Abstract

Two analytical models are presented for an airbag installed as an aircraft seat cushion to reduce shock to passengers during an emergency. In the first model, an airbag is modelled as a rigid cylinder, while in the second model, initial deformed shapes and volume changes of an airbag after crash are considered. In numerical simulations, effects of orifice contraction coefficient, exhaust diameter ratio and rupture pressure on the inner pressure of the airbag, and acceleration and displacement of the falling body are clarified for the two models by dropping a falling mass against a pre-inflated test airbag equipped with an exhaust orifice. Furthermore, the numerical results are compared with experimental results.

摘要

提供了两种分析模型，用于安装作为飞机座垫的安全气囊，以在紧急情况下减少对乘客的冲击。在第一个模型中，安全气囊被建模为刚性圆柱体，而在第二个模型中，考虑了碰撞后安全气囊的初始变形形状和体积变化。在数值模拟中，通过在预充气的试验气囊上落下坠落物，阐明了两种模型的孔口收缩系数、排气直径比和破裂压力对气囊内压以及下落体加速度和位移的影响配有排气孔。此外，数值结果与实验结果进行了比较。