轴压复合材料蛋形壳屈曲特性  

Buckling of axially compressed composite egg-shaped shells

作　　者：周通[1,2] 唐文献 王纬波[3] 张建[1,3] 

机构地区：[1]江苏科技大学机械工程学院,江苏镇江212003 [2]南京航空航天大学机电学院,南京210016 [3]中国船舶科学研究中心船舶振动噪声国家重点实验室,江苏无锡214082

出　　处：《船舶力学》2018年第2期174-188,共15页Journal of Ship Mechanics

基　　金：国家自然科学基金项目(51205173);江苏省基础研究计划(自然科学基金)-青年基金项目(BK20150469)

摘　　要：在对模态缺陷条件下轴压复合材料柱形壳进行屈曲分析的基础上,结合仿生学原理对柱形壳进行形状优化,运用等质量、等容积两种方法,设计与柱形壳开口直径相同的蛋形壳,研究其多模态屈曲特性。结果表明:相对复合材料柱形壳,蛋形壳具有更好的轴向承载能力与更低的缺陷敏感度。从工程实例出发,以单立柱固定式海洋平台的柱形壳桩腿为背景,采用分段式模块化设计的方法,在5%多模态缺陷条件下,研究一般钢结构柱形壳桩腿、碳纤维复合材料柱形壳桩腿、碳纤维复合材料多蛋交接形桩腿的轴压屈曲特性。结果表明:在相同的承载能力下,复合材料多蛋交接形桩腿具有更小的质量、更低的缺陷敏感度与更好的稳定性。Based on buckling analysis of axially compressed cylindrical shells considering mode imperfec-tions, bionics principle is used to conduct shape optimization on cylindrical shells. Two methods of equal mass and equal volume are used to design egg-shaped shells which have the same aperture diameter with cylindrical shells. Buckling characteristics considering multi-modes imperfections of them are investigated. Results show that composite egg-shaped shells have higher axial load capacity and lower imperfection sen-sitivity than cylindrical shells. According to actual engineering projects, spud legs of single column fixed o-cean platforms are set as background and sectional modularized design method is adopted. Axial buckling characteristics of normal steel cylindrical spud legs, CFRP cylindrical spud legs and CFRP multiple inter-secting egg-shaped spud legs are investigated under five percent multi-modes imperfections. Results show that CFRP multiple intersecting egg-shaped spud legs have lighter mass, lower imperfection sensitivity and better stability with the same load capacity.

关 键 词：复合材料蛋形壳 轴向压缩 屈曲 模态缺陷 桩腿 

分 类 号：TB330.1[一般工业技术—材料科学与工程]