均布外压作用下蛋形仿生封头屈曲特性  

Buckling of egg-shaped bionic domes under uniform external pressure

作　　者：张建[1,2] 朱本义[1] 黄晨 王纬波[2] 唐文献[1] 吴文伟[2] ZHANG Jian;ZHU Ben-yi;HUANG Chen;WANG Wei-bo;TANG Wen-xian;WU Wen-wei(Jiangsu University of Science and Technology,Zhenjiang 212003,China;China Ship Scientific Research Center,Wuxi 214082,China)

机构地区：[1]江苏科技大学,江苏镇江212003 [2]中国船舶科学研究中心,江苏无锡214082

出　　处：《船舶力学》2020年第8期1047-1054,共8页Journal of Ship Mechanics

基　　金：江苏省自然科学基金项目(BK20190103);国家自然科学基金项目(51709132);江苏省六大人才高峰项目(KTHY-068)。

摘　　要：本文深入研究了304不锈钢制蛋形封头在均布外压作用下的屈曲特性。设计了一种蛋形仿生封头,采用冲压成型技术,制作了5个底部直径160 mm、高121 mm的试验模型;在此基础上,对各模型进行轮廓扫描、超声测厚以及静水压力测试,研究其屈曲载荷和失稳模式;根据扫描和测厚结果,对试验封头进行非线性屈曲数值分析,与试验结果吻合良好。此外,对比分析了蛋形封头和球形封头屈曲特性,表明蛋形封头具有良好的抗压能力,对材料塑性和形状缺陷的敏感性低。The buckling of 304 stainless steel egg-shaped domes is examined under uniform external pressure. An egg-shaped bionic dome was proposed with a base diameter of 160 mm and a height of 121 mm.Five laboratory models were fabricated using the stamping technique. To study the buckling loads and collapse modes of these domes, they were scanned for geometrical shape, measured for wall thickness, and tested to destruction. Nonlinear buckling numerical analysis was carried out for all tested domes according to the scanning and measuring results, which agreed well with the testing results. Also, a comparison of buckling performances between egg-shaped and hemispherical domes was performed. It was suggested that the eggshaped dome shows a good load-bearing capacity, which is less sensitive to the material plasticity and geometric imperfections.

关 键 词：耐压壳 封头 蛋壳 仿生 屈曲 试验 

分 类 号：TE58[石油与天然气工程—油气田开发工程] U661.4[交通运输工程—船舶及航道工程]