无限饱水弹性空间中由瞬态力偶源所产生的位移场

THE DISPLACEMENT FIELDS CAUSED BY A TRANSIENT COUPLE SOURCE IN AN INFINITE POROUS ELASTIC SATURATED SPACE

本文利用Laplace、Feurier变换力法及Cagniard技术,导出在瞬态源为δ函数形式和Heaviside函数形式的力偶源作用下,饱水孔隙弹性空间中所产生的位移场的理论计算公式。举例计算结果表明,饱水孔隙弹性介质与完全弹性介质在相同力偶源作用下,在第二纵波来到之前产生的位移场不尽相同;在第二纵波来到之后位移场近于一致。

In this paper, by using the Laplace, Fourieor Transform and the Cagniarl methods, the solutions of displacement fields under the action of transient couple source in an infinite porous elastic saturaed space are analytically obtained. Two forms of transient sources are considered: a) δ-pulse source, b) Heaviside step function form of source.