提出了新的变截面梁临界弯矩计算式，其表达形式与等截面梁的公式相同，便于工程应用。
A new critical moment formula of tapered beam is proposed, which is similar to the expression for beams with uniform cross-section.
导出了用变形、内力作为混合状态变量表示的求解等截面梁的横向振动固有频率的普遍方程。
The deformations and the internal forces at a cross section of a beam are taken as state variables to formulate a general equation for computing the natural frequencies of non-uniform beams.
在设计中当等截面连续梁的计算跨度相差不超过10%时，可用等跨的图表来进行内力计算。
When actual span D-value of equal section continuous beam in designs is less 10%, equal span chart is employed to calculate internal force.
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