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t 我们读了《机械制造》1987年第8期“国外书刊摘要”专栏,摘译自《Maehine Design》,介绍W.H. Macauley的“计算梁挠度的新方法”一文,觉得有以下几点尚可改进,现讨论于下,供参考,望指正。 (1)初步估计max y处。最大挠度处为dy/dx=0处。最大弯矩处为dM/dx=d~3y/dx~3=0处,也即切力V=0处。从原文(图2)可知,V=0处为: x=13+(2060-800-1000)/15=14.74 in 最大挠度处一般说来在最大弯矩处左右。为此我们可估计max挠度y在均布荷重区域。 (2)选择最佳弯矩方程。由于右侧荷重简单,故从右侧起建立弯矩方程比
We read the section entitled “Foreign Abstracts of Foreign Abstracts”, Volume 8, 1987, excerpted from “Maehine Design” and introduced WH Macauley’s “New Method of Calculating Deflection of Beams,” in the following article Improvement, discussion is under, for reference, hope correct. (1) a preliminary estimate of max y Department. The maximum deflection is at dy / dx = 0. The maximum bending moment is dM / dx = d ~ 3y / dx ~ 3 = 0, that is, the shear force V = 0. From the original text (Fig. 2), we can see that V = 0 is: x = 13 + (2060-800-1000) /15=14.74in The maximum deflection is generally about the maximum bending moment. To this end we can estimate max deflection y in the area of uniform load. (2) choose the best bending moment equation. Since the load on the right side is simple, the ratio of the moment equations is established from the right side