参数完全不确定系统在未知输入下的损伤识别  

Damage Identification for Systems without any Structural Parameter Information under Unknown Base Input

作　　者：王建有[1] 陈健云[2] 黄景忠[1] 

机构地区：[1]郑州大学环境与水利学院,郑州450001 [2]大连理工大学土木水利学院,辽宁大连116023

出　　处：《防灾减灾工程学报》2007年第3期335-338,共4页Journal of Disaster Prevention and Mitigation Engineering

摘　　要：由于各种因素的影响,实际结构系统与计算模型有着不小的差异。本文针对结构系统参数及基底输入完全未知情况下的损伤识别问题,构造了与质量无关的结构规格化刚度参数和阻尼参数,提出了关于结构规格化参数和层间质量比的非线性最小二乘迭代优化识别方法,并给出了用规格化参数进行识别损伤和地震动反演的公式。算例表明本方法是有效的。　The realistic structural systems are usually differs from computational model to large extent because of various undetermined causes.In this paper the so-called regularized structural stiffness parameters and damping parameters are constructed for the problems of damage identification without any structural parameters and base input information.The nonlinear least square iteration optimization method with respect to the regularized system parameters and inter-stories mass ratio is proposed.The formula for damage identification and base input inversion in terms of regularized parameters are derived.Numerical examples indicate that the method is reliable.Therefore,this new method can be applied to the practical engineering.

关 键 词：复合反演 损伤识别 参数识别 未知输入 非线性优化 迭代 

分 类 号：O241[理学—计算数学]