Journal of Mechanical Design and Vibration

ISSN (Print): 2376-9564

ISSN (Online): 2376-9572

Editor-in-Chief: Shravan H. Gawande

Website: http://www.sciepub.com/journal/JMDV

   

Article

Damage Identification in Composite Beam by Vibration Measurement and Fuzzy Inference System

1Department of Mechanical Engineering, National Institute of Technology, Rourkela, India


Journal of Mechanical Design and Vibration. 2015, 3(1), 8-23
doi: 10.12691/jmdv-3-1-2
Copyright © 2015 Science and Education Publishing

Cite this paper:
Irshad Ahmad Khan, Dayal Ramakrushna Parhi. Damage Identification in Composite Beam by Vibration Measurement and Fuzzy Inference System. Journal of Mechanical Design and Vibration. 2015; 3(1):8-23. doi: 10.12691/jmdv-3-1-2.

Correspondence to: Dayal  Ramakrushna Parhi, Department of Mechanical Engineering, National Institute of Technology, Rourkela, India. Email: irshadak85@gmail.com, drkparhi@nitrkl.ac.in

Abstract

A significant efforts have been done by scientists and researchers in the last few years to develop many non-destructive techniques for damage recognition in a beam like dynamic structures. In this paper, theoretical, numerical, fuzzy logic methods employed for diagnosis of damage in the form of cracks of the cantilever composite beam with an aim to detect, quantify, and determine its intensity and locations. The Glass fiber reinforced epoxy composite engaged in the analysis due to high strength and stiffness-to-weight ratios. The theoretical analysis is performed to get the relationship between change in natural frequencies and mode shapes for the cracked and non-cracked composite beam. The Numerical analysis is performed on the cracked composite beam to get the vibration parameters such as natural frequency and mode shape, which is used to design fuzzy logic, based smart artificial intelligent technique for predicting crack severity and its intensity. Online fuzzy based smart technique has been developed, first three natural frequencies and mode shapes used as input parameters, Gaussian membership functions is considered to detect cracks location and depth. The results of theoretical and numerical analysis are compared with experimental results having good agreement with the results predicted by the fuzzy inference system.

Keywords

References

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Article

Dynamic Modeling of PGT using Analytical & Numerical Approach

1Department of Mechanical Engineering, M. E. Society’s College of Engineering, Pune, S.P. Pune University, Maharashtra, India


Journal of Mechanical Design and Vibration. 2015, 3(1), 24-30
doi: 10.12691/jmdv-3-1-3
Copyright © 2015 Science and Education Publishing

Cite this paper:
S. S. Ghorpade, A. B. Kadam, D.A. Mane, S. H. Gawande, S. N. Shaikh. Dynamic Modeling of PGT using Analytical & Numerical Approach. Journal of Mechanical Design and Vibration. 2015; 3(1):24-30. doi: 10.12691/jmdv-3-1-3.

Correspondence to: S.  S. Ghorpade, Department of Mechanical Engineering, M. E. Society’s College of Engineering, Pune, S.P. Pune University, Maharashtra, India. Email: saudamini1994@gmail.com

Abstract

Gears are one of the most critical components in industrial rotating machinery. There is a vast amount of literature on gear modelling. The objectives in dynamic modelling of gears has varied from vibration analysis and noise control, to transmissions errors and stability analysis over at least the past five decades. The ultimate goal of this paper is to perform planetary gear train modeling as in [1] to study the effect deflection and stresses on surface pitting and scoring. This paper is an extension of the work performed by the authors as in [1], in which the experimental work was carried out to study the effect of planet phasing on noise and subsequent resulting vibrations of Nylon-6 planetary gear drive.

Keywords

References

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[18]  R.G. Parker, “A physical explanation for the effectiveness of planet phasing to suppress planetary gear vibration”. Journal of Sound and Vibration, 236(4), 561-573, 2000.
 
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[20]  R.G. Parker, V. Agashe, S.M. Vijayakar, “Dynamic response of a planetary gear system using a finite element/contact mechanics model”. Journal of Mechanical Design, 122(3), 304-310, 2000.
 
[21]  A. Kahraman, S.M. Vijayakar, “Effect of internal gear flexibility on the quasi-static behavior of a planetary gear set”. Journal of Mechanical Design,123(3), 408-415, 2001.
 
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Article

Vibration Control of an Electromechanical Model with Time-Dependent Magnetic Field

1Department of Mathematics, Faculty of Science, Al-Azhar University, Gaza, Palestine


Journal of Mechanical Design and Vibration. 2016, 4(1), 1-9
doi: 10.12691/jmdv-4-1-1
Copyright © 2016 Science and Education Publishing

Cite this paper:
Usama H. Hegazy, Jihad Y. Abu Ful. Vibration Control of an Electromechanical Model with Time-Dependent Magnetic Field. Journal of Mechanical Design and Vibration. 2016; 4(1):1-9. doi: 10.12691/jmdv-4-1-1.

Correspondence to: Usama  H. Hegazy, Department of Mathematics, Faculty of Science, Al-Azhar University, Gaza, Palestine. Email: uhijazy@yahoo.com, u.hejazy@alazhar.edu.ps

Abstract

This paper presents a study of the nonlinear response of the electromechanical (seismograph) system under parametric excitations in the mechanical and electrical parts with periodically time-varying magnetic field. The case of subharmonic (parametric) resonance is considered and examined. Approximated solutions are sought applying the method of multiple scales. Numerical simulations are carried out to illustrate the steady-state response and the stability of the solutions using the frequency response function and time series solution.

Keywords

References

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