Faculty Members

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Prof.Tamer Ahmed Elsayed Elsayed

Professor College of Engineering

Kharj
011-588-8207
t.elsayed@psau.edu.sa

Curriculum Vitae
Publications

Education

PhD. in Engineering . Sheffield University, UK. 2010
M.Sc. in Mechanical Design. Helwan University, 2006
Bsc.in Mechanical Engineering. Helwan University, 2000.

Research Interests

Dr. Tamer El-Sayed’s research focuses on the nonlinear dynamics and stability of mechanical and structural systems, with particular emphasis on rotating machinery, functionally graded materials (FGMs), and vibration analysis. His work integrates advanced analytical, numerical, and computational methods to investigate dynamic stability, periodic motion, and bifurcation phenomena in complex mechanical systems such as rotors, beams, and fluid-conveying structures. In addition, he is deeply involved in computational fluid dynamics (CFD) modeling and simulation of pumps, compressors, and turbochargers to optimize their performance, efficiency, and flow characteristics. His research extends to the application of Floquet theory, state transition matrices, and continuation methods for the analysis of nonlinear periodic systems, as well as the modeling of smart and composite materials, crack detection and healing in structures, and fault diagnosis in rotating machinery

Experience

2025 - until now - Full Professor - Price Sattam bin abd elaziz university
2021 - 2025 - Full Professor - Helwan University
2021 - 2025 - Adjuct professor - Hertfordshire University
2020 - 2025 - Honorary research fellow - University of Aberdeen
2016 - 2020 - Associate Professor - Helwan University
2011 - 2016 - Assistant Professor - Helwan University

Responsibilities

Member of the Scientific Research Committee at both the Department and Faculty levels
Teaching undergraduate courses in the Department of Mechanical Engineering, Faculty of Engineering
Teaching postgraduate (graduate) courses in the Department of Mechanical Engineering, Faculty of Engineering
Supervision of Senior Graduation Projects in the department
Member of the Mechanical Engineering Department Council

