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当前位置: 首页 > 文章 > 球冠状凹陷对圆柱壳轴向临界载荷的影响 长江大学学报(自科版)农学卷 2018 (21) 26-30+5
Position: Home > Articles > The Effect of Spherical Cap Depression on Axial Critical Load of Cylindrical Shells Journal of Yangtze University(Natural Science Edition)Agricultural Science Volumn 2018 (21) 26-30+5

球冠状凹陷对圆柱壳轴向临界载荷的影响

关键词：
凹陷;圆柱壳;临界载荷;屈曲
摘  要：
针对导管架受撞击后结构轴向临界载荷发生变化的问题,采用线性屈曲分析模块,模拟分析了凹陷位置、凹陷半径及深度对圆柱壳轴向临界载荷的影响,得出了球冠状凹陷对圆柱壳轴向临界载荷的影响规律。结果表明,承受轴向载荷圆柱壳对缺陷的敏感程度与凹陷位置、半径及深度有关;凹陷位置变化使得轴向临界载荷近似呈现正弦规律,凹陷半径增加使得轴向临界载荷减小,且临界载荷变化率逐渐降低;凹陷深度增加使得轴向临界载荷减小,且临界载荷变化率逐渐增加;圆柱壳对凹陷存在2个最敏感区和2个最不敏感区,这些区域不随凹陷位置、凹陷半径及深度的变化而变化;用Fourier级数拟合凹陷圆柱壳轴向临界载荷计算公式,计算值与仿真结果平均绝对误差是1.5%,满足工程分析的需要。
译  名：
The Effect of Spherical Cap Depression on Axial Critical Load of Cylindrical Shells
作  者：
Pan Li;Li Meiqiu;Chi Dao;Yangtze University;
关键词：
dent;;cylindrical shell;;critical load;;buckling
摘  要：
In view of the problem that the axial critical load of the structure changes after the jacket is impacted,the linear buckling analysis module is used to simulate and analyze the influence of the position,the radius and the depth of the depression on the axial ultimate load of the cylindrical shell.The influential law of spherical crown depression on the axial critical load of cylindrical shell is obtained.The analysis results indicate that sensitivity of cylindrical shells subjected to axial loads to the defects is related to the location,radius and depth of the dent.The variation of the dent position induces the approximate sinusoidal to the axial critical load,and the increasing of the dent radius induces the axial critical load decrease,and the critical load change rate decreases gradually.When the depth of depression increases,the axial critical load decreases and the rate of variation of critical load increases gradually.The cylindrical shell has two most sensitive regions and two most insensitive regions to the dent.These areas do not vary with the location,the radius and depth of the dent.The formula for calculating the axial critical load of depressed cylindrical shells was fitted by Fourier series.The average error between the calculated value and the simulation result is 1.5%,and it basically meets the needs of engineering analysis.

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