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本文从理论上分析了具有近线性弹性系数悬丝的扭摆在衰减振动时周期的变化规律,得到了与实验相符的结果,提出了如本底扣除法、双悬丝预应力法等几种消除周期变化影响、提高测量精度的方法。In this papel, the property of variance of period of the torsional pendulum with appto-ximate linear elastic coefficient in damped vibration is analysed theoretically. The results corresponding to experiment are obteined. Several methods used to reduce variance of the period and to improve measurement precision are developed, such as method of eliminating background variance and method of double suspension wires, on which prestressing force is added.
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