气囊有限元简化模型的建立及弹簧系数变化规律研究

Study of the Simplified Finite-Element Model and the Law of Spring Coefficient Variation

考虑到气囊模型的特性与弹簧模型的特性相似,利用有限元法把复杂的气囊模型简化为常用的弹簧模型。弹簧系数通过作用力与位移的关系体现,其大小与气囊的内压、相互间接触位置(倾角)及直径有关。探讨了弹簧系数在不同气囊参数下的变化规律,为其在工程保障中的应用打下基础。

Considering that the property of the gasbag model is similar to that of the spring model,the complex gasbag model is simplified to a general spring model in the light of the Finite Element Method.The spring coefficient is embodied through the relation of active force and displacement.Its magnitude relates to the internal pressure,inter-contacting location between each other（obliquity）and the diameter of the gasbags.The law of spring coefficient variation in different parameters of the gasbag is explored,which lays a foundation for the application of gasbags to engineering support.