Research on the iterative method for model updating based on the frequency response function

• Published in: Acta mechanica Sinica Vol. 28; no. 2; pp. 450 - 457
• Main Authors: Li, Wei-Ming, Hong, Jia-Zhen
• Format: Journal Article
• Language: English
• Published: Heidelberg The Chinese Society of Theoretical and Applied Mechanics; Institute of Mechanics, Chinese Academy of Sciences 01.04.2012
• Subjects: Classical and Continuum Physics; Computational Intelligence; Engineering; Engineering Fluid Dynamics; Research Paper; Theoretical and Applied Mechanics; 基础; 太阳能电池板; 有限元模型; 还原技术; 迭代方法; 迭代模型; 迭代法; 频率响应函数; Iteration; Model reduction; Model updating; Frequency response function
• ISSN: 0567-7718; 1614-3116
• DOI: 10.1007/s10409-012-0063-1

Model reduction technique is usually employed in model updating process. In this paper, a new model updat- ing method named as cross-model cross-frequency response function （CMCF） method is proposed and a new iterative method associating the model updating method with the mo- del reduction technique is investigated. The new model up- dating method utilizes the frequency response function to avoid the modal analysis process and it does not need to pair or scale the measured and the analytical frequency re- sponse function, which could greatly increase the number of the equations and the updating parameters. Based on the traditional iterative method, a correction term related to the errors resulting from the replacement of the reduction ma- trix of the experimental model with that of the finite element model is added in the new iterative method. Comparisons be- tween the traditional iterative method and the proposed itera- tive method are shown by model updating examples of solar panels, and both of these two iterative methods combine the CMCF method and the succession-level approximate reduc- tion technique. Results show the effectiveness of the CMCF method and the proposed iterative method .