前屈曲应力状态对组合加肋旋转壳失稳临界压力影响的探讨  

DISCUSSION ON THE INFLUENCE OF PREBUCKLING STRESS SYSTEM ON THE CRITICAL BUCKLING PRESSURE OF RING-STIFFENED COMBINED SHELL OF REVOLUTION

作　　者：白雪飞[1] 任文敏[2] 郭日修[1] 

机构地区：[1]海军工程大学船舶与海洋工程系,武汉430033 [2]清华大学航天航空学院工程力学系,北京100084

出　　处：《固体力学学报》2007年第2期195-199,共5页Chinese Journal of Solid Mechanics

摘　　要：推导了包含前屈曲弯矩和横剪力的旋转壳弹性稳定性基本方程.运用Riccati传递矩阵法对组合加肋旋转壳算例进行了稳定性分析,并与假设前屈曲状态为薄膜应力状态计算出的失稳临界压力进行了比较.结果表明,前屈曲弯矩和横剪力对组合加肋旋转壳失稳临界压力的影响较小,随着壳板厚度和肋骨尺寸的增大及肋骨间距的缩短,影响略有增大.因而,分析组合加肋旋转壳弹性稳定性时,前屈曲状态采用薄膜应力状态的假设是合理的.Basic elastic stability equations of the shell of revolution are deduced and the moments and transverse shear forces in the prebuckling basic stress system are considered in the equations. By using Riccati transfer matrix method, the stability of some examples of ring-stiffened combined shell of revolution is analyzed. The calculated results of the critical buckling pressure are compared with the results of the examples, of which the prebuckling stress are assumed to be membrane. The comparison shows that the influence of the moments and transverse shear forces on the critical buckling pressure is small and it increase tween stabi buck s slightly along with the decrease of the length of combined shell of revolution or the distance beribs and the increase of the shell thickness or the dimension of ribs. So, when analyzing the elastic ty of ring-stiffened combined shell of revolution, the assumption of membrane stress system before ng is reasonable.

关 键 词：组合加肋旋转壳 稳定性 前屈曲应力状态 Riccati传递矩阵法 

分 类 号：O344[理学—固体力学]