Effect of increasing age on injury risk in elderly male occupant

doi:10.3969/j.issn.1674-8484.2023.04.002

Abstract

Abstract:

To investigate the effect of increasing age on the injury risk of male elderly occupants, MADYMO software was used to establish multi-body dummy models combined with the human body size of Chinese 60-79 years old male elderly, based on the Hybrid Ⅲ 50-percentile male dummy. By coupling the model of occupant seat restraint system, the influence relationship between head, chest, thigh and weighted injury criteria (WIC) and age factors of male elderly occupants in 4 age groups (60-64, 65-69, 70-74 and 75-79 years old) was compared and analyzed, and a probability model of injury risk for elderly occupants with increasing age was proposed. The results showed that the HIC value of head, the integrate acceleration value, chest acceleration value and compression value, and the WIC value of comprehensive damage increase linearly with the increasing of the age of elderly occupants; When the age is over 74 years old, the chest 3 ms acceleration shows a steep index upward trend; With the increasing of age, the injury risk of male elderly occupants is significantly positively correlated with age (r > 0.97, p < 0.05).

Key words: automotive passive safety, increasing age, elderly occupant, probability model of injury risk, restraint system, model scaler

CLC Number:

U461.91

TANG Youming, XIE Xiangjian, SUN Guibin, WANG Ping, ZHANG Yi, SUN Guanyu. Effect of increasing age on injury risk in elderly male occupant[J]. Journal of Automotive Safety and Energy, 2023, 14(4): 413-420.

Figures/Tables 16

References 16

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年龄组	60-64岁	65-69岁	70-74岁	75-79岁
体质量/ kg	69.0	68.1	66.7	65.6
站立身高/ cm	165.9	165.4	164.6	164.2
座姿高度/ cm	121.7	120.5	119.3	118.0
头部长度/ cm	20.5	20.5	20.4	20.4
肩部到肘部长度/ cm	28.6	27.9	27.5	27.2
前臂到手长/ cm	41.7	41.4	41.0	40.9
脚长/ cm	23.2	23.1	22.9	22.7
手长/ cm	17.3	17.2	17.1	17.1

年龄组	60-64岁	65-69岁	70-74岁	75-79岁
体质量/ kg	69.0	68.1	66.7	65.6
站立身高/ cm	165.9	165.4	164.6	164.2
座姿高度/ cm	121.7	120.5	119.3	118.0
头部长度/ cm	20.5	20.5	20.4	20.4
肩部到肘部长度/ cm	28.6	27.9	27.5	27.2
前臂到手长/ cm	41.7	41.4	41.0	40.9
脚长/ cm	23.2	23.1	22.9	22.7
手长/ cm	17.3	17.2	17.1	17.1

损伤指标	实验值	仿真值	误差/ %
HIC₁₅	247.87	234.98	5.20
a_h-peak / g	52.76	48.85	7.41
a_c-peak/ g	51.50	53.15	3.20
D / mm	32.10	34.89	8.70
F_L-peak / kN	1.930	1.832	5.10
F_R-peak / kN	1.485	1.558	4.91
WIC	0.602	0.570	5.32

损伤指标	实验值	仿真值	误差/ %
HIC₁₅	247.87	234.98	5.20
a_h-peak / g	52.76	48.85	7.41
a_c-peak/ g	51.50	53.15	3.20
D / mm	32.10	34.89	8.70
F_L-peak / kN	1.930	1.832	5.10
F_R-peak / kN	1.485	1.558	4.91
WIC	0.602	0.570	5.32

假人模型	HIC₁₅	相对变化率 %	合成加速度 g	相对变化率 %
60~64岁	150.2	—	40.6	—
65~69岁	187.1	24.57	44.2	8.87
70~74岁	227.4	21.54	48.1	8.82
75~79岁	253.6	11.52	50.6	5.20