Publications

2026
El-Mongy, H., T.A. El-Sayed, V. Vaziri and M. Wiercigroch, 2026. Semi-analytical model for rub dynamics to investigate whirling. JVC/Journal of Vibration and Control. DOI: 10.1177/10775463261429076.
El-Sayed, T.A., M.S. Taima, F.E. Shoukry and M.M.Z. Ahmed, 2026. Advances in the dynamics of pipes conveying fluids: A review. Vibration, 9(2). DOI: 10.3390/vibration9020040.
Ragab, M., M.M.Z. Ahmed, M.M. El-Sayed Seleman, S. Ataya, A. Alamry and T.A. El-Sayed, 2026. Friction stir welding: A critical review of analytical, numerical, and experimental methods for quantifying heat generation. Machines, 14(4). DOI: 10.3390/machines14040440.
Sayed, H., T.A. El-Sayed and M.I. Friswell, 2026. Nonlinear dynamics of reverse osmosis high pressure high speed centrifugal pumps. Scientific Reports, 16(1). DOI: 10.1038/s41598-026-38772-5.
Taima, M., T. El-Sayed, M. Ramadan and M. Friswell, 2026. Reducing computational time in Floquet theory for the stability of rotating tapered 2D-FGM beams using Bolotin's first-order method. Engineering Computations (Swansea, Wales), pp. 1-25. DOI: 10.1108/EC-12-2025-1500.
2025
Elsayed, E.K., T.A. El-Sayed and H. Sayed, 2025. Coupled journal and thrust bearing dynamics considering five degree of freedom model and using second-order bearing coefficients. Physics of Fluids, 37(10). DOI: 10.1063/5.0287890.
Farghaly, S.H. and T.A. El-Sayed, 2025. A novel method for deriving high-order frequency equations with applications to cantilever beam vibrations. Journal of Vibration Engineering and Technologies, 13(2). DOI: 10.1007/s42417-024-01586-8.
Taima, M.S., T.A. El-Sayed and M.I. Friswell, 2025. Dynamic stability analysis of tapered rotating beams with 2D functionally graded materials: A comparative study of Floquet theory approaches. Thin-Walled Structures, 213. DOI: 10.1016/j.tws.2025.113257.
2024
Ahmed, O., T.A. El-Sayed and H. Sayed, 2024. A comparative study of theoretical and experimental analysis on balanced and unbalanced rotors supported by oil-and water-lubricated journal bearings. Machines, 12(10): 675.
Ahmed, O., T.A. El-Sayed and H. Sayed, 2024. Finite element analyses of rotor/bearing system using second-order journal bearings stiffness and damping coefficients. JVC/Journal of Vibration and Control, 30(17-18): 3961-3984.
El-Mongy, H.H., T.A. El-Sayed, V. Vaziri and M. Wiercigroch, 2024. Nonlinear dynamics of whirling rotor with asymmetrically supported snubber ring. Machines, 12(12). DOI: 10.3390/machines12120897.
Elsayed, E.K., H. Sayed and T.A. El-Sayed, 2024. Analysis of second-order thrust bearing coefficients considering misalignment effect. Journal of Vibration Engineering and Technologies, 12(2): 1957-1977.
Elsayed, E.K., H. Sayed and T.A. El-Sayed, 2024. Effect of groove depth on herringbone thrust bearing dynamic coefficients. Advances in Transdisciplinary Engineering, 58: 87-92.
Kandil, M., T.A. El-Sayed and A.M. Kamal, 2024. Unveiling the impact of pipe materials on water hammer in pressure pipelines: an experimental and numerical study. Scientific Reports, 14(1). DOI: 10.1038/s41598-024-80853-w.
Naga, S.A.R. and T.A. El-Sayed, 2024. Fatigue failure in polymeric materials: Insights from experimental testing. Journal of Failure Analysis and Prevention, 24(2): 922-935.
Sayed, H., T.A. El-Sayed, M.I. Friswell and H.H. El-Mongy, 2024. Nonlinear dynamics analysis of hydraulic turbochargers in reverse osmosis desalination plants. Nonlinear Dynamics, 112(21): 18817-18846.
Zaghlol, M.G., H. Sayed and T.A. El-Sayed, 2024. Frequency ratio effects on dynamic behavior of rotor-bearing system. Advances in Transdisciplinary Engineering, 58: 2-7.
2023
El-Sayed, T.A., M.I. Friswell and H. Sayed, 2023. Approximating fluid bearing characteristics using polynomials for the nonlinear dynamics of rotating machines. Tribology International, 187. DOI: 10.1016/j.triboint.2023.108669.
