纤维缠绕气瓶设计分析

Design analysis on the filament-wound gas cylinder

讨论了具有金属内衬的纤维缠绕气瓶在加压和卸压过程中的变形特性。依据网格理论,给出了纤维缠绕壳体的设计方法。对塑性性能良好的金属材料内衬,可用强度理论中的最大正应变准则进行强度设计。推导出气瓶卸压时内衬不失稳所应满足的条件。为使卸压时内衬不失稳,内衬与纤维缠绕壳体之间应有足够的粘接强度,而且内衬的壁厚应越薄越好。对壁厚较薄的内衬,给出了气瓶卸压时内衬不失稳的最小粘接强度的确定方法。算例表明,文中给出的设计分析方法,可用于具有金属内衬纤维缠绕气瓶的初步设计。

The deformation characteristics of the filamemt-wound gas cylinder with a metal internal liner during pressurization and pressure relief processes were discussed. Based on netting theory, design method for the filamemt-wound case was presented. For the metal internal liner with excellent plastic property, the maximum normal strain criterion in strength theory can be used for strength design. The unbuckling conditions for internal liner during pressure relief process were derived. In order to make internal liner unbuckling, there should exist enough bonding strength between internal liner and the filamemt-wound case. Moreover internal liner should be as thin as possible. For the thiner internal liner, determination method of the minimum bonding strength to ensure internal liner unbuckling was given. The calculation examples show that the above method can be used for the preliminary design of the filament-wound gas cylinder with a metal internal liner.