摘要
由于初始缺陷会引起轴压圆柱壳失稳载荷很大程度的折减,本文基于刚度折减方法,推导建立轴压圆柱壳失稳载荷计算公式,分析轴对称缺陷对轴压圆柱壳各部分刚度的影响。结果表明,轴对称初始缺陷对轴压圆柱壳薄膜刚度影响较大,初始缺陷经过了圆柱壳失稳波数的二次方放大。
The initial imperfections can greatly reduce the critical buckling load of the axially compressed thin-walled cylindrical shell.The influence of the initial axisymmetric defects on the stiffness of each part of the compressed cylindrical shell is discussed with stiffness reduction method(RSM).The results show that the initial axisymmetric defects have a great influence on the membrane stiffness of the cylindrical shell,which reduces the stability carrying capacity of the axially compressed cylindrical shell.The initial defect is amplified by the square of the instability wavenumber of the cylindrical shell.
作者
白旭
李金华
BAI Xu;LI Jin-hua(School of Naval Architecture and Ocean Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China;Institute of Marine Instruments and Instruments,Qilu University of Technology(Shandong Academy of Sciences),Qingdao 266061,China)
出处
《舰船科学技术》
北大核心
2020年第7期34-39,共6页
Ship Science and Technology
基金
国家自然科学基金面上项目(51879125)
国家重点研发计划项目(2016YFC0300600)
江苏省高校自然科学重大研究项目(18KJA580003)
江苏省“六大人才高峰”高层次人才资助项目(2018-KTHY-033)。
关键词
圆柱壳
轴压
轴对称缺陷
失稳载荷
刚度折减
cylindrical shell
axial compression
axially symmetric defect
stability carrying capacity
stiffness reduction method
