常微分方程求解过程！主要是使用matlab环境编译的！-ordinary differential equation solving process! Mainly use Matlab environment compiler!

单自由度系统对初始条件和简谐激励相应 由单自由度的运动方程和初始条件得到二阶非齐次常微分方程，它的解有对应的齐次方程的通解和非齐次方程的特接构成。-Single degree of freedom system to initial conditions and the corresponding harmonic excitation Special general solution of the equations of motion and initial conditions b

matlab计算常微分方程，讲解通俗易懂-matlab computing ordinary differential equations, explain straightaway