本文提出并证明了在各向同性强化条件下的安定定理，即在循环载荷作用下，各向同性强化材料的结构，其安定状态总是可以实现的。
Shakedown theorem under isotropic hardening is presented and proved in this paper. Namely, shakedown state is always achievable for structure of isotropic hardening materials under cycling loads.
文末对结构整体的载荷-位移行为的分析，揭示了周期载荷作用下的两种结构响应模式：1接触塑性安定；2增量破坏。
Analysis of synthesis of response presented at the end of the paper reveal two modes of structural responses: 1 contact plastic shakedown and 2 progressive failure.
本文提出了一般强化材料结构的动态安定性定理及周期外载荷作用下的一种动态安定分析方法。
Based on the unified hardening model, a dynamic shakedown analysis for structures under cycling loads are presented.
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