51cg

People

Dr Tamer Elsayed

Dr Tamer Elsayed
Dr Tamer Elsayed
Dr Tamer Elsayed

Honorary Research Fellow

51cg
School/Department
School of Engineering

Biography

Honrary research fellow in Centre for Applied Dynamic Research

Prof. Mechanical Design Department, Helwan University.(2021-now).

Associate Prof. Mechanical Design Department, Helwan University.(2016-2020).

Assistant Prof.  Mechanical Design Department, Helwan University.(2011-2020).

PhD in Engineering - Sheffield University (Ph.D. Title: Modelling The Strengthening Of Glass Using Epoxy Based Coatings).

Master- Helwan University (M.Sc. Title: The Fatigue Behaviour of Polymeric Materials)

External Memberships

Reviewer of

International Journal of Mechanical Sciences

Applied Mathematical Modelling.

Structural Engineering and Mechanics.

International Journal of Pressure Vessels and Piping.

Scientia Iranica.

Engineering research Journal.

Latest Publications

  • Advances in the Dynamics of Pipes Conveying Fluids: A Review

    El-Sayed, T. A., Taima, M. S., Shoukry, F. E., Ahmed, M. M. Z.
    Vibration, vol. 9, no. 2, 40
    Contributions to Journals: Review articles
    • [ONLINE] DOI:
    • [OPEN ACCESS]

  • Semi-analytical model for rub dynamics to investigate whirling

    El-Mongy, H., El-Sayed, T., Vaziri, V., Wiercigroch, M.
    Journal of Vibration and Control
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [ONLINE]

  • Reducing computational time in Floquet theory for the stability of rotating tapered 2D-FGM beams using Bolotin's first-order method

    Taima, M., El-Sayed, T., Ramadan, M., Friswell, M.
    Engineering Computations Journal, pp. 1-25
    Contributions to Journals: Articles
    • [ONLINE]
    • [ONLINE] DOI:

  • Coupled journal and thrust bearing dynamics considering five degree of freedom model and using second-order bearing coefficients

    Elsayed, E. K., El-Sayed, T. A., Sayed, H.
    Physics of Fluids, vol. 37, no. 10, 104111
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [ONLINE]

  • Dynamic stability analysis of tapered rotating beams with 2D functionally graded materials: A comparative study of Floquet theory approaches

    Taima, M. S., El-Sayed, T. A., Friswell, M. I.
    Thin-walled Structures, vol. 213, 113257
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [ONLINE]

View My Publications

Research

Research Overview

1- Modelling the dynamics of BHA:

Modelling the lateral vibrations of drill strings used in oil field industry.

2-Vibration of continuous systems:

Research is focused on obtaining exact and/or numerical solutions for complicated structural and mechanical systems. The exact solution includes the use of several algorithms in order to solve sophisticated beam or plate problems. The analytical solution includes new modifications to some mathematical methods such as variational iteration method. Recently, research is carried out on the dynamics of nano-beams.

3-Fluid structure interaction:

This work includes the investigation of the stability of pipe conveying fluids. Most recent research is focused on the fluid structure interaction resulting from water hammer.

4- Design of hydraulic turbomachinery:

Research in this area is focused on computational fluid dynamics analysis for several turbomachines such as high speed pumps, reciprocating pumps and turbocharger. It also included investigating the dynamic characterastics of journal bearings and modelling the nolinear vibrations of the turbomachinary rotors mounted on journal bearings.

 

 

Publications

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  • Advances in the Dynamics of Pipes Conveying Fluids: A Review

    El-Sayed, T. A., Taima, M. S., Shoukry, F. E., Ahmed, M. M. Z.
    Vibration, vol. 9, no. 2, 40
    Contributions to Journals: Review articles
    • [ONLINE] DOI:
    • [OPEN ACCESS]

  • Semi-analytical model for rub dynamics to investigate whirling

    El-Mongy, H., El-Sayed, T., Vaziri, V., Wiercigroch, M.
    Journal of Vibration and Control
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [ONLINE]

  • Reducing computational time in Floquet theory for the stability of rotating tapered 2D-FGM beams using Bolotin's first-order method

    Taima, M., El-Sayed, T., Ramadan, M., Friswell, M.
    Engineering Computations Journal, pp. 1-25
    Contributions to Journals: Articles
    • [ONLINE]
    • [ONLINE] DOI:

