基于仿真分析的汽车侧面气囊参数优化设计

Optimization design of side airbag based on side impact simulation

侧面气囊对于提高汽车侧面碰撞中的乘员保护效能有重要作用。采用PAM-CRASH软件建立了包含约束系统模型在内的整车侧面碰撞有限元(FE)模型,并通过仿真计算和试验结果的比较验证了模型的有效性。对某轿车的侧面安全气囊泄气面积、气体质量流量、几何尺寸等参数进行了优化设计。优化设计后该车在"中国新车评价程序"(C-NCAP)侧面碰撞中胸部得分从0分提高到1.8分。

Side airbag plays an important role in improving occupant protection in vehicle side imapct.The whole vehicle finite element（FE） model for side impact was developed with the software of PAM-CRASH by ESI Group.The FE model was validated by comparing the simulation and test results.The optimization method of side airbag parameters was discussed based on simulation.The leakage area,inflator gas flow rate and dimension of side airbag on a passenger car were optimized.Upon the improvement,the C-NCAP（China New Car Assessment Program） rating score of thorax on the car is improved from 0 to 1.8.