地震谱分析

一:已知X八个位移量：m1 7.758831219 -33.142398192 5.489860821 67.044110683 4.959380407 95.610548884 -6.748842002 70.003612335 -4.19055079 -30.853543116 -7.239005941 -18.935793027 3.969587148 -39.62716628 2.000000564 0.004447371再利用Ak=N 艺2t km、，(X cos)求出 A ,mN1A2, A, A, A, A, A, A 的值;B =kA 艺(xNmm=0 siniim S)求出 B ,B ,B ,B ,N京数1234A00B00A17.759B1-4.143A25.49B28.381A34.959B311.951A4-6.749B48.75A5-4.191B5-3.857A6-7.239B6-2.367A73.97B7-4.953A82B80.00056 .接下来通过Ak、Bk的值来算x (A0 =2+ 艺(A coskk=12n ktN At2n kt、A+B sin)+ n/2 coskN At2时间(t)x(t)时间(t) x(t)04.9994.59.9487830450.531.979899885-0.926087091138.053877865.53.9001587341.5-32.94267758611.053497972-19.068390476.5-0.9487746042.5-9.9870912357-6.97492021130.9443537517.5-2.0839666073.5-7.88805020684.950923482m=04-20.08971018B5B6t )，B7, B8 的值:,计算公式是(N/2)t2nN At三：根据八组数据变形x(t)与时间(t)做其函数图形(地震反应谱):