车辆乘员主动脉钝性损伤仿真分析

doi:10.19562/j.chinasae.qcgc.2022.06.009

Abstract

Abstract:

The refined heart aorta model established earlier are filled with blood based on the fluid-cavity function of software Abaqus， a blood-heart aorta liquid-solid coupling model is constructed， and the fluid exchange with different flow rates are set on aortic valve according to the pressure difference between left ventricle and aorta. Simulations on the frontal crash of driver against steering wheel are carried out under different working conditions to analyze the effects of the cardiac blood output and the inclined angle of steering wheel on the blunt aortic injuries of driver. The results show that ：（1） The blood flow from left ventricle to aorta reduces the peak blood pressure of left ventricle and alleviated the blood pressure fluctuations in the aorta， but the effect on the maximum stress of aorta is not significant；（2） When the tilted angle of steering wheel is 30°， the maximum stress in the aorta reaches 2417 kPa， which is caused by the pressing of anterior chest wall on ascending aorta；（3） When the tilted angle of steering wheel is 60°， the maximum stress in the aorta lowers to 1375 kPa， which is caused by the relative tensile displacement between aortic root and descending aorta.

Key words: collision, driver, blunt aortic injury, steering wheel, fluid-solid coupling

Fang Tong,Xiong Li,Fengchong Lan,Jiqing Chen. Simulation Analysis on Blunt Aortic Injury of Vehicle Occupants[J].Automotive Engineering, 2022, 44(6): 878-885.

Figures/Tables 18

References 27

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编号	转向柱倾角/ （°）	心脏血输出量	冲击速度/ （m·s^-1）	初始血压/ mmHg
A	30	不考虑	6.8	80
B	30	考虑	6.8	80
C	45	考虑	6.8	80
D	60	考虑	6.8	80

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Simulation Analysis on Blunt Aortic Injury of Vehicle Occupants

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