摘要
本文提出一个合理的塑性流动位移场,应用能量法研究了静水外压作用下环肋锥锥结合壳转折区壳板的塑性极限承载能力,利用梯度法求解相应的非线性方程组。当退化到环肋锥柱结合壳时,本文结果优于文献[3]。文中给出了凸式结合壳转折区发生外凸塑性流动位移场的充分条件。编写了计算机程序并进行了数值计算。
A kind of good plastic flow displacement field is presented and the plastic limit analysis approach for near intersection region of ring-stiffened conical-conical jointed shells under external hydrostatic pressure using the energy method is formulated in this paper. The nonlinear problem with the lengths of plastic flow region is solved by means of gradient method. The sufficient condition about forming the convex plastic flow displacement field of convex conical-conical jointed shells is demostrated. Numerical results are given using the computer program developed. The procedure presented is also used to the plastic limit analysis for near intersection region of ring-stiffened conical-cylindrical jointed shells under external hydrostatic pressure and better results are obtained than before.
出处
《中国造船》
EI
CSCD
北大核心
1992年第2期87-96,共10页
Shipbuilding of China
