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Force Appropriation Method for Two Degrees of Freedom Nonlinear System

M. S. M., Sani and Muhamad Norhisham, Abdul Rani and Mohd Azmi, Yunus and Ahmad Azlan, Mat Isa and Liyana, Roslan (2015) Force Appropriation Method for Two Degrees of Freedom Nonlinear System. Jurnal Teknologi (Sciences and Engineering), 76 (8). pp. 5-9. ISSN 0127-9696 (print); 2180-3722 (online)

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Abstract

In this paper, the vibrations of structures are investigated via force appropriation method in which modes are excited individually by forces. Multivariate mode indicator function (MMIF) is used in the modal testing for investigating the prospective nonlinearities in the structures. The method is applied to simulate two degree of freedom with simple nonlinearities. The results are presented and evaluated to indicate that the method has advantages when it comes to involving in mode by mode identification. Results calculated from modal assurance criteria (MAC) and modal purity indicator (MPI) show that the qualities of evaluating a pure normal mode are in satisfactory. This suggests that force appropriation method for nonlinear structures is reliable and efficient, particularly in terms of the isolation of individual modes and determination of high quality modal parameters.

Item Type: Article
Uncontrolled Keywords: Force appropriation, nonlinear, vibration, multivariate mode indicator function
Subjects: T Technology > TJ Mechanical engineering and machinery
Faculty/Division: Faculty of Mechanical Engineering
Depositing User: Mrs. Neng Sury Sulaiman
Date Deposited: 04 Dec 2015 01:31
Last Modified: 22 Jan 2018 08:03
URI: http://umpir.ump.edu.my/id/eprint/11151
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