Research and Finite Element Analysis of Circular Braking Plate

Abstract

Noise and vibration associated with the deceleration process in passenger buses has come an important profitable and technological problem in the sedulity.The knowledge of natural frequency of factors is of great interest in the study of the response of structures to various excitations.Hence, a copse slice plate with a central hole, fixed at the inner edge and free at the external edge, is chosen, and its dynamic response is excavated.The ideal of the current discussion work is to anatomize the vibration characteristics as the natural frequency and mode shapes, of copse discs with drilled holes of different compasses,worn discs & enlarged bolt hole fringe discs at the external end due to deceleration but with the same rates of inner to external compass for inner edge clamped and external edge free boundary conditions. Also, the FEM software package is used for vibration analysis of copse discs with the same boundary condition but having different compasses of cooling holes, wear viscosity & enlargedbolt hole compasses for determining different parameters like natural frequency and mode shapes. Thus, results attained are to be compared. This work deals with chancing the natural frequency and mode shapes of slice chaparrals.The slice copse is modelled using marketable computer- backed design( CAD) software, ANSYS.

Introduction

The text focuses on the problem of noise and vibration, particularly "squeal" noise (1.5 to 20 kHz) generated by brake rotors in vehicles. This noise arises from the structural interaction between components like the rotor, pads, caliper, and knuckle, and is influenced by the rotor’s natural frequencies and vibration modes. Brake rotors, often modeled as annular plates with radial holes, are critical in understanding this dynamic behavior.

The study aims to analyze and optimize the rotor’s natural frequencies and mode shapes using Finite Element Method (FEM) via ANSYS software, comparing theoretical and simulation results to improve rotor design and reduce noise. The rotor’s geometry (thickness, inner/outer radius, cooling vane placement) significantly affects vibration characteristics.

The literature review highlights prior research on rotor dynamics, nonlinear vibration theories, smart damping materials, and FEM vibration analysis techniques relevant to brake discs. Theoretical calculations and FEM simulations for natural frequencies of annular discs show good correlation, validating the modeling approach.

The methodology includes creating detailed 3D CAD models using CATIA, meshing these models for FEM, and performing vibration analysis under specific boundary conditions. Results from the simulations are reviewed through post-processing tools to study deformations, stresses, and vibration modes, guiding design improvements to minimize squeal noise and enhance brake performance.

Conclusion

Understanding and mitigating brake \"squeal\" noise is crucial due to its high frequency and its occurrence at the rotor’s natural frequencies and harmonics. Given that rotors in both ventilated and solid core designs serve as critical structural and acoustic elements, their dynamic behavior significantly impacts noise generation. Analyzing rotors as annular plates with radial holes allows for a deeper insight into their vibrational characteristics. Key geometric parameters such as disc thickness, diameters, vane arrangement, and mounting configuration directly influence the rotor’s natural frequencies and consequently its susceptibility to squeal. Therefore, a comprehensive study of these factors is essential, particularly in high-risk applications, to improve noise control and ensure mechanical reliability.Reckoned results have been attained for the annular slice boscage clamped at inner edge and free at the external edge system. • Natural frequentness of slice boscage of bike increases as the slice consistence decreases till first six natural frequentness but rear effect after 7th natural freq.but seventh frequency is changed veritably less. • Natural frequentness of slice boscage of bike decreases as the boscage slice holder hole periphery increases till first 7 natural frequentness but rear effect after 7th natural frequency. • Natural frequentness of slice boscage of bike decreases as the air ventilation hole periphery increases.

References

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Copyright

Copyright © 2025 Mr. Akshay Ashokrao Rakte, Dr. S. H. Sarje, Prof. S. R. Shinde, Prof. A. S. Lanje. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.