此程序可以有效的解决龙哥库塔算法中阶数不足的问题，是一个入门级别的程序，希望对各位有帮助。-may use it to solute the rungekutta problem

模拟三自由度地震响应下的rugekutta算法(Rugekutta algorithm for simulating three degrees of freedom seismic response)

龙格库塔求解微分方程数值解，工程中很多的地方用到龙格库塔求解微分方程的数值解， 龙格库塔是很重要的一种方法，尤其是四阶的，精确度相当的高(Runge Kutta is used to solve the numerical solution of differential equation in many places in the project, Rungekutta is a very important method, especially the fourth-order one,