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Performance of Modal Analysis and Finite Element Analysis


S.C. Sireesha, D. Lakshmi Sravanthi
Pages: 53-64
ISBN: 978-93-5834-732-6


Emerging Trends in Engineering and Technology (Volume -3)

Emerging Trends in Engineering and Technology
(Volume - 3)

Abstract

Modal analysis has become a major technique to solve vibration problem. Finite element method (FEM) and experimental modal analysis (EMA) is a method to measure and analyze the dynamic response of complex structures. These two methods have important role to extract the modal parameters such as such as natural frequency, damping ratio and mode shape. Finite element analysis is engineering software that uses finite element method to analyze and determine the structure design in order to meet the performance criteria. Since the finite element method is computer aided software, so it needs to be design in CAD software such as Abacus, Autodesk Simulation, ANSYS, and CATIA. Experimental modal analysis has grown progressively since the advent of the digital FFT spectrum analyzer. There is several method used in EMA such as impact and shaker test but the frequently used is impact hammer test Finite element analysis (FEA) is a well known numerical technique for determining the dynamic characteristics of any mechanical structure. However, the results obtained by FEA are often error prone due to modelling errors or incorrect boundary conditions. In the present work, the experimental modal analysis of a rectangular plate with known geometric holes is conducted to determine the vibration characteristics

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