测量不规则棒体径向惯性矩的一般双线摆──动量矩法

The general bifilar torsion pendulum of measuring radial moment of inertia for irregular stick shape bodies──Method of moment of momentum

根据动量矩法阐述了该摆微角与大角摆动周期的近似解法，同时还说明了该摆的某些特点。用这种方法可以测量中小型不规则棒形构件的惯性矩（转动惯量），并且可以不用专用卡具。当摆角ψ0＜40°时，该摆的测量准确度优于1％。

This paper describes the structure and principle of a bifilar torsion pendulum in its general (unsymmtrical) form. The approximate expressions of the oscillating peried for small and large oscillations of general bifilar torsion pendulum arederived according to the theory of moment of momentum. Some important oscilllating properties and advantages arepasented, The moment of small-sized irregular stick shaped objects around a radial bos may be measured reliably withoutany special fixture. When ψ＜40, the aceuracy of measuremnt is better than 1%.