Keshav Ramesh Shetkar
@tce.co.in
Design Engineer
TATA Consulting Engineers Limited
Skilled Mechanical Design Engineer with demonstrated knowledge of working on various Design tool platforms and proficient in various modeling and simulation softwares. Strong Mechanical and Design Engineering professional with Bachelor of Engineering focused in Mechanical Engineering and Master of Technology in Design Engineering from National Institute of Technology (NIT- Rourkela). Extensive hands-on experience with mechanical systems such as complete diagnosis and repair of two-wheeler Engine and Transmission system. Quick learner possessing strong work ethics and currently working at TATA Consulting Engineers (TCE).
RESEARCH INTERESTS
Artificial Neural Networks, Dynamics, Vibration and Control, Optimization-based Design, Composites.
Scopus Publications
Scholar Citations
Scholar h-index
Scopus Publications
Keshav Ramesh Shetkar and J. Srinivas
Springer Science and Business Media LLC
Keshav Alias Deepesh Ramesh Shetkar and J. Srinivas
Springer Science and Business Media LLC
The conventional materials used in steam turbine blades undergo severe environmental loading conditions resulting in corrosion, fatigue failures, and several kinds of defects. Especially for the last-stage steam turbine blade, there is a need to employ hybrid materials such as functionally graded (FG) materials or other composites that combine the properties of two or more desired materials to withstand extreme conditions without much loss of blade output. The present paper includes the theoretical investigation of free vibration study of the regular last-stage low-pressure steam turbine blade using the Finite element method via the in-house codes. Further, the structural modeling of the functionally graded blade and its free vibration characteristics are evaluated. The dynamic equations of motion of the functionally graded blade are derived by considering geometric taper. The impact of several factors, such as the volume fraction index, rotational speed, and twist angle on the natural frequencies of the FG rotating blade, is reported at different speeds of operation. It is observed that with an increase in volume fraction index, both chordwise and flapwise bending frequencies decrease; however, the rate of decrease is higher in higher modes. The opposite trend is observed in the FG blade’s vibratory characteristics with respect to the rotational speed and twist angle.