中文摘要：

基于变形加固理论关于结构失稳的严格定义及其集合逻辑表述,提出了基于不平衡力和最小塑性余能原理的地下储库群稳定性判别方法。在非平衡态弹塑性力学框架下,将经典有限元拓展到结构失稳后的分析,塑性余能范数即可作为库群失稳判据,而不平衡力及其发展则表征了库群失稳破坏的形态和演化路径。研究了单储库的稳定性、双储库结构在不同储库间距条件下的整体稳定性及连锁破坏规律,并应用于金坛盐矿油气储库群的稳定性分析和连锁破坏模拟计算分析。研究表明,不平衡力和塑性余能范数用来定量评价地下储库的稳定性是合适的。变形加固理论为评价库群整体稳定性、研究储库间相互作用以及破坏的时空演化提供了定量实用的分析方法,为地下储库群的灾变机制与防护研究打下基础。

英文摘要：

The stability analysis method of underground energy storage cluster is developed using the principle of minimum plastic complementary energy and unbalanced force, based on the strict definition of structure failure and its logical description with set concept presented in deformation reinforcement theory. In the framework of non-equilibrium elastoplastic mechanics, the classic finite element method is extended to the analysis for post-failure state of structure, where the plastic complementary energy norm serves as the criterion of global stability while the unbalanced force and its development indicates the pattern and path of destruction. The cluster stability and chain destruction of double-cavern cluster under different distances are emphatically studied. Results of stability analysis and chain destruction simulation for Jintan oil and gas storage cluster in rock salt deposit is presented. The result shows that the unbalanced force and plastic complementary energy are suitable for quantitatively evaluating the stability of underground storage cluster. Deformation reinforcement theory provides quantitative and practical analysis method for the study of global stability, cavern interaction and space-time evolution of destruction of underground energy storage cluster; and it which can be used for the research of disaster mechanism and protection measures.