  • Coupled journal and thrust bearing dynamics considering five degree of freedom model and using second-order bearing coefficients

    Elsayed, E. K., El-Sayed, T. A., Sayed, H.
    Physics of Fluids, vol. 37, no. 10, 104111
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [ONLINE]

  • Dynamic stability analysis of tapered rotating beams with 2D functionally graded materials: A comparative study of Floquet theory approaches

    Taima, M. S., El-Sayed, T. A., Friswell, M. I.
    Thin-walled Structures, vol. 213, 113257
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [ONLINE]

  • A Novel Method for Deriving High-Order Frequency Equations with Applications to Cantilever Beam Vibrations

    Farghaly, S. H., Elsayed, T.
    Journal of Vibration Engineering & Technologies, vol. 13, no. 2, 196
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [OPEN ACCESS]

  • Nonlinear dynamics of whirling rotor with asymmetrically supported snubber ring

    El-Mongy, H. H., El-Sayed, T. A., Vaziri, V., Wiercigroch, M.
    Machines, vol. 12, no. 12, 897
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [OPEN ACCESS]
    • [ONLINE]

  • Unveiling the impact of pipe materials on water hammer in pressure pipelines: an experimental and numerical study

    Kandil, M., El-Sayed, T. A., Kamal, A. M.
    Scientific Reports, vol. 14, no. 1, 30599
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [OPEN ACCESS]
    • [ONLINE]

  • Nonlinear dynamics analysis of hydraulic turbochargers in reverse osmosis desalination plants

    Sayed, H., Elsayed, T., Friswell, M. I., El-Mongy, H.
    Nonlinear Dynamics, vol. 112, pp. 18817–18846
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [OPEN ACCESS]

  • A Comparative Study of Theoretical and Experimental Analysis on Balanced and Unbalanced Rotors Supported by Oil- and Water-Lubricated Journal Bearings

    Ahmed, O., El-Sayed, T. A., Sayed, H.
    Machines, vol. 12, no. 10, 675
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [OPEN ACCESS]
    • [ONLINE]

  • Finite element analyses of rotor/bearing system using second-order journal bearings stiffness and damping coefficients

    Ahmed, O., El-Sayed, T. A., Sayed, H.
    JVC/Journal of Vibration and Control, vol. 30, no. 17-18, pp. 3961-3984
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [OPEN ACCESS]
    • [ONLINE]

  • Effect of Groove Depth on Herringbone Thrust Bearing Dynamic Coefficients

    Elsayed, E. K., Sayed, H., El-Sayed, T. A.
    Chapters in Books, Reports and Conference Proceedings: Conference Proceedings
    • [ONLINE] DOI:
    • [OPEN ACCESS]
    • [ONLINE]

  • Fatigue Failure in Polymeric Materials: Insights from Experimental Testing

    Naga, S. A. R., Elsayed, T.
    Journal of Failure Analysis and Prevention, vol. 24, no. 2, pp. 922-935
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [OPEN ACCESS]
    • [ONLINE]

  • Analysis of Second-Order Thrust Bearing Coefficients Considering Misalignment Effect

    Elsayed, E. K., Sayed, H., Elsayed, T.
    Journal of Vibration Engineering & Technologies, vol. 12, pp. 1957–1977
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [OPEN ACCESS]

  • Frequency Ratio Effects on Dynamic Behavior of Rotor-Bearing System

    Zaghlol, M. G., Sayed, H., El-Sayed, T. A.
    Chapters in Books, Reports and Conference Proceedings: Conference Proceedings
    • [ONLINE] DOI:
    • [ONLINE]

  • Thermal vibration analysis of cracked nanobeams submerged in elastic foundations by nonlocal continuum mechanics

    Taima, M. S., El Sayed, T., Friswell, M. I.
    Thin-walled Structures, vol. 193, 111249
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [OPEN ACCESS]

  • A nontraditional method for reducing thermoelastic stresses of variable thickness rotating discs

    Eldeeb, A. M., Shabana, Y. M., El-Sayed, T. A., Elsawaf, A.
    Scientific Reports, vol. 13, 13578
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [OPEN ACCESS]
    • [ONLINE]

  • Comparative study on free vibration analysis of rotating bi-directional functionally graded beams using multiple beam theories with uncertainty considerations

    Taima, M. S., Shehab, M. B., El-Sayed, T. A., Friswell, M. I.
    Scientific Reports, vol. 13, no. 1, 17917
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [OPEN ACCESS]
    • [ONLINE]

