Volume 36, Issue 1 (9-2017)                   JCME 2017, 36(1): 67-84 | Back to browse issues page



DOI: 10.18869/acadpub.jcme.36.1.67

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Hosseinlou F, Mojtahedi A, Lotfollahi M A. Finite Element Model Updating of an Offshore Jacket Platforms using Experimental Modal Analysis. JCME. 2017; 36 (1) :67-84
URL: http://jcme.iut.ac.ir/article-1-683-en.html

1- Department of Civil Engineering, University of Tabriz, Tabriz, Iran , f.hosseinlou@tabrizu.ac.ir
2- Department of Civil Engineering, University of Tabriz, Tabriz, Iran
Abstract:   (463 Views)
An important requirement in design is to be able to compare experimental results from prototype structures with predicted results from a corresponding finite element model. In this context, updating the model using measured vibration test can lead to proposing a desired finite element model. Therefore, this paper presents indirect and direct based numerical updating study of a reduced scale four-story spatial frame structure of offshore jacket platforms constructed and tested at the Structural Dynamics and Vibration Laboratory. Besides, the selection procedure for inactive degrees of freedom in the process of reduced model is evalated, with a reasonable criterion, by using sensitivity analysis of system response under base excitation. This performance leads to faster convergence of iterative algorithm and also, eliminates spurious modes. Since the significant problem fundamental to dynamic structural analysis is the amount of time and cost required for computation, the use of these methods will save both in time and cost.
Full-Text [PDF 1044 kb]   (160 Downloads)    
Type of Study: Research | Subject: Special
Received: 2017/09/5 | Accepted: 2017/09/5 | Published: 2017/09/5

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