Modal Analysis of a Simply Supported Aluminium Plate Structure with and Without a Damping Layer

DOI

10.2991/978-94-6463-252-1_107How to use a DOI?

Keywords

Natural frequency; Vibration modes; Structure; Rectangular plate; Damping layer; Loss factor; Silicon rubber; Neoprene rubber

Abstract

T The modal analysis is one of the most important of the dynamic analyses. Any structure that is analysed at self-weight or without applying external loads is called modal case. In this research paper, there are two modal studies conducted using the numerical method and the finite element method. In the first modal study, without a damping layer, modal analysis is done for isotropic rectangular aluminium plate with two opposite edges simply supported boundaries using finite element analysis. After that, these analyzed values are compared with already published literature results of numerical values of natural frequencies and vibration modes for qualification of finite element procedure. In second study, the isotropic rectangular aluminium plate structure with four edges simply supported boundaries is redesigned as sandwiched into three proportionate layers such that the top layer thickness and bottom layer thickness are optimised with respect to the optimised damping layer- middle layer thickness is determined numerically for various mode shapes of rectangular plate structure without changing any outer dimensions by applying the convergence law of maximum loss factor by using MATLAB. Thereafter, the modal analysis is done separately on plate structure with an application of damping layer and without a damping layer by using finite element analysis. Here, two types of visco-elastic materials are taken for analysis as damping layer such as silicon rubber and neoprene rubber. Finally, the results of natural frequency and vibration modes of rectangular plate with a damping layer are compared with those of a plate without damping layer, and it is observed that the natural frequencies of plate structure are moderately decreased with damping layer.

Copyright

© 2023 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Rama Rao Thatigiri
AU  - Meera Saheb Koppanati
PY  - 2023
DA  - 2023/11/09
TI  - Modal Analysis of a Simply Supported Aluminium Plate Structure with and Without a Damping Layer
BT  - Proceedings of the Second International Conference on Emerging Trends in Engineering (ICETE 2023)
PB  - Atlantis Press
SP  - 1060
EP  - 1076
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-252-1_107
DO  - 10.2991/978-94-6463-252-1_107
ID  - Thatigiri2023
ER  -