【摘要】 在推导环肋圆柱壳屈曲临界载荷的基础上,通过能量与结构刚度之间的关系,分析了肋骨弯曲刚度、扭转刚度和压缩刚度对环肋圆柱壳失稳载荷的影响.分别折减肋骨弯曲刚度和壳板刚度,研究了不同位置的肋骨在环肋圆柱壳总体稳定性中的作用,并将单根肋骨刚度折减系数转换成所有肋骨的平均折减系数;分析了壳板刚度对环肋圆柱壳总体稳定性的影响,给出了肋骨和壳板刚度同时折减时环肋圆柱壳总体稳定性的计算方法.为环肋圆柱壳的设计以及含缺陷圆柱壳承载能力的研究提供了一种理论参考.更多还原

【Abstract】 Through the relationship between energy and structural stiffness,the effects of bending stiffness,torsion stiffness and compression stiffness of ribs on the buckling loads of stiffened cylindrical shells are analyzed based on the critical buckling loads derived in this paper. Then the rib stiffness and shell stiffness are reduced to study the effects of different ribs on general stability of stiffened cylindrical shells and the reduced coefficient of a single rib is transformed to average reduced coefficient of all ribs. The effects of shell stiffness on the general stability of cylindrical shells are analyzed and the calculation method of general stability of cylindrical shells is given with the ribs stiffness and shell stiffness both reduced. This paper can provide a theoretical reference for research of the stability load-carrying capacity of stiffened cylindrical shell with initial imperfection and the design of stiffened cylindrical shells.更多还原