  • Continuation Analysis of Rotor Bearing Systems Through Direct Solution of Reynolds Equation

    Sayed, H., El-Sayed, T. A., Friswell, M. I.
    Chapters in Books, Reports and Conference Proceedings: Conference Proceedings
    • [ONLINE] DOI:
    • [OPEN ACCESS]
    • [ONLINE]

  • Dynamic Analysis of Double-Tapered Rotating Beams Composed of Bidirectional Functionally Graded Materials (BFGMs)

    Taima, M. S., El-Sayed, T. A., Friswell, M. I.
    Chapters in Books, Reports and Conference Proceedings: Conference Proceedings
    • [ONLINE] DOI:
    • [OPEN ACCESS]
    • [ONLINE]

  • An Investigation into the Free Vibration of Intact and Cracked FGM Plates

    Shehab, M. B., Taima, M. S., Sayed, H., Elsayed, T.
    Journal of Failure Analysis and Prevention, vol. 23, pp. 2142-2168
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [OPEN ACCESS]
    • [ONLINE]

  • Vibration analysis of cracked beam based on Reddy beam theory by finite element method

    Taima, M. S., El-Sayed, T. A., Shehab, M. B., Farghaly, S. H., Hand, R. J.
    JVC/Journal of Vibration and Control, vol. 29, no. 19-20, pp. 4589-4606
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [ONLINE]

  • Approximating fluid bearing characteristics using polynomials for the nonlinear dynamics of rotating machines

    El-Sayed, T. A., Friswell, M. I., Sayed, H.
    Tribology International, vol. 187, 108669
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [ONLINE]
    • [ONLINE]

  • Thermoelastic Stresses Alleviation for Two-Dimensional Functionally Graded Cylinders Under Asymmetric Loading

    Eldeeb, A., Mohamed Shabana, Y., Elsayed, T., Guo, L., Elsawaf, A.
    Journal of Thermal Stresses, vol. 46, no. 1, pp. 59-74
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [OPEN ACCESS]

  • Piecewise Analytical Solution for Rub Interactions Between a Rotor and an Asymmetrically Supported Stator

    El-Mongy, H., El-Sayed, T., Vaziri, V., Wiercigroch, M.
    Chapters in Books, Reports and Conference Proceedings: Conference Proceedings
    • [ONLINE] DOI:
    • [OPEN ACCESS]

  • Longitudinal Vibration Analysis of a Stepped Nonlocal Rod Embedded in Several Elastic Media

    Elsayed, T., Taima, M. S., Farghaly, S. H.
    Journal of Vibration Engineering & Technologies, vol. 10, no. 4, pp. 1399–1412
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [OPEN ACCESS]

  • Nonlinear dynamics and bifurcation analysis of journal bearings based on second order stiffness and damping coefficients

    Sayed, H., Elsayed, T.
    International Journal of Non-Linear Mechanics, vol. 142, 103972
    Contributions to Journals: Articles
    • [ONLINE] DOI:

  • A new numeric-symbolic procedure for variational iteration method with application to the free vibration of generalized multi-span Timoshenko beam

    Elsayed, T., El-Mongy, H.
    JVC/Journal of Vibration and Control, vol. 28, no. 7-8, pp. 799-811
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [ONLINE]

  • Bifurcation analysis of rotor/bearing system using third-order journal bearing stiffness and damping coefficients

    Elsayed, T., Sayed, H.
    Nonlinear Dynamics, vol. 107, pp. 123-151
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [OPEN ACCESS]

  • Analytical study of rotor-stator rubbing phenomenon

    Elsayed, T., El-Mongy, H., Vaziri, V., Wiercigroch, M.
    Contributions to Conferences: Papers

  • Micro-fabrication of ceramics: Additive manufacturing and conventional technologies

    Hassanin, H., Essa, K., Elshaer, A., Imbaby, M., El-Mongy, H. H., El-Sayed, T. A.
    Journal of advanced ceramics, vol. 10, pp. 1-27
    Contributions to Journals: Review articles
    • [ONLINE] DOI:
    • [OPEN ACCESS]
    • [ONLINE]

  • Effect of pipematerials on water hammer

    Kandil, M., Kamal, A. M., El-Sayed, T. A.
    International Journal of Pressure Vessels and Piping, vol. 179, 103996
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [ONLINE]

  • Experimental and computational investigation of energy ball wind turbine aerodynamic performance

