Modeling and Eigenfrequency Analysis of Sound-Structure Interaction in a Rectangular Enclosure with Finite Element Method

Author:

Mohamady Samira1ORCID,Raja Ahmad Raja Kamil1,Montazeri Allahyar2ORCID,Zahari Rizal3,Abdul Jalil Nawal Aswan4

Affiliation:

1. Departement of Electrical and Electronic Engineering, Universiti Putra Malaysia, 43400 UPM SERDANG, Selangor, Malaysia

2. Faculty of Electrical Engineering, Iran University of Science and Technology, Narmak 16846-13114, Tehran, Iran

3. Department of Aerospace Engineering, Universiti Putra Malaysia, 43400 UPM SERDANG, Selangor, Malaysia

4. Departement of Mechanical and Manufacturing Engineering, Universiti Putra Malaysia, 43400 UPM SERDANG, Selangor, Malaysia

Abstract

Vibration of structures due to external sound is one of the main causes of interior noise in cavities like automobile, aircraft, and rotorcraft, which disturb the comfort of passengers. Accurate modelling of such phenomena is required in eigenfrequency analysis and in designing an active noise control system to reduce the interior noise. In this paper, the effect of periodic noise travelling into a rectangular enclosure is investigated with finite element method (FEM) using COMSOL Multiphysics software. The periodic acoustic wave is generated by a point source outside the enclosure and propagated through the enclosure wall and excites an aluminium flexible panel clamped onto the enclosure. The behaviour of the transmission of sound into the cavity is investigated by computing the modal characteristics and the natural frequencies of the cavity. The simulation results are compared with previous analytical and experimental works for validation and an acceptable match between them were obtained.

Publisher

Hindawi Limited

Subject

Mechanics of Materials,Acoustics and Ultrasonics,Building and Construction

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