With increase of distance, tensile stress is translated into compressive stress arid tends to zero.
随着远离起始端距离的增加拉应力值逐渐减小转变为压应力，最后趋向零。
When the damped parameter tends to zero, the result in this paper is consistent with the non-damped case.
当阻尼介质参数趋于零时，本文结果与无阻尼解一致。
In the case of fluid load the radial displacement in transient response mode tends to zero, and the porewater pressure varies relatively smoothly.
球壳内作用有流体压力时在瞬时响应模式下位移趋近于零，而孔隙水压力变化相对平缓。
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