The prediction of the dynamic behaviour of a structure using model updating and frequency based substructuring

W. I. I., Wan Iskandar Mirza and M. N., Abdul Rani and M. A., Yunus and M. S. M., Sani and M. S., Mohd Zin (2019) The prediction of the dynamic behaviour of a structure using model updating and frequency based substructuring. In: IOP Conference Series: Materials Science and Engineering, 1st South Aceh International Conference on Engineering and Technology (SAICOET), 8-9 December 2018 , Politeknik Aceh Selatan Campus, Indonesia. pp. 1-7., 506 (012011). ISSN 1757-8981 (Print), 1757-899X (Online)

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Combining analytical with experimental data to predict the dynamic behaviour of an assembled structure via the frequency based substructuring (FBS) method, is a common practice in the field of structural dynamics. However, the accuracy of the dynamic behaviour predicted from the FBS method relies heavily on the quality of experimental frequency response function (FRF) of the interfaces on which, in practice, it is very difficult to obtain. In addition, the accuracy of the FBS method is highly dependent on experimental rotational degrees of freedom (DOF) which are always found to be very difficult to measure accurately. Therefore, this paper proposes a new frequency response function (FRF) coupling scheme that may uniquely address the difficulties and improve the quality of predicted results of the FBS method. The scheme is formulated based on the finite element method, model updating technique and experimental modal analysis. A simplified finite element model of a physical test substructure is developed to generate rotational FRF data by reconciling the initial FE model using the model updating technique. It was found that the scheme adopted allows generating full translational and rotational degrees of freedom data and leads to a significant improvement in the FRF coupling process between the analytical and experimental model in the FBS method.

Item Type: Conference or Workshop Item (Lecture)
Additional Information: Indexed by Scopus
Uncontrolled Keywords: Structural dynamics; Frequency based substructuring; Model updating; Experimental modal analysis
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TJ Mechanical engineering and machinery
T Technology > TL Motor vehicles. Aeronautics. Astronautics
Faculty/Division: Faculty of Mechanical Engineering
Depositing User: Mrs Norsaini Abdul Samat
Date Deposited: 30 Oct 2019 07:26
Last Modified: 30 Oct 2019 07:26
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