摘要
工程结构屈曲的有限元分析方法通常包括特征值分析、几何非线性分析和几何/材料双非线性分析三种方法。本文通过算例分析和对比,认为双非线性分析法可得出更合理的结果。系列计算表明,外压圆筒体屈曲临界压力值会随筒体椭圆度的增加而明显降低。
Three finite element analysis methods are normally employed in the buckling analysis of engineering structures, which are eigenvalue method, geometry nonlinear method and geometry - material nonlinear method respectively. Based on example analysis and results comparison, the geometry - material nonlinear method is considered as the most reasonable one. Series analysis showed that the critical buckling pressure of cylinder under external pressure could be obviously decreased with the increase of eUipticity of cylinders.
出处
《压力容器》
北大核心
2006年第6期27-29,51,共4页
Pressure Vessel Technology
关键词
有限元
屈曲
分析方法
椭圆度
finite element
buckling
analysis method
ellipticity
