A new critical moment formula of tapered beam is proposed, which is similar to the expression for beams with uniform cross-section.
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。
2
The deformations and the internal forces at a cross sectionof a beam are taken as state variables to formulate a general equation for computing the natural frequencies of non-uniform beams.
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。
3
The dynamic response of a free free beam with uniform rectangular cross section subjected to impact by a mass at both free end is analyzed theoretically.