摘要
采用有限元软件ANSYS对柱壳使用8种不同结构加强圈时的稳定性进行了线性特征值屈曲分析和非线性屈曲分析,给出了带加强圈外压柱壳的失稳模态和载荷位移曲线。结果表明,两种分析方法虽存在一定误差,但其分析结果有相同的变化趋势,设计时可先利用线性特征值法优选加强圈,然后采用非线性方法对柱壳进行详细的稳定性分析。在角钢、T型钢、扁钢、半圆环壳和Ⅱ型钢等8种加强圈中,T型加强圈对柱壳的加强效果最好。安装加强圈时,应尽量使加强圈的形心轴远离容器器壁。
The linear eigenvalue buckling analysis and nonlinear buckling analysis using finite el- ement software ANSYS has been carried out on the stability of cylindrical shells with 8 kinds of stiffening rings, the instability mode and load-displacement curve of ring-stiffened cylindrical shells subjected to external pressure are given. non-linear buckling analysis shows similar trend, be carried out, after linear eigenvalue method is The results showed that, linear eigenvalue and though with error. The stability analysis should employed to the stiffening ring optimizing in thedesign of cylindrical shell. Among angle steel, T profile steel, flat steel, half-tube and Ⅱ profile steel eight kinds of stiffening rings, T profile steel has the most best strengthen effect to cylindri- cal shells, and try best to keep the centroidal axis of stiffening ring away from the vessel wall when fixing the stiffening ring.
出处
《石油化工设备》
CAS
2012年第5期28-32,共5页
Petro-Chemical Equipment
关键词
柱壳
加强圈
屈曲
有限元分析
cylindrical shells
stiffening ring
buckling
finite element analysis
