通过猜想加证明的方式得到了求解刚体定轴转动惯量的一个新推论，由这个推论可以将组合定理进行推广。工程力学上常常遇到的求解形状复杂的均匀刚体的转动惯量时此推论将会特别有用。本文最后通过一道例题，说明它具有简单、快捷的优点，并有独到之处。%We obtain a new conclusion about solution of moment of inertia about a fixed axis by guess and proof in this article ,from the conclusion the com bination theorem of moment of inertia is generalized .It will be specially useful when we frequently confront solving moment of inertia of some com plicated - shaped rigid body on engineering mechanics .In the end we solve a problem for example by this conclusion to show its advantage of simpleness ,convenience and speciality .
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