Vasileios Fragkoulis, Ph. D.

Vasileios Fragkoulis, Ph. D.
Address
Callinstraße 34
30167 Hannover
Building
Room
119
Vasileios Fragkoulis, Ph. D.
Address
Callinstraße 34
30167 Hannover
Building
Room
119

RESEARCH

  • applied and computational mathematics
  • uncertainty quantification methodologies
  • stochastic and fractional calculi
  • wavelet theory modeling and analyses
  • stochastic dynamics and nonlinear systems

BIOGRAPHY

Dr. Vasileios Fragkoulis is a Research Associate and a member of the Institute for Risk and Reliability at Leibniz University Hannover. He earned his Ph.D. from the Department of Mathematical Sciences at the University of Liverpool. He also holds a M.Sc. degree and a 5-year Diploma from the School of Applied Mathematical and Physical Sciences at the National Technical University of Athens, both in the area of Applied Mathematical Sciences. Dr. Fragkoulis’ research interests focus on the general area of Applied Mathematics, and Uncertainty Quantification and Analysis of systems with diverse applications in Civil/Mechanical Engineering and Engineering Mechanics. Analyzing and assessing the reliability of complex engineering systems and structures under the presence of uncertainties constitutes his main research theme. Dr. Fragkoulis has successfully acquired research funding from the German Research Foundation (DFG). He is leading as the Principal Investigator a research proposal awarded under a scheme which recognizes early stage scholars with high levels of promise and excellence. He supervises and co-supervises two Ph.D. students, and he teaches the class ‘Advanced stochastic analysis’ at the Postgraduate course ‘Computational methods in engineering’.

COURSES

JOURNAL ARTICLE

  • Fragkoulis, V.C.; Kougioumtzoglou, I.A.; Pantelous, A.A.; Beer, M. (2022): Joint statistics of natural frequencies corresponding to structural systems with singular random parameter matricesASCE Journal of Engineering Mechanics, 148(3). Article 04022001.
  • Ni, P.H.; Jerez, D.J.; Fragkoulis, V.C.; Faes, M.G.R.; Valdebenito, M.A.; Beer, M. (2022): Operator Norm-based Statistical Linearization to Bound the First Excursion Probability of Nonlinear Structures Subjected to Imprecise Stochastic LoadingASCE-ASME Journal of Risk and Uncertainty in Engineering Systems, Part A: Civil Engineering, 8(1), Article 04021086.
  • Pasparakis, G.D.; Kougioumtzoglou, I.A.; Fragkoulis, V.C.; Kong, F.; Beer, M. (2022): Excitation-response relationships for linear structural systems with singular parameter matrices: A periodized harmonic wavelet perspectiveMechanical Systems and Signal Processing, 169, Article 108701.
  • Karageorgos, A. D., Moysis, L., Fragkoulis, V. C., Kougioumtzoglou, I. A., and Pantelous, A. A. (2021): Random vibration of linear systems with singular matrices based on Kronecker canonical forms of matrix pencilsMechanical Systems and Signal Processing, 161, 107896.
  • Ni, P.H.; Fragkoulis, V.C.; Kong, F.; Mitseas, I.P.; Beer, M. (2021): Response determination of nonlinear systems with singular matrices subject to combined stochastic and deterministic excitationsASCE-ASME Journal of Risk and Uncertainty in Engineering Systems, Part A: Civil Engineering, 7(4), Article 04021049.
  • Pirrotta, A., Kougioumtzoglou, I. A., Di Matteo, A., Fragkoulis, V. C., Pantelous, A. A., and Adam, C. (2021): Deterministic and random vibration of linear systems with singular parameter matrices and fractional derivative termsJournal of engineering mechanics, DOI: 10.1061/(ASCE)EM.1943-7889.0001937.
  • Pasparakis, G.; Fragkoulis, V.; Beer, M. (2020): Harmonic wavelets based response evolutionary power spectrum determination of linear and nonlinear structural systems with singular matricesMechanical Systems and Signal Processing, 149, Article 107203. | File |
    DOI: 10.1016/j.ymssp.2020.107203
  • Fragkoulis, V.C.; Kougioumtzoglou, I.A.; Pantelous, A.A.; Beer, M. (2019): Non-stationary response statistics of nonlinear oscillators with fractional derivative elements under evolutionary stochastic excitationNonlinear Dynamics, 7, 1–13, doi 10.1007/s11071-019-05124-0.
  • Kougioumtzoglou, I.A., Fragkoulis, V.C., Pantelous, A.A., Pirrotta, A. (2017): Random vibration of linear and nonlinear structural systems with singular matrices: A frequency domain approachJournal of Sound and Vibration, 404:84-101.
    DOI: 10.1016/j.jsv.2017.05.038
  • Fragkoulis, V.C., Kougioumtzoglou, I.A., Pantelous, A.A. (2016): Statistical linearization of nonlinear structural systems with singular matricesASCE Journal of Engineering Mechanics, 142(9):04016063-11.
    DOI: 10.1061/(ASCE)EM.1943-7889.0001119
  • Fragkoulis, V.C., Kougioumtzoglou, I.A., Pantelous, A.A. (2015): Linear random vibration of structural systems with singular matricesASCE Journal of Engineering Mechanics, 142(2):04015081-11.
    DOI: 10.1061/(ASCE)EM.1943-7889.0001000

RESEARCH PROJECTS