue Damage Based on Road Condition Identification and Element Spectrum

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Figures/Tables 23

References 25

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分割路段序号	时间/s	里程/km	平均车速/ （km·h^-1）	IRI/ （m·km^-1）
1	419	1.0	8.6	2.38
2	201	1.0	17.9	1.44
3	92	1.0	39.1	1.8
4	215	1.0	16.9	2.3
5	92	1.0	38.9	1.81
6	167	1.0	21.6	1.25
7	124	1.0	28.9	1.71
8	177	1.0	20.3	2.07
9	179	1.0	20.3	2.25
10	113	1.0	31.7	2.47
11	104	1.0	34.6	1.95
12	147	1.0	24.6	1.65
13	80	1.0	44.8	1.61
14	78	1.0	46.3	2.28
15	73	1.0	49.4	1.82
16	85	1.0	42.1	2.39
17	80	1.0	45.3	1.12
18	68	1.0	52.9	0.72
19	69	1.0	51.8	0.95
20	92	1.0	39.6	2.20
21	69	1.0	51.9	1.14
22	76	1.0	47.2	1.47
23	188	1.0	19.1	2.04
24	120	1.0	30.0	2.04
25	314	1.0	11.5	2.28
26	93	1.0	39.0	1.55
27	83	1.0	43.1	1.92
28	159	1.0	22.7	1.66
29	222	1.0	16.2	2.31
30	343	1.0	10.4	2.77
31	148	1.0	24.5	2.96
32	184	1.0	19.5	3.11
33	84	1.0	42.8	2.90
34	174	1.0	20.8	3.63

区间	B10	B20	B30	B40	B50	B60
状态点数	3	5	1	2	1	0
里程数/km	3	5	1	2	1	0
区间	A10	A20	A30	A40	A50	A60
状态点数	0	7	3	6	6	0
里程数/km	0	7	3	6	6	0

损伤类别	应变测点1	应变测点2	应变测点3	应变测点4	应变测点5	应变测点6
路线探测损伤	3.00E-06	1.06E-04	1.71E-05	1.36E-05	3.03E-07	1.17E-05
路线实际损伤	2.81E-06	9.82E-05	1.44E-05	1.62E-05	3.70E-07	1.22E-05
比值	1.07	1.08	1.19	0.84	0.82	0.96

损伤类别	应变测点1	应变测点2	应变测点3	应变测点4	应变测点5	应变测点6
城市干线探测损伤	1.52E-05	5.56E-04	8.06E-05	7.85E-05	1.98E-06	6.95E-05
城市干线实际损伤	1.70E-05	4.79E-04	7.47E-05	9.02E-05	2.18E-06	7.48E-05
比值	0.89	1.16	1.08	0.87	0.91	0.93

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区间	应变测点1	应变测点2	应变测点3	应变测点4	应变测点5	应变测点6
B60	0	0	0	0	0	0
B50	5.54E-07	1.60E-05	3.92E-06	1.29E-06	2.54E-08	9.55E-07
B40	5.96E-07	2.15E-05	5.73E-06	2.85E-06	5.69E-08	1.91E-06
B30	9.72E-08	3.41E-06	4.29E-07	4.29E-07	9.42E-09	1.87E-07
B20	4.71E-07	1.30E-05	1.72E-06	2.22E-06	3.88E-08	8.90E-07
B10	6.59E-08	3.56E-06	1.97E-07	3.63E-07	7.16E-09	1.68E-07
A50	3.77E-07	1.06E-05	1.63E-06	9.52E-07	1.77E-08	1.71E-06
A40	4.60E-07	2.45E-05	2.32E-06	2.37E-06	5.96E-08	4.85E-06
A30	2.38E-07	7.83E-06	7.99E-07	2.27E-06	7.27E-08	5.38E-07
A20	1.37E-07	5.64E-06	3.48E-07	8.87E-07	1.58E-08	4.98E-07
A10	0	0	0	0	0	0