双层扁平绕带式压力容器的刚塑性动力响应分析

Analysis on the rigid-plastic dynamic response of two-walled pressure vessels with flat-wound steel ribbons

采用刚塑性模型对双层“长”扁平绕带式压力容器受径向矩形脉冲内压作用的动力响应进行了分析,给出了结构在中载和高载作用下的变形模态、极限压力、响应时间和残余位移的表达式。计算结果表明,该种容器的静态极限压力值低于整体式压力容器的相应值;绕带层残余位移远大于其内壳和整体式压力容器的残余位移;当所受高载小于24.5 MPa时比整体式压力容器具有更强的抗冲击能力。

The dynamic response of two-walled ＂long＂ pressure vessels with flat-wound ribbons subjected to an internal pressure with rectangular shape has been analyzed with the rigid-plastic model. The models of plastic deformation are given under middle and high loadings, respectively. The formulas of the limit pressure, response time and residual displacement of the vessels are proposed. Numerical results show that the static limit pressure of the vessel is less than that of monolithic vessel, the residual displacement of the vessel is more than that of the inner shell and monolithic ones, and the shock-resistantance of the vessel is greater than that of monolithic vessel under loading pressure less than 24.5 MPa.