考虑材料强化的结构安定性分析方法

The Structure Shakedown Analysis Mcthod Considering Material Hardening

应用统一强化模型和塑性应变模态的概念，建立了考虑材料强化时求解安定极限载荷下限的线性规划数值逼近法。另外，基于安定分析的机动学原理，建立了一种估计安定极限载荷上限的方法，可以和求解下限过程结合起来，从而估计误差的范围。最后给出了数值算例，证明了本文所提供方法的可靠性和适用性．

By using the unified hardcning model and the concept of plastic strain mode,this paper obtains a method to find the lower bound of shakedown limit ofhardening material strticture,On the other hand,based on the second shakedown theory,this paper intro- duces a method for estimating the upper bound of shakcdawn iimit which can be com-bined with the procedure of finding the lower bound in lhe program,so as to predicate the error range from the both boundS.Finally,some numerical examples prescnted in this pa-per show that this method is both accuratc and adaptable.