In order to obtain elastic stiffness matrices and geometry stiffness matrices that do not depend on subdivision of the element for convergence , the displacement functions are expressed in terms of the geometry properties of the section and this consideration leads to the formulation of exact stiffness matrices for linear elastic analysis given in this paper 本文利用有限元方法對(duì)變截面梁單元進(jìn)行研究。為了得到精度不依賴于劃分單元數(shù)目多少的彈性、幾何剛度矩陣,本文采用變截面構(gòu)件幾何特性積分所獲得的軸向、側(cè)向位移函數(shù)。