轴向不对称转子转动惯量的测定

Determining Moment of Inertia for the Unsymmetrical Rotors in Axial

叙述了对称三线摆与一般 (不对称 )双线摆的结构原理 ,并根据动量矩原理推导了其微角及大角摆动周期的近似表达式。同时说明了对称三线摆与一般双线摆的重要性质及优点。利用这两种摆可以测定沿轴向不对称分布转子绕轴向与绕径向的转动惯量 ,而且不用任何夹具。当φ0 <4 0°时其测量精度优于 1 %。

In this paper the constitution and principle of a symmetrical trilinear torsion pendulum and a general (namely unsymmetrical) bifilar pendulum were described. Approximate expressions of the oscillating periods were derived from the theory of energy,in small and large angle oscillating for the symmetrical trilinear torsion pendulum and the general bifilar pendulum. Some important oscillating properties and advantages for them were presented in the meantime. The moments of inertia about axial or radial for the unsymmetrical rotors in axial can be measured reliably by using these pendulums without any special fixtures. The accuracies of measurement with such means can be better than 1%, when φ 0<40°.