摘要
利用奇异值分解算法对瑞雷波频散曲线进行反演 ,提高横波速度的反演精度 ,引入权重矩阵提高数据分辨率 ,采用自适应修改阻尼因子提高迭代效果并协调分辨率与解的关系。某高速公路软土路基实测资料试算结果表明 ,用该算法对瞬态瑞雷波频散曲线进行反演 ,不但具有稳定性好、精度高、分辨能力强的特点 。
SVD algorithm for inversion of instantaneous Rayleigh wave is proposed in this paper, which improves shear wave precision and resolution by weight matrix, enhances iterarive effect and adjusts the relation between resolution and solution by self-adaptation iterative damping factor. The inversion results of field data for some highway soft roadbed indicate that SVD algorithm not only has good stability, high accuracy and strong resolution, hut also can automatically inverse shear velocity and thickness.
出处
《工程地球物理学报》
2004年第4期304-308,共5页
Chinese Journal of Engineering Geophysics
关键词
奇异值分解
高速公路
软土路基
瞬态瑞雷波
频散曲线
singular value decomposition
highway
soft stratum roadbed
instantaneous Rayleigh wave
dispersion curve
