＜正＞ Through lots of numerical simulations with FLAC3D, dynamic responses ofslopes are comprehensively studied in this paper and the general regularities of theisoline of the coefficient of the displacement, velocity and acceleration of the slope sectionare reached. Given a certain material slope, if the height of the slope is less than a certain value, the displacement, velocity and acceleration linearly enlarge with elevation in thevertical direction; if the height of the slope surpasses the certain value, the displacement, velocity and acceleration do not linearly enlarge with elevation any more, on the otherhand, they fluctuate with a certain rhythm. At the same time, the rhythm appears in thehorizontal direction, and the displacement, velocity and acceleration of the slope surfaceenlarge near the slope surface. The distribution form of the isoline of the coefficient of displacement, velocity and acceleration in the section of the slope is remarkably affectedby the slope angle. In the certain area near the slope surface, the isoline of displacement, velocity and acceleration is parallel to the surface of the slope; in the mean time the strike direction of the extremum area is parallel to the surface of the slope, too. The charts of the slope dynamic responses can be depicted with two indexes, one is the strike direction ofthe isoline, and the other is the number of the rhythm extremum area of the directionparallel to the surface of the slope.
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