落体法测定构件惯性矩的几个问题

介绍了利用落体原理测量的构件转动惯量的两种落体方法，即测加速度法和测时法。讨论了这两种落体法的原理，并给出了测量例子。认为，对于某些质量及其转动摩擦力矩未知的对称构件，特别是对于不能从机器内部取出的转子，甚至对于某些不规则的小型构件，可用落体法测量其转动惯量。落体法测量构件惯性矩的优点是：无需添置特殊的测量装置，成本低廉。

SOME PROBLEMS IN THE MEASUREMENT OF INERTIA MOMENT OF CONSTRUCTIONAL ELEMENTS USING FALLING METHODS

Two falling methods, i.e. measuring acceleration method and measuring time method, using falling principle to measure the rolary inertia of constructional elements, are introduced and discussed in this paper, and the examples are given. The methods are suitable to the measurement of rolary inertia of the symmetry elements whose mass and turn friction moment are unknown, esp. to the rotors difficult to be taken out and even to some small irregular elements. The measuring methods have the advantages that it needs no special measuring devices and costs less.