埋设地下光缆对武都地电影响的分析

ANALYSIS ABOUT THE INFLUENCE OF UNDERGROUND OPTICAL FIBER CABLE ON GROUND RESISTIVITY AT WUDU STATION

着重探讨武都地电台测区埋设地下光缆后北西道地电阻率测值急剧上升的原因.通过实际观测、理论分析和实验,总结出了这种变化的机制,定量地解释了埋设地下光缆对地电观测的影响,从而为以后判断地电测值变化是干扰还是地震异常提供了依据.

The ellipsoidal coordinates and the square root characteristics of the displacement jumps across the crack surface are cleverly used in the hypersingular integral equations for an arbitrary planar crack embedded into the infinite three dimensional homogeneous elastic solid. This gives rise to analytical solutions of the hypersingular integral equations for the elliptical crack subjected to uniform pressures in any direction. Furthermore, with the help of these solutions and K field definitions, exact expressions of mode Ⅰ, mode Ⅱ and mode Ⅲ stress intensity factors near the crack front are obtained. The present results are the same as the other available exact solutions.