Structural Parameter Identification Based on Equivalent Single Degree Systems
In order to solve the problems of optimization algorithm used to identify the physical parameters of structures, a new method based on a series of equivalent single degree systems is proposed in this paper. The key idea of the method is that a multi-degree system can be represented by a series of single degree systems that can be identified one by one to perform the identification of the whole system. This method can not only decrease the dimensions of optimization algorithm, but also reduce the amount of estimation work in searching for the bound of parameters, and at the same time improve the identification results when parameters might suddenly change. In the numerical simulation of the physical parameter identification of a multi-degree system, Differential evolution is one of the optimization algorithm methods which are used to identify a series of equivalent single degree systems instead of the multi-degree system they represent, and the identification results prove that the method proposed in this paper is valid.
Daizhong Su, Qingbin Zhang and Shifan Zhu
Y. W. Wang et al., "Structural Parameter Identification Based on Equivalent Single Degree Systems", Key Engineering Materials, Vol. 450, pp. 510-513, 2011