    Elshazly, E., Eltayeb, N., Abdel Fatah, A. A., El-Sayed, T. A.
    Advances in Mechanical Engineering, vol. 11, no. 10, pp. 1-15
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [OPEN ACCESS]
    • [ONLINE]

  • Free vibration and stability analysis of a multi-span pipe conveying fluid using exact and variational iteration methods combined with transfer matrix method

    El-Sayed, T. A., El-Mongy, H. H.
    Applied Mathematical Modelling, vol. 71, pp. 173-193
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [ONLINE]

  • Investigating the performance of reciprocating high-pressure pumps in constant recovery small RO desalination plants

    El-Sayed, T. A., Fatah, A. A.
    Desalination and Water Treatment, vol. 143, pp. 78-87
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [ONLINE]

  • Frequency equation using new set of fundamental solutions with application on the free vibration of Timoshenko beams with intermediate rigid or elastic span

    El-Sayed, T. A., Farghaly, S. H.
    JVC/Journal of Vibration and Control, vol. 24, no. 20, pp. 4764-4780
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [ONLINE]

  • Application of variational iteration method to free vibration analysis of a tapered beam mounted on two-degree of freedom subsystems

    Elsayed, T., El-Mongy, H.
    Applied Mathematical Modelling, vol. 58, pp. 349-364
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [ONLINE]

  • A Normalized Transfer Matrix Method for the Free Vibration of Stepped Beams: Comparison with Experimental and FE(3D) Methods

    El-Sayed, T. A., Farghaly, S. H.
    Shock and Vibration, vol. 2017, 8186976
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [ONLINE]

  • Failure pressure of composite membrane housing for SWRO desalination plants

    Kamal, A. M., El-Sayed, T. A., Farghaly, S. H., El-Butch, A. M.
    Desalination, vol. 411, pp. 45-58
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [ONLINE]

  • Exact free vibration analysis for mechanical system composed of Timoshenko beams with intermediate eccentric rigid body on elastic supports: An experimental and analytical investigation

    Farghaly, S. H., El-Sayed, T. A.
    Mechanical Systems and Signal Processing, vol. 82, pp. 376-393
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [ONLINE]

  • Analytical and finite element modeling of pressure vessels for seawater reverse osmosis desalination plants

    Kamal, A. M., El-Sayed, T. A., El-Butch, A. M. A., Farghaly, S. H.
    Desalination, vol. 397, pp. 126-139
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [ONLINE]

  • Exact free vibration analysis of Timoshenko stepped shaft carrying elastically supported eccentric masses with application on SWRO mechanical system

    El-Sayed, T. A., Farghaly, S. H.
    Desalination, vol. 385, pp. 194-206
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [ONLINE]

  • Exact free vibration of multi-step Timoshenko beam system with several attachments

    Farghaly, S. H., El-Sayed, T. A.
    Mechanical Systems and Signal Processing, vol. 72-73, pp. 525-546
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [ONLINE]

  • Exact vibration of Timoshenko beam combined with multiple mass spring sub-systems

    El-Sayed, T. A., Farghaly, S. H.
    Structural Engineering and Mechanics, vol. 57, no. 6, pp. 989-1014
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [ONLINE]

  • Performance of hydraulic turbocharger integrated with hydraulic energy management in SWRO desalination plants

    El-Sayed, T. A., Abdel Fatah, A. A.
    Desalination, vol. 379, pp. 85-92
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [ONLINE]

  • A Finite-Element Hardness Model for Analyzing 316L Stainless Steel/Ceramic Nanocomposites

    El-Sayed, T., Imbaby, M., Jiang, K.
    Mechanics of Composite Materials, vol. 51, pp. 33-42
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [ONLINE]

  • Fractographic analysis of epoxy coated glass

    El-Sayed, T., Hand, R. J.
    Ceramics International, vol. 38, no. 3, pp. 2543-2549
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [ONLINE]

  • Modelling the strengthening of glass using epoxy based coatings

    El-Sayed, T., Hand, R. J.
    Journal of the European Ceramic Society, vol. 31, no. 15, pp. 2783-2791
    Contributions to Journals: Articles
    • [ONLINE] DOI:
    • [ONLINE]

  • An investigation into the fatigue behaviour of polymeric materials

    El-Sayed, T. A., Naga, S. A.
    Contributions to Conferences: Papers
    • [ONLINE]
    • [ONLINE]

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