摘要
研究了环肋的剪切效应对环肋圆柱壳总体稳定性的影响。引入描述环肋变形的四个广义位移及其对应的壳体变形的四个广义位移,采用Timoshenko环梁理论来分析环肋变形,应用Ritz法对环肋圆柱壳的总体稳定性进行了研究。给出的临界载荷数值结果与文献的实验值吻合较好。计算结果还表明对于外部均匀承压的环肋圆柱壳,环肋的面内剪切变形对较低环向屈曲波数下的总体失稳临界载荷影响是微小的,但对较高环向屈曲波数下失稳载荷的影响是明显的。
The effect of shear deformation on the overall stability of ring-stiffed cylindrical shell is considered. Four generalized displacements for the ring corresponding to that for the shell are introduced, and Timoshenko beam theory is used to analyze deformation of the ring. The overall stability of ring-stiffed circular shell is investigated by using Ritz method. The present numeric results of critical loads are well close to that of experiments in reference. For ring-stiffed shell subjected to uniform external pressure, the numeric results also show that the effect of shear of ring on the overall critical loads in the lower wave numbers of loop buckling is tiny, however the effect is obvious in the higher that.
出处
《辽宁工程技术大学学报（自然科学版）》
EI
CAS
北大核心
2007年第5期694-696,共3页
Journal of Liaoning Technical University (Natural Science)
基金
国家自然科学基金资助项目(50632010)
作者简介
李国栋（1972-），男，甘肃兰州人，博士研究生，主要从事板壳结构的理论及工程应用研究.
