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为了给空降车及其气囊的优化设计提供技术支持,采用有限元方法对空降车气囊缓冲过程进行仿真分析。计算了正常着地工况下的气囊缓冲过程,得到速度、加速度以及气囊内压等时间特性曲线。结果表明:空降车在该工况下着地速度小于3m/s,该气囊符合空降车着地的缓冲性能要求。车体加速度和冲击应力在误差许可范围内,验证了采用此种方法进行空降车气囊缓冲过程的虚拟测试是可行的。
In order to provide technical support for the optimization design of the airborne vehicle and its airbag, the airbag cushioning process of the airborne vehicle is simulated by finite element method. The airbag cushioning process under normal ground conditions was calculated, and the time characteristic curve of speed, acceleration and airbag internal pressure were obtained. The results show that the landing speed of airborne vehicles under this working condition is less than 3m / s, which meets the requirements of cushioning performance of airborne vehicles. The body acceleration and impact stress are within the allowable error range, and it is verified that the virtual test of airbag cushioning by this method is feasible.