local instability meaning in English

局部不稳定
局部失稳

The results show that the stress rate criterion applies for the judgment of the truss structural instability , and the criterion is more effective and definite in the local instability
结果表明，应力变化率准则可以有效判定杆系结构的动力失稳，并且在判定结构的局部失稳方面非常有效和明确。
In accordance with the occurrences of weak interlayers , cracks and deep cracks with collapses in the body of the dam for heisonglin reservoir and the further developing tendencies of them , the technique of the fracture grouting is applied , and then the problem of the local instabilities in the dam is solved
摘要针对黑松林水库坝体存在软弱夹层及裂缝和深层隐蔽裂缝、塌坑及其有进一步扩大的趋势，运用劈裂灌浆技术，解决了该坝体局部存在不稳定的问题。