摘要
由多个三角形或梯形平面在空间上以平面与平面间周期性按一定夹角连接所构成的似圆柱壳结构是一种新的结构形式,简称为多平面柱壳。论文将该新型结构用于水下耐压结构,定义了其基本几何参数,并推导了重量、体积和惯性矩等常用特征表达的计算公式;比较了多平面柱壳、环肋圆柱壳以及一般圆柱壳这三种柱壳结构受均布水压时的稳定性,并着重讨论这几种柱壳结构对几何初始缺陷的屈曲敏感性。计算结果表明,在一定重量/浮力比条件下,多平面柱壳的临界失稳压力优于圆柱壳,而与环肋圆柱壳的相当;并且多平面柱壳对于几何初始缺陷的屈曲敏感性小于环肋圆柱壳和一般圆柱壳等常用结构。
Polyhedrally-stiffened cylindrical（PC） shell is a new kind of structure where pieces of flat triangular or trapezoidal surfaces are folded regularly and results in cylindrical-resemble form. Geometry characteristics like inertial moment volume and mass of PC shell are analyzed; stability of PC shell at external pressure is compared with conventional cylindrical（CC） shell and ring-stiffened cylindrical（RC） shell respectively. Inertial moment analysis indicates that PC shell is an intrinsically stiffened structure form. It is thought that PC shell has better ability in resist buckling and less sensitive to fabrication defect than CC shell and RC shell under certain gravity buoyancy ratio.
出处
《中国造船》
EI
CSCD
北大核心
2014年第3期64-73,共10页
Shipbuilding of China
基金
国家自然科学基金资助项目(51079060)
关键词
多平面柱壳
几何特征
结构稳定性
屈曲深度
缺陷
polyhedrally-stiffened cylindrical shell
geometrical characteristics
structural stability
buckling depth
defect
