一种迭代算法在结构物理参数识别中的应用  

An iterative algorithm applied to structural physical parameter identification

作　　者：王祥建[1] 崔杰[2] 

机构地区：[1]中国地震局工程力学研究所,黑龙江哈尔滨150080 [2]广州大学抗震中心,广东广州510405

出　　处：《地震工程与工程振动》2008年第1期44-50,共7页Earthquake Engineering and Engineering Dynamics

基　　金：地震科学联合基金(106062)

摘　　要：本文在利用复合反演方法进行剪切型结构物理参数识别过程中,引入一种迭代算法来求解关于参数的病态方程组,探讨了几种比例阻尼形式的比例系数识别的处理方法。以10层剪切型框架结构为例,利用该迭代算法研究了无阻尼、三种比例阻尼形式以及噪信比为5%、10%的高斯白噪声等情形下的参数识别问题。结果表明,该迭代算法能很好地求解参数的病态方程组,且对四种阻尼形式和两种噪信比的噪声有很好的适应性。An iterative algorithm is introduced for identifying the physical parameters （stiffness and damping） of shear-type structure by using the compound inversion method. The processing method for three types of proportional damping to estimate the damping coefficients is discussed. The parameter identification of a ten-storey shear-type frame structure has been performed by using the algorithm in the cases of non-damping system, three types of proportional damping system and Gauss white noise with the noise-to-signal of 5% and 10%. The results show that the algorithm has good capability for solving the ill-conditioned equations and has good adaptability for four types of damping and two noise-level noise.

关 键 词：迭代算法 复合反演 最小二乘 参数识别 地震动 

分 类 号：P315.96[天文地球—地震学] TU311.3[天文地球—固体地球物理学]