说明：  本程序利用杜修力－陈厚群功率谱，考虑空间二维相干的hao相干函数模型的沿桥纵向地震波
(This procedure using DU Xiu-li- Chen Houqun power spectrum, consider the space of two-dimensional coherence function hao coherent model of the longitudinal seismic waves沿桥)