偏心受压圆柱形气囊结构静态力学特性研究

Study on Static Mechanical Characteristics of Eccentric Compression Cylindrical Capsule Structure

板囊组合结构是工程中气囊承载结构的一种典型结构形式,该结构中气囊承载能力与囊体结构尺寸、初始内压等因素呈复杂的非线性关系。针对不同载荷条件作用下气囊出现的各变形情况,通过对囊体受力变形过程分析简化与几何变形描述,建立了适用于均匀下压变形和横向倾斜下压变形情况下囊体变形、内压及刚性面板承载力关系的数学模型。通过均匀下压变形试验实测数据,分析验证了该模型计算结果的合理性;并进一步运用该数学模型,通过分析均匀下压变形和横向倾斜下压变形情况下气囊内压与承载力变化规律得出了相关结论,可为气囊承载结构的气囊充气选型、工况预测等工作提供理论指导与参考。

The plate capsule composite structure is a typical structural form of the airbag bearing structure in engineering.The airbag bearing capacity of this structure has a complex nonlinear relationship with the structural size of the capsule and the initial internal pressure.Aiming at the deformation of the capsule under the different load conditions,the stress deformation analysis process of the capsule is simplified and the geometric deformation is described.A mathematical model for the relationship between capsule deformation,internal pressure and bearing capacity of rigid panel is established,which is suitable for analyzing the simplified uniform compression deformation and transverse inclined compression deformation.Through the measured data of uniform compression deformation experiment,the rationality of the calculation results of the model is analyzed and verified.Further using the mathematical model,by analyzing the variation law of airbag internal pressure and bearing capacity under the conditions of uniform compression deformation and transverse inclined compression deformation,relevant conclusions are obtained,which can provide theoretical guidance and reference for airbag inflation selection and working condition prediction in airbag bearing structure.