内肋骨长舱段塑性总体稳定性计算方法研究  

Theoretical research on calculation methods for plastic general buckling stability of long cylindrical pressure hull with internal ribs

作　　者：邱昌贤[1] 黄进浩[1] 秦天[1] 王琨 QIU Chang-xian;HUANG Jin-hao;QIN Tian;WANG Kun(China Ship Scientific Research Center,Wuxi 214082,China)

机构地区：[1]中国船舶科学研究中心,江苏无锡214082

出　　处：《船舶力学》2021年第9期1232-1238,共7页Journal of Ship Mechanics

摘　　要：同时考虑肋骨偏心影响及高强度钢的弹塑性本构关系,利用Ritz法对内置环肋加强且含舯部特大肋骨的圆柱壳长舱段结构在静水外压下的塑性稳定性计算方法进行研究,分别基于J2流动理论和形变理论建立了结构小挠度塑性失稳临界压力的迭代计算方法,并在编程中优化了算法,针对长径比为3.1的高强度钢长舱段结构模型进行了有限元对比计算。结果表明,本文方法给出的长舱段结构塑性总体失稳临界压力与数值计算结果符合较好,可为舱段塑性总体稳定性设计计算提供一种新方法。The plastic general stability of a single-hulled submarine’s long pressure cabin with internal ribs and heavy frames under external hydrostatic pressure was investigated based on Ritz principle,considering the ribs’eccentricity and elastic-plastic constitutive relationship of high strength steel.An iterative method was built on the theoretical foundation of the material’s deformation and flow model to calculate the critical buckling pressure of the structure with small deflection.Compared with the results of the current criterion,the calculated results for general stability with the method in this paper obtained from a high strength steel cylindrical shell model with a length-diameter ratio of 3.1,present a better agreement with the finite element results,offering a new design tool for plastic general buckling stability of pressure hull.

关 键 词：总体稳定性 长舱段 大肋骨 弹塑性 里茨法 

分 类 号：U674.76[交通运输工程—船舶及航道工程]