Stanislav Stoykov, PhD

Associate Professor, Institute of Information and Communication Technologies, Bulgarian Academy of Sciences

• Date of Birth: 29 July 1982
• Nationality: Bulgarian

Address

Acad. G. Bonchev Str., bl. 25A
1113 Sofia, Bulgaria
Email: stoykov@parallel.bas.bg
Phone: +359 2 979 63 23

Education

• March 2008 - March 2012 - PhD in Mechanical Engineering at Faculty of Engineering, University of Porto, Portugal
PhD thesis Nonlinear Vibrations of 3D Beams
• September 2011 - December 2011 - Guest Researcher, TU Delft, The Netherlands
• 2005 - 2007 - MSc in Applied Mathematics, Faculty of Mathematics and Informatics, Sofia University
• 2005 - 2006 - Erasmus Program, Faculty of Engineering, University of Porto, Portugal
• 2001 - 2005 - BSc in Computer Science, Faculty of Mathematics and Informatics, Sofia University
• 1996 - 2001 - Sofia High School of Mathematics, Sofia

Research Interest

• Nonlinear dynamics
• Bifurcation theory
• Finite element method
• Models of beams, plates and shells
• Modal interactions, stability, chaotic motions
• Iterative methods for large-scale systems

Foreign languages

• English
• Portuguese

List of Publications

Journal Papers

1. S. Stoykov, E. Manoach, Damage localization of beams based on measured forced responses, Mechanical Systems and Signal Processing 151 (2021) 107379.
2. S. Stoykov, Buckling analysis of geometrically nonlinear curved beams, Journal of Computational and Applied Mathematics 340 (2018) 653-663.
3. S. Stoykov, S. Margenov, Numerical methods and parallel algorithms for computation of periodic responses of plates, Journal of Computational and Applied Mathematics 310 (2017) 200-212.
4. S. Stoykov, E. Manoach, S. Margenov, An efficient 3D numerical beam model based on cross sectional analysis and Ritz approximