An investigation on structural dynamic modification of a machine casing

Hanouf, Zahir and Abdelrahman, Ahmed and Ahmad, Kartini (2022) An investigation on structural dynamic modification of a machine casing. In: 5th International Conference on Mechanical, Automotive and Aerospace Engineering (ICMAAE 2021), 21-23 June 2021, Kuala Lumpur, Malaysia.

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Abstract

Investigation on structural dynamic characteristic is a crucial step in the noise, vibration and harshness (NVH) analysis in order to enhance the structural vibration, which subsequently contribute to improving the acoustical environment. The excitation of the structure can produce high vibration which could be transferred to the other parts of the body, then lead to high noise radiating components. Structural dynamic modification is one of the important techniques in the design of mechanical structures. It is an application of experimental modal analysis technique to investigate the effect of the physical and geometrical parameters on the dynamic properties of the structures such as frequencies and mode shapes. This paper investigates the dynamic properties of a machine casing structure which is extensively used in industrial applications. This investigation had successfully produced natural frequencies and their associated mode shapes of such open box for the original structure and modified structure. The study establishes the step-by-step procedures to carry out experimental modal analysis on the structures, using single input excitation and single output responses (SISO) technique. To ensure the validity of the results obtained an inverse method was done by fixing the response and moving the excitation. The results found were absolutely the same. Finally, comparison between results obtained from analysis showed significant differences on both frequencies and mode shapes.

Item Type:	Conference or Workshop Item (Plenary Papers)
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ227 Machine design and drawing
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Science
Depositing User:	dr kartini ahmad
Date Deposited:	23 Aug 2022 10:56
Last Modified:	23 Aug 2022 10:56
URI:	http://irep.iium.edu.my/id/eprint/99557

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