火电厂主蒸汽管道的弹性蠕变损伤本构模型研究

The Research Pattern of the Basic Structure on Power Plant Main Steam Pipe in Which A Plastic Creep Damage Occurs

针对火电厂中蒸汽管道与汽包类承压部件用耐热钢,在承受高温高压时发生弹性蠕变损伤问题,给出完整的损伤本构描述,建立起唯象学蠕变损伤理论。在这里主要提出耐热钢的弹性蠕变损伤本构模型,建立起相应的数值变分原理以及有限元离散化形式,从而形成完整的数值变分方法。

In connection with the plastic creep damage issue station main steam pipe and box-that made of heat-resisting high-pressure ,an integrated basic structure for damage is based on it＇ s phenomenon is established. The creep which occurs in the pressed parts power steel when it bears high temperature and described and the creep damage theory damage tattern of heat-resisting steel is given. Digital calculus of variations and separate finite element form is consequentially established. So an integrated digital method of variation came into being.