Abstract: In this paper a numerical method of disarming realty inertia of flywheels is suggest ant. When the method is used, main calculating work is to solve two nonlinear equations. When the generalized league M＝M（φ）, the method is an accurate method. When M＝（φ，ω）, the method is an approximate method. Furthermore, two assailable placow in works [1] and [3] have been pointed in this paper.

Key words: 飞轮, 数值解, 转动惯量