• Version
• Download 16
• File Size 421.22 KB
• File Count 1
• Create Date 1 August 2025
• Last Updated 1 August 2025

Modal Analysis of a cantilever beam using Finite Element Method and its Experimental Validation

Prasad J Waste1, Bhagwan F Jogi1, Debdatta Ratna2, Hemant Warhatkar1, Bikash Chakraborty2,

Nitin Ahire2, Vishal Dalvi2

 1Dr. Babasaheb Ambedkar Technological University, Lonere, Maharashtra, India

 2Naval Materials Research Laboratory (DRDO), Ambernath, Maharashtra, India

Abstract - Modal analysis is a type of dynamic analysis that focuses on studying the response of a mechanical structure to dynamic loads at its natural frequencies. Modal analysis is conducted to determine the natural frequencies and mode shapes of the structure. In this paper, modal analysis of a cantilever beam to obtain natural frequencies and mode shapes is carried out using two FEA software, ANSYS and ABAQUS.  The pattern of motion exhibited by a vibrating beam structure to the corresponding natural frequencies to the excitation force is simulated in the form of mode shape using FEA software ANSYS and ABAQUS. The cantilever beams are important structural members in varieties of engineering applications. Model developed in FEA software is validated by comparing the results of the simulation to experimental data to ensure that the model accurately represents the behaviour of the real system. The natural frequencies obtained through finite element analysis software are compared with the natural frequencies obtained experimentally and are found in good agreement. The Frequency Response Function (FRF) is measured experimentally that signifies the magnitude of the structure’s response at different frequencies over a predetermined range of frequencies. Modal analysis helps engineers and designers to understand the dynamic behaviour of structures, to predict and mitigate potential resonance related issues, ensuring the safety, reliability, and performance of structures under dynamic loads.

Key Words:  Modal Analysis, Natural Frequency, Resonance, Mode Shapes, FEA.