By use of the continuous conditions between adjoining sections,ge- neral formulas of internal forces and displacements are derived and the prob- lem finally becomes to solve a simultaneous linear equations with two unk- nowns.

• 然后给出每一小段用初参数表示的解,再利用各段之间的连续条件,给出内力与位移的一般表达式,并最后将问题归结为一个二元一次方程组的求解。