Author: Mrs. K.Tulasi, D.Aadarsh, T.Mukesh Sathwik, K.Mohan Sai, T.Naga Durga Eswara Suresh
Doi: https://jmeb.2026.v11.i01.pp43-53
Abstract:
Brake squeal is a friction-induced vibration phenomenon commonly observed in automotive braking systems and represents a major noise, vibration, and harshness (NVH) concern. Although it does not directly affect braking performance, squeal significantly impacts passenger comfort and perceived vehicle quality. This study presents a finite element–based investigation of the dynamic behavior and squeal propensity of a brake disc–pad assembly using complex eigenvalue analysis. A three-dimensional model of the brake system is developed, incorporating frictional contact, prestress effects, and realistic boundary conditions. Linear non-prestressed modal analysis and full nonlinear perturbed modal analysis are performed and compared to evaluate the influence of friction-induced coupling on system stability. The results reveal the presence of unstable vibration modes in the high-frequency range, indicating potential squeal occurrence. Mode shape analysis confirms that squeal originate
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