Physical parameter identification of unrestrained nonclassically damped systems

摘要：

　　In structural identification,modal parameters identified from input-output vibration data are often used to estimate the physical parameters(mass,damping,stiffness)of the system.In this paper,a method for determining the physical parameters of unrestrained non-classically damped system is presented.For such systems,the rigid body modes present a difficulty when going from the complex modal parameters to the physical parameter matrices.To address this problem,a new normalization scheme for the complex mode shapes is developed,starting from the complex eigenvalue problem.Further,a method based on the eigenvalue problem is developed to sequentially estimate the complete physical parameter matrices,starting from spatially incomplete complex modes,encountered in situations when not all active degrees of freedom of the system are instrumented.The method is illustrated through appropriate numerical examples.

关键词： physical parameter identification unrestrained system rigid body mode nonclassically damped incomplete instrumentation

作者: C.K.Sharma M.S.Chauhan S.Mukhopadhyay

作者单位: Department of Civil Engineering,Indian Institute of Technology,Kanpur,India Department of Civil Engineering,Johns Hopkins University,Baltimore,USA

会议类型: 国际会议

会议名称: The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)

会议地点: 青岛

会议语种:英文

页码: 2237-2242

在线出版日期: 2018-07-22（万方平台首次上网日期，不代表论文的发表时间）