通过人工激振拉索后，测得拉索的振动波腹点位移衰减时程曲线，计算得拉索的对数衰减率值。
The logarithmic decrement of the cable is then calculated from the free decay curve of the displacement data.
通过人工激振拉索后，测得拉索的振动波腹点位移衰减时程曲线，计算得拉索的对数衰减率值。
The logarithmic decrement of the cable is then calculated from the free decay curve of the displacement data.
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