Research on the Optimization of Thorax-head Airbag for Vehicle Side Impact

To minimize thorax-abdomen injuries in side impact and to make sure that HIC meet C-NCAP requirements,an optimization design of head-thorax airbag was conducted by using the validated FE models,the stepwise regression surrogate model and successive optimization method.An L-shape head-thorax airbag model was established and installed on a validated vehicle FE model.The response process of the airbag in side impact was simulated in combination with driver model.The airbag design parameters were analyzed and optimized.So the integrated safety property of this car was improved,and the reliability of optimizing results was also evaluated.The results from this study have shown that the materials permeability parameters is 0.040 8,the airbags for the initial volume is 120 percent,the switch time is 10ms,so that the comprehensive assessment value of side impact declines by 16 percent,thus ensuring the injury value HIC to meet the requirements.