Abstract
The bending problems of nonuniform beams with variable cross-section can be approximated by that of a step beam under sectionally uniform load (including both concentrated forces and couples). In this paper, the concept of Heaviside function {x−a}0 will be generalized, and a new function {x−a}n,n=0, 1, 2..., will be defined, which may be named as a generalized step function. The rules of operation will also be given to {x−a}n{x−b}0. The reciprocal of the flexural of rigidity 1/EJ and the bending momentM(x) can all be expressed in terms of {x−a}n, and substituted into the differential equation of the elastic curve of the beam respectively. Thus we may establish a set of unified method to solve various types of bending problems of straight beams. The general solution of the deflection equation will be given.
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Xin-san, L., Bao-yuan, X. & Huan-guo, X. Applying the generalized step-function to solve the bending problems of nonuniform beams with variable cross section. Appl Math Mech 2, 365–374 (1981). https://doi.org/10.1007/BF01877402
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DOI: https://doi.org/10.1007/BF01877402