Effect of Damping Coefficients on Structural Damage Identification
In the damage identification of linear time-invariant structural systems, the damping coefficients are usually assumed to be constant. These coefficients are not, however, determined in a proper way, which may lead to divergence of the calculation for damage identification based on the measured data in time domain. In order to make up for the shortage, a novel method of setting reasonable damping coefficients according to the characteristic of damage identification, was presented in this paper. With this method, the reasonable damping coefficients can be obtained by means of comparing the measured data of the real system with the simulated ones of the numerical model corresponding to mass-proportional or stiffness-proportional damping. As an example, the numerical analyses based on the proposed method, were carried out with a finite element model of a steel truss, and the results showed that the proposed method was valid.
Structural damage identification Measured data in time domain Damping coefficients Numerical model of a steel truss
Litao Zhang Zhaoxia Li Qingguo Fei
Department of Engineering Mechanics, Southeast University, Nanjing 210096, China
国际会议
南京
英文
802-807
2007-10-16（万方平台首次上网日期，不代表论文的发表时间）