平面刚架以单元截面特性为变量的解析解

The Analytical Solution with Respect to Characteristics of Elements′ Cross Section as Variables of the Plane Frame

取平面刚架单元截面面积与抗弯惯矩为变量，采用符号计算软件求解含变量的总刚度阵之逆，从而得到这种意义下的解析解·在微机上编制了通用的程序，计算出了相应的算例·

Taking the sectional area and the bending moment of inertia as variables for each beam element, the plane frame will possess a stiffness matrix containing parameters. In terms of the symbolic computation software, the inverse matrix is solved to obtain the new analytical solution with respect to characteristics of elements cross section. The general program is coded in the micro computer and corresponding examples are computed.