加劲环式压力钢管局部稳定性分析的有限柱壳单元法  

Finite cylinder shell element method for analysis of local stability of stiffener penstock

作　　者：马文亮[1] 刘东常[1] 刘琰玲[1] 兰文改[1] 

机构地区：[1]华北水利水电学院土木工程系,河南郑州450008

出　　处：《水利水电科技进展》2005年第2期33-35,共3页Advances in Science and Technology of Water Resources

基　　金：国家自然科学基金资助项目(50079005)

摘　　要：采用半解析有限柱壳单元法,分析了水电站加劲环式压力钢管的局部稳定性问题.在分析过程中考虑了初始缝隙和加劲环的影响,建立了圆柱壳单元的刚度矩阵.计算结果可以较好地与经典的理论解及试验结果相吻合,为加劲环式压力钢管局部稳定性问题分析提供了一种新的可行方法.In the present study, a stiffness matrix of cylinder shell elements was established with the influences of incipient interstices and stiffeners taken into account. The calculated results accord with the classical theoretical and experimental solution, therefore, the method provides a new and feasible way for local stability analysis of stiffener penstocks.

关 键 词：压力钢管 加劲环 局部稳定性 初始缝隙 圆柱壳单元 

分 类 号：TV34[水利工程—水工结构工程]