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本文采用奇异函数建立简支梁的挠曲线方程，进而推出等截面连续梁的三弯矩方程的新形式。本方程比传统的三弯矩方程简捷方便。
In this paper, the singular function is used to establish the deflection curve of simply supported beams, and then the new form of the three moment equations of continuous beams with equal cross section is deduced. The equation is simpler and convenient than the traditional three-moment equation.