Faculty Members

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

Publications

1. M.S. Taima, T.A. El-Sayed, M.I. Friswell, Dynamic Stability Analysis of Tapered Rotating Beams with 2D Functionally Graded Materials: A Comparative Study of Floquet Theory Approaches, Thin-Walled Structures, March 2025, Accepted.
2. Ahmed, O., T. El-Sayed and H. Sayed, 2024. Finite element analyses of rotor/bearing system using second-order journal bearings stiffness and damping coefficients. Journal of Vibration and Control, 30(17-18): 3961-3984.
3. 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.
4. 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.
5. Elsayed, E.K., H. Sayed, EL-SAYED and T. A., 2024. Effect of groove depth on herringbone thrust bearing dynamic coefficients. In: The 10th International Conference on Advances in Machinery, Material Science and Engineering Application (MMSE 2024).
6. Farghaly, S. and T. Elsayed, 2025. A novel method for deriving high-order frequency equations with applications to cantilever beam vibrations. Journal of Vibration EngineeringTechnologies.
7. Kandil, M., T.A. El-Sayed and A. Kamal, 2024. Unveiling the impact of pipe materials on water hammer in pressure pipelines: An experimental and numerical study. Scientific Reports, 14(1): 30599.
8. Kandil, M., T.A. El-Sayed and A.M. Kamal, 2024. Comparative analysis of water hammer performance in different pipe parameters with fsi. Journal of Experimental and Theoretical Analyses, 2(3): 58-79.
9. 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.
10. ZAGHLOL, M.G., H. SAYED, EL-SAYED and T. A., 2024. Frequency ratio effects on dynamic behavior of rotor-bearing system. In: The 10th International Conference on Advances in Machinery, Material Science and Engineering Application (MMSE 2024).
11. Naga, S. A., & El-Sayed, T. A. (2024). Fatigue Failure in Polymeric Materials: Insights from Experimental Testing. Journal of Failure Analysis and Prevention, 1-14.
12. M.S. Taima, M.B. Shehab, T.A. El-Sayed, M.I. Friswell, Comparative study on free vibration analysis of rotating bi-directional functionally graded beams using multiple beam theories with uncertainty considerations, Scientific Reports, 13 (2023) 17917. https://doi.org/10.1038/s41598-023-44411-0
13. Ahmed O, El-Sayed T, Sayed H. Finite element analyses of rotor/bearing system using second-order journal bearings stiffness and damping coefficients. Journal of Vibration and Control. 2023;0(0). https://doi:10.1177/10775463231204388
14. M.S. Taima, T.A. El-Sayed, M.I. Friswell, Thermal vibration analysis of cracked nanobeams submerged in elastic foundations by nonlocal continuum mechanics, Thin-Walled Structures, (2023) 111249. https://doi.org/10.1016/j.tws.2023.111249
15. M.B. Shehab, M.S. Taima, H. Sayed, T.A. El-Sayed, An Investigation into the Free Vibration of Intact and Cracked FGM Plates, Journal of Failure Analysis and Prevention, 23 (2023) 2142-2168.https://doi.org/10.1007/s11668-023-01744-2
16. Eldeeb, A.M., Shabana, Y.M., El-Sayed, T.A. et al. A nontraditional method for reducing thermoelastic stresses of variable thickness rotating discs. , Scientific Reports 13, 13578 (2023). https://doi.org/10.1038/s41598-023-39878-w
17. T.A. El-Sayed, Michael I. Friswell, Hussein Sayed, Approximating fluid bearing characteristics using polynomials for the nonlinear dynamics of rotating machines,Tribology International,(2023)187,108669.
https://doi.org/10.1016/j.triboint.2023.108669
18. Elsayed K. Elsayed, Hussein Sayed, T.A. El-Sayed, Analysis of Second Order Thrust Bearing Coefficients Considering Misalignment Effect, Journal of vibration Engineering and technology ,(2023) .https://link.springer.com/article/10.1007/s42417-023-00956-y
19. A. M. Eldeeb, Y. M. Shabana, T. A. El-Sayed, Licheng Guo & A. Elsawaf , Thermoelastic stresses alleviation for two-dimensional functionally graded cylinders under asymmetric loading, Journal of Thermal Stresses, (2023) 46:1, 59-74, https://doi.org/10.1080/01495739.2022.2151960.
20. Taima MS, El-Sayed TA, Shehab MB, Farghaly SH, Hand RJ. Vibration analysis of cracked beam based on Reddy beam theory by finite element method. Journal of Vibration and Control. 2022;0(0). https://doi.org/10.1177/10775463221122122
21. H. Sayed, T.A. El-Sayed, A novel method to evaluate the journal bearing forces with application to flexible rotor model, Tribology International, 173 (2022) 107593. https://www.sciencedirect.com/science/article/pii/S0301679X22001669
