作　　者： ; ; ;

机构地区： 湖南工业大学包装与材料工程学院包装新材料与技术重点实验室

出　　处： 《包装工程》 2010年第7期15-18,共4页

摘　　要： 建立并离散生成了液化气钢瓶的有限元模型，模拟分析了其在定载下的静态力学性能、振动模态以及疲劳性能。结果表明：液化气钢瓶的失效部位主要在瓶身及接管与封头的连接处，且这些位置的剪切作用非常大；在自由振动条件下，液化气钢瓶奇数阶振型与相应偶数阶振型一致，其振动频率之差小于0.5 Hz；第1和2阶振型表现为液化气钢瓶绕底座支撑偏离轴心的摇摆振动，以后各阶振型均表现为瓶身的径向收缩振动；当液化气钢瓶所受载荷低于当前载荷（1.7 MPa）的70%时，疲劳结果不会发生显著变化，位于70%～100%之间时所受载荷大小对疲劳结果的影响非常大。 The finite element model of liquefied gas cylinder was established by using the CAD software Pro/E and CAE software WORKBENCH 10.0, and the simulation of static mechanical performance, vibration modes and fatigue properties were carried out. The results proved： Failure of liquefied gas cylinder occurred at the central body and the joint of the tube and top cover, where shearing effect was significant; under free vibration condition, vibration modes of odd order were consistent with those of corresponding even order with a frequency error range of 0.5 Hz; the first two order vibration modes acted as swinging vibration around the support of cylinder, while the others exhibited radial expansion. The fatigue results changed little with load lower than 70% and varied greatly with that between 70%～100% or more.

关 键 词： 液化气钢瓶 模态分析 疲劳分析 安全系数

领　　域： [一般工业技术] [一般工业技术]