接近临界 meaning in English
approach to criticality
Examples
- The major research of this paper is that : 1 , it is analyze the displacement response of the elastic - foundation beam by the static loads and the moving loads , the dynamic response of winkler beam , analyze the influence of the sleeper in the dynamic response of the rail system . and compare the result with the experiment formulation . it is concluded that the continuous model only fit for the lower moving velocity of loads
本文主要进行了以下几方面的研究： 1 、首先对静力荷载作用下弹性地基梁的位移反应、文克尔梁模型的动力响应，及枕木在轨道系统动力响应中的作用进行了分析，并与传统采用的经验公式进行对比，以此分析了连续性模型只适用于荷载移动速度较低的情况下，在速度较高的情况下，特别是接近临界速度时，连续性模型是无效的。 - Before rock failure , it is found that ae distributed densely , and the coming fracture will occur in the density center of high magnitude events , and ae ratio of frequency grows greatly . these precursors can be presented by the change of b value , a t value and the contour of v value . prefab crack systems in the specimen will affect the fractures hi rocks
关于岩石破裂过程中一些物理量的变化，发现在岩石破裂前，主破裂发生的区域先出现大能级声发射的密集分布；在岩石加载的临界状态，大能级的声发射数量大量增加；在接近临界时，大能级声发射事件在失稳前频度突然加快。