Eldeeb, A.M., Y.M. Shabana, T.A. El-Sayed and A. Elsawaf, 2023. A nontraditional method for reducing thermoelastic stresses of variable thickness rotating discs. Scientific Reports, 13(1). DOI: 10.1038/s41598-023-39878-w.
Eldeeb, A.M., Y.M. Shabana, T.A. El-Sayed, L. Guo and A. Elsawaf, 2023. Thermoelastic stresses alleviation for two-dimensional functionally graded cylinders under asymmetric loading. Journal of Thermal Stresses, 46(1): 59-74.
El-Mongy, H., T. El-Sayed, V. Vaziri and M. Wiercigroch, 2023. Piecewise analytical solution for rub interactions between a rotor and an asymmetrically supported stator. Mechanisms and Machine Science, 125 MMS: 532-539.
Sayed, H., T.A. El-Sayed and M.I. Friswell, 2023. Continuation analysis of rotor bearing systems through direct solution of Reynolds equation. Advances in Transdisciplinary Engineering, 40: 217-222.
Shehab, M.B., M.S. Taima, H. Sayed and T.A. El-Sayed, 2023. An investigation into the free vibration of intact and cracked FGM plates. Journal of Failure Analysis and Prevention, 23(5): 2142-2168.
Taima, M.S., T.A. El-Sayed and M.I. Friswell, 2023. Dynamic analysis of double-tapered rotating beams composed of bidirectional functionally graded materials (BFGMs). Advances in Transdisciplinary Engineering, 40: 424-429.
Taima, M.S., M.B. Shehab, T.A. El-Sayed and M.I. Friswell, 2023. Comparative study on free vibration analysis of rotating bi-directional functionally graded beams using multiple beam theories with uncertainty considerations. Scientific Reports, 13(1). DOI: 10.1038/s41598-023-44411-0.
Taima, M.S., T.A. El-Sayed and M.I. Friswell, 2023. Thermal vibration analysis of cracked nanobeams submerged in elastic foundations by nonlocal continuum mechanics. Thin-Walled Structures, 193. DOI: 10.1016/j.tws.2023.111249.
Taima, M.S., T.A. El-Sayed, M.B. Shehab, S.H. Farghaly and R.J. Hand, 2023. Vibration analysis of cracked beam based on Reddy beam theory by finite element method. JVC/Journal of Vibration and Control, 29(19-20): 4589-4606.
2022
El-Sayed, T.A. and H. Sayed, 2022. Bifurcation analysis of rotor/bearing system using third-order journal bearing stiffness and damping coefficients. Nonlinear Dynamics, 107(1): 123-151.
El-Sayed, T.A. and H.H. El-Mongy, 2022. A new numeric–symbolic procedure for variational iteration method with application to the free vibration of generalized multi-span Timoshenko beam. JVC/Journal of Vibration and Control, 28(7-8): 799-811.
Sayed, H. and T.A. El-Sayed, 2022. Nonlinear dynamics and bifurcation analysis of journal bearings based on second order stiffness and damping coefficients. International Journal of Non-Linear Mechanics, 142. DOI: 10.1016/j.ijnonlinmec.2022.103972.
Sayed, H. and T.A. El-Sayed, 2022. A novel method to evaluate the journal bearing forces with application to flexible rotor model. Tribology International, 173. DOI: 10.1016/j.triboint.2022.107593.
Taima, M.S., T. El-Sayed and S.H. Farghaly, 2022. Longitudinal vibration analysis of a stepped nonlocal rod embedded in several elastic media. Journal of Vibration Engineering and Technologies, 10(4): 1399-1412.
2021
Hassanin, H., K. Essa, A. Elshaer, M. Imbaby, H.H. El-Mongy and T.A. El-Sayed, 2021. Micro-fabrication of ceramics: Additive manufacturing and conventional technologies. Journal of Advanced Ceramics, 10(1). DOI: 10.1007/s40145-020-0422-5.
Taima, M.S., T.A. El-Sayed and S.H. Farghaly, 2021. Free vibration analysis of multistepped nonlocal Bernoulli–Euler beams using dynamic stiffness matrix method. JVC/Journal of Vibration and Control, 27(7-8): 774-789.
2020
El-Sayed, T.A. and S.H. Farghaly, 2020. Formulae for the frequency equations of beam-column system carrying a fluid storage tank. Structural Engineering and Mechanics, 73(1): 83-95.
Kandil, M., A.M. Kamal and T.A. El-Sayed, 2020. Effect of pipe materials on water hammer. International Journal of Pressure Vessels and Piping, 179. DOI: 10.1016/j.ijpvp.2019.103996.
