Modal Analysis of Rotor Disc

Rotor discs are critical elements in rotating machinery, directly influencing both operational performance and structural reliability. During service, these components are subjected to dynamic loads, centrifugal forces, and gyroscopic effects, which make them highly prone to vibrations. If left unaddressed, such vibrations can lead to fatigue failure, increased noise levels, reduced efficiency, and even catastrophic breakdowns. Modal analysis serves as an essential tool in understanding the vibrational behaviour of rotor discs by determining their natural frequencies and associated mode shapes. By identifying these parameters, engineers can effectively design systems to avoid resonance conditions, thereby enhancing durability and ensuring safe operation. The present study aims to perform a comprehensive modal analysis of a rotor disc using simulation techniques to evaluate its dynamic response under rotating conditions. The inner edge of the disc is constrained to replicate realistic boundary conditions, and the impact of rotational speed is considered. The analysis focuses on calculating natural frequencies, studying mode shapes, and observing the total and directional deformations corresponding to various modes. Based on the findings, strategies are proposed to optimize the rotor design for improved vibration resistance and overall performance. This work highlights the importance of modal analysis in predictive maintenance, fault diagnosis, and the development of more robust rotating machinery systems.