22. M. S. Taima, T. Elsayed and S. H. Farghaly “Longitudinal vibration analysis of a stepped nonlocal rod embedded in several elastic media” Journal of Vibration Engineering & Technologies 10(2022),1399-1412 .
https://link.springer.com/article/10.1007/s42417-022-00454-7
23. Elsayed, T., El-Mongy, H., Vaziri, V. & Wiercigroch, M.,"Analytical study of rotor-stator rubbing phenomenon" ,COBEM 2021, 2 Nov 2021 → 26 Nov 2021.
10.26678/ABCM.COBEM2021.COB2021-1624
24. T. A. Elsayed, H Sayed" Nonlinear dynamics and bifurcation analysis of journal bearings based on second order stiffness and damping coefficients" , International Journal of Non-Linear Mechanics, 142(2022). https://www.sciencedirect.com/science/article/abs/pii/S0020746222000439
25. T. A. Elsayed, H Sayed" Bifurcation Analysis of Rotor/Bearing System using Third Order Journal Bearings Stiffness and Damping Coefficients”, Nonlinear Dynamics, 107(2022)123-151.https://link.springer.com/article/10.1007/s11071-021-06965-4
26. Youssef, T., Y. Elsayed, T. A. Elsayed and S. M. Lawaty. "Investigation of foamcrete mechanical and physical properties " International Conference on Aerospace Sciences and Aviation Technology. 19 (2021): 1-11. https://asat.journals.ekb.eg/article_198207.html
27. El-Sayed, T. A. and H. H. El-Mongy. "A new numeric-symbolic procedure for variational iteration method with application to the free vibration of generalized multi-span Timoshenko beam." Journal of Vibration and Control: 28(2022)1-13. https://journals.sagepub.com/doi/10.1177/1077546320983192
28. H. Hassanin, K. Essa, A. Elshaer, M. Imbaby, H.H. El-Mongy, T.A. El-Sayed, Micro-Fabrication of Ceramics: Additive Manufacturing and Conventional Technologies, Journal of Advanced Ceramics, 10 (2021),1-27. https://link.springer.com/article/10.1007/s40145-020-0422-5
29. M.S. Taima, T.A. El-Sayed, S.H. Farghaly, Free vibration analysis of multi-stepped nonlocal Bernoulli-Euler beams using dynamic stiffness matrix (DSM) method, Journal of Vibration and Control, 27 (2020)774-789.https://journals.sagepub.com/doi/10.1177/1077546320933470
30. A. Elsawaf, T.A. Elsayed, S.H. Farghaly, Optimal Design for Maximum Fundamental Frequency and Minimum Intermediate Support Stiffness for Uniform and Stepped Beams Composed of Different Materials, SAE International, 2020. https://www.sae.org/publications/technical-papers/content/2020-01-5014/
31. Elsayed, T. A. and S.H.Farghaly. "Formulae for the Frequency Equations of Beam-Column System Carrying a Fluid Storage Tank.", Structural Engineering and Mechanics, (2020),73:83-95. https://doi.org/10.12989/sem.2020.73.1.083
32. Kandil, M, Kamal, AM & El-Sayed, TA, 'Effect of pipe materials on water hammer', International Journal of Pressure Vessels and Piping, vol. 179)2020), 103996.
https://doi.org/10.1016/j.ijpvp.2019.103996.
33. E. Elshazly, N. Eltayeb, A.A. Abdel Fatah, T.A. El-Sayed, Experimental and computational investigation of energy ball wind turbine aerodynamic performance, Advances in Mechanical Engineering, 11 (2019) 1687814019879546. https://journals.sagepub.com/doi/10.1177/1687814019879546
34. T. A. El-Sayed and H.H. El-Mongy ‘'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 (2019); 71: 173-193. https://www.sciencedirect.com/science/article/abs/pii/S0307904X19300836
35. El-Sayed, T. A., Abdel Fatah A. "Investigating the performance of reciprocating high-pressure pumps in constant recovery small RO desalination plants.", Desalination and Water Treatment 143(2019): 78-87. 10.5004/dwt.2019.23550
36. T. A. El-Sayed, and H.H. El-Mongy, “Application of variational iteration method to free vibration analysis of a tapered beam mounted on two-degree of freedom subsystems”, Journal of Applied Mathematical Modelling. 58 (2018): 349-364. https://www.sciencedirect.com/science/article/pii/S0307904X18300751
37. M.Z. Salim, T.A. El-Sayed, E.M. Rabeih, S.H. Farghaly, Free vibration analysis for a pipe conveying fluid with intermediate support and carrying multiple concentrated masses, Engineering Research Journal, 160 (2018) 26-43. https://erj.journals.ekb.eg/article_139535_f7e62e06412316250b794c2f7b037f9e.pdf
38. T.A. El-Sayed, S.H. Farghaly, A Normalized Transfer Matrix Method for the Free Vibration of Stepped Beams: Comparison with Experimental and FE(3D) Methods, Shock and Vibration, 2017 (2017) 8186976. https://www.hindawi.com/journals/sv/2017/8186976/
