非比例阻尼结构参数识别算法的研究  

STUDY ON PARAMETER IDENTIFICATION ALGORITHM FOR STRUCTURE WITH NON-PROPORTIONAL DAMPING

作　　者：王建有[1] 陈键云[1] 林皋[1] 

机构地区：[1]大连理工大学海岸与近海工程国家重点试验室,大连116023

出　　处：《振动与冲击》2005年第3期1-3,18,i001,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金资助(50209002);辽宁省自然科学基金资助项目(20022130)

摘　　要：在地下结构的地震响应中,无限地基的辐射阻尼起着重要的影响,然而其阻尼形式同结构的比例阻尼假定不同。同样,对于施加隔振、减震措施的建筑结构,其系统阻尼也不再满足比例阻尼假定,在结构参数识别中将阻尼阵假定为与刚度阵形式相似的方法不能反映实际结构参数。从研究结构的阻尼模型发发,引入了节点堆积阻尼,这样形成的阻尼与刚度、质量既有一定的联系,又有一定的独立性。以剪切型结构为例对此做了详细说明,结果表明,引入堆积阻尼后,进行参数识别的结构动力学方程是一个非线性识别问题,在此基础上提出了基于最小二乘平均的非线性迭代识别算法。A new damping model called accumulated damping model is introduced. The identification methods for structural parameters are studied and it is concluded that in the case of non-proportional damping, the conventional form of damping matrix which is similar to that of stiffness matrix is not reasonable a and a shear-type structure is taken as example for verification and description. As to the structure with Lumped mass matrix, the accumulated damping model, being put together with the mass related damping model is suggested. On this basis, an iterative algorithm is proposed to identify the parameters including the damping modulus and the stiffness matrix.

关 键 词：识别算法 非比例阻尼 结构动力学方程 结构参数识别 剪切型结构 非线性迭代 地震响应 地下结构 辐射阻尼 无限地基 建筑结构 减震措施 系统阻尼 阻尼模型 识别问题 最小二乘 刚度阵 阻尼阵 独立性 堆积 节点 基础 

分 类 号：TU352.12[建筑科学—结构工程] TP391.41[自动化与计算机技术—计算机应用技术]