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A. S. Sekhar
Researcher at Indian Institute of Technology Madras
Publications - 115
Citations - 3162
A. S. Sekhar is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Rotor (electric) & Finite element method. The author has an hindex of 29, co-authored 109 publications receiving 2757 citations. Previous affiliations of A. S. Sekhar include Indian Institute of Technology Kharagpur & Indian Institutes of Technology.
Papers
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Application of discrete wavelet transform for detection of ball bearing race faults
TL;DR: In this paper, a discrete wavelet transform (DWT) was used to detect single and multiple bearing race faults in the ball bearings of the inner race, outer race, and the combination faults.
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Effects of coupling misalignment on vibrations of rotating machinery
A. S. Sekhar,B.S. Prabhu +1 more
TL;DR: In this paper, the rotor bearing system is modelled using higher order finite elements by considering deflection, slope, shear force, bending moment with eight degrees of freedom per node.
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Fault detection in rotor bearing systems using time frequency techniques
N. Harish Chandra,A. S. Sekhar +1 more
TL;DR: In this paper, the rotor startup vibrations are utilized to solve the fault identification problem using time frequency techniques and numerical simulations are performed through finite element analysis of the rotor bearing system with individual and collective combinations of faults.
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Multiple cracks effects and identification
TL;DR: In this paper, the authors summarize the different studies on double/multi-cracks and to note the influences, identification methods in vibration structures such as beams, rotors, pipes, etc.
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Vibration characteristics of a cracked rotor with two open cracks
TL;DR: In this article, Finite Element analysis of a rotor system for flexural vibrations has been considered by including a shaft with two open cracks and the influence of one crack over the other for eigenfrequencies, mode shapes and for threshold speed limits has been observed.