39. T. A. El-Sayed, and S. H. Farghaly, Frequency equation using new set of fundamental solutions with application on the free vibration of Timoshenko beams with intermediate rigid or elastic span, Journal of Vibration and Control. 24 (2018) 4764-4780. https://journals.sagepub.com/doi/abs/10.1177/1077546317734102?journalCode=jvcb
40. A. H. Matter, T. A. El-Sayed and A.M.A.El-Butch. “An investigation into the performance of the hydraulic turbocharger” Engineering research Journal, (2017).
41. Kamal, A. M., et al. "Failure pressure of composite membrane housing for SWRO desalination plants.", Desalination 411 (2017): 45-58. https://www.sciencedirect.com/science/article/abs/pii/S0011916416311018
42. Farghaly, S. H., and T. A. El-Sayed. "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 (2017): 376-393. https://www.sciencedirect.com/science/article/abs/pii/S0888327016301145
43. Kamal, A. M., et al. "Analytical and finite element modeling of pressure vessels for seawater reverse osmosis desalination plants.", Desalination 397 (2016): 126-139. https://www.sciencedirect.com/science/article/abs/pii/S0011916416306361
44. E.S.M.M. Soliman, T.A. Elsayed, S.A.R. Naga, A New Approach to Design a Composite Material for Light Mono Leaf Spring Using FEA, Vestnik IZTU, 1(69). (2016): 8 - 13. http://izdat.istu.ru/index.php/vestnik/article/view/3156
45. T. A. El-Sayed, and S. H. Farghaly, Exact free vibration analysis of Timoshenko stepped shaft carrying elastically supported eccentric masses with application on SWRO mechanical system, Desalination. 385(2016):194-206. https://www.sciencedirect.com/science/article/abs/pii/S0011916416300480
46. T. A. El-Sayed, and S. H. Farghaly, Exact vibration of Timoshenko beam combined with multiple mass spring sub-system, Structural Engineering and Mechanics, An International Journal. 57(2016)989-1014. https://doi.org/10.12989/sem.2016.57.6.989
47. S. H. Farghaly, and T. A. El-Sayed, Exact Free Vibration of Multi-Step Timoshenko Beam System with Several Attachments, Mechanical Systems and Signal Processing. 72-73C (2016), 525-546. https://www.sciencedirect.com/science/article/abs/pii/S0888327015005427
48. A. El-Sayed; A. Abdel Fatah, Performance of Hydraulic Turbocharger Integrated with Hydraulic Energy Management in SWRO Desalination Plants, Desalination, 379 (2016), 85–92. https://www.sciencedirect.com/science/article/abs/pii/S0011916415301028
49. T. A. El-Sayed, M. Imbaby, K. Jiang, A Finite-Element Hardness Model for Analyzing 316L Stainless Steel/Ceramic Nanocomposites, Mechanics of Composite Materials, 51 (2015) 33-42. https://link.springer.com/article/10.1007/s11029-015-9474-y
50. A.A.Srag, A. M. A. El-Butch, T. A. El-Sayed; Buckling of thin walled long steel pipes subjected to external pressure in process industries, International journal of innovative science, Engineering &Technology,2(2015) 434-444. https://ijiset.com/vol2/v2s12/IJISET_V2_I12_50.pdf
51. S.A.R. Naga, T.A. Elsayed, E.S.M.M. Soliman, An approach to design a composite mono leaf spring using FEA, Vestnik IZTU, 2 (2014) 28-32
http://izdat.istu.ru/index.php/vestnik/article/view/2894
52. T. A. El-Sayed. and R. J. Hand, Fractographic analysis of epoxy coated glass, Ceramics International, 38(3), (2012), 2543-2549. https://www.sciencedirect.com/science/article/pii/S0272884211009849
53. T. A. El-Sayed. and R. J. Hand, Modelling the strengthening of glass using epoxy based coatings, Journal of the European Ceramic Society 31(15), (2011), 2783-2791. https://www.sciencedirect.com/science/article/abs/pii/S0955221911002780
54. H. Hassanin , M. Imbaby , H. H. El-Mongy , T. A. El-Sayed ,Manufacturing Processes for Ceramic and Metal Micro-components, Encyclopedia of nanoscience and nanotechnology, (Accepted). https://eprints.kingston.ac.uk/id/eprint/34902/

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Prof.Tamer Ahmed Elsayed Elsayed

Education

Research Interests

Experience

Publications

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Official government website of the Government of the Kingdom of Saudi Arabia

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Government websites use the HTTPS protocol for encryption and security.

Faculty Members

Prof.Tamer Ahmed Elsayed Elsayed

Education

Research Interests

Experience

Publications

Administration of Public Relations and Media