Ahmed, E., E. Tamer and F. Said, 2020. Optimal design for maximum fundamental frequency and minimum intermediate support stiffness for uniform and stepped beams composed of different materials. SAE Technical Papers, 2020-January(January). DOI: 10.4271/2020-01-5014.
2019
El-Sayed, T.A. and H.H. El-Mongy, 2019. Free vibration and stability analysis of a multi-span pipe conveying fluid using exact and variational iteration methods combined with transfer matrix method. Applied Mathematical Modelling, 71: 173-193.
El-Sayed, T.A. and A.A. Abdel Fatah, 2019. Investigating the performance of reciprocating high-pressure pumps in constant recovery small RO desalination plants. Desalination and Water Treatment, 143: 78-87.
Elshazly, E., N. Eltayeb, A.A. Abdel Fatah and T.A. El-Sayed, 2019. Experimental and computational investigation of energy ball wind turbine aerodynamic performance. Advances in Mechanical Engineering, 11(10). DOI: 10.1177/1687814019879546.
2018
El-Sayed, T.A. and H.H. El-Mongy, 2018. Application of variational iteration method to free vibration analysis of a tapered beam mounted on two-degree of freedom subsystems. Applied Mathematical Modelling, 58: 349-364.
El-Sayed, T.A. and S.H. Farghaly, 2018. Frequency equation using new set of fundamental solutions with application on the free vibration of Timoshenko beams with intermediate rigid or elastic span. JVC/Journal of Vibration and Control, 24(20): 4764-4780.
2017
El-Sayed, T.A. and S.H. Farghaly, 2017. A normalized transfer matrix method for the free vibration of stepped beams: Comparison with experimental and FE(3D) methods. Shock and Vibration, 2017. DOI: 10.1155/2017/8186976.
Farghaly, S.H. and T.A. El-Sayed, 2017. Exact free vibration analysis for mechanical system composed of Timoshenko beams with intermediate eccentric rigid body on elastic supports: An experimental and analytical investigation. Mechanical Systems and Signal Processing, 82: 376-393.
Kamal, A.M., T.A. El-Sayed, S.H. Farghaly and A.M.A. El-Butch, 2017. Failure pressure of composite membrane housing for SWRO desalination plants. Desalination, 411: 45-58.
2016
El-Sayed, T.A. and A.A. Abdel Fatah, 2016. Performance of hydraulic turbocharger integrated with hydraulic energy management in SWRO desalination plants. Desalination, 379: 85-92.
El-Sayed, T.A. and S.H. Farghaly, 2016. Exact free vibration analysis of Timoshenko stepped shaft carrying elastically supported eccentric masses with application on SWRO mechanical system. Desalination, 385: 194-206.
El-Sayed, T.A. and S.H. Farghaly, 2016. Exact vibration of Timoshenko beam combined with multiple mass spring sub-systems. Structural Engineering and Mechanics, 57(6): 989-1014.
Farghaly, S.H. and T.A. El-Sayed, 2016. Exact free vibration of multi-step Timoshenko beam system with several attachments. Mechanical Systems and Signal Processing, 72-73: 525-546.
Kamal, A.M., T.A. El-Sayed, A.M.A. El-Butch and S.H. Farghaly, 2016. Analytical and finite element modeling of pressure vessels for seawater reverse osmosis desalination plants. Desalination, 397: 126-139.
2015
El-Sayed, T., M. Imbaby and K. Jiang, 2015. A finite-element hardness model for analyzing 316L stainless steel/ceramic nanocomposites. Mechanics of Composite Materials, 51(1): 33-42.
2012
El-Sayed, T. and R.J. Hand, 2012. Fractographic analysis of epoxy coated glass. Ceramics International, 38(3): 2543-2549.
2011
El-Sayed, T. and R.J. Hand, 2011. Modelling the strengthening of glass using epoxy based coatings. Journal of the European Ceramic Society, 31(15): 2783-2791.
2005
El-Sayed, T.A. and S.A. Naga, 2005. An investigation into the fatigue behaviour of polymeric materials. International SAMPE Technical Conference, 2005.

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Prof.Tamer Ahmed Elsayed Elsayed

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Publications

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Faculty Members

Prof.Tamer Ahmed Elsayed Elsayed

Education

Research Interests

Experience

Responsibilities

Publications

Administration of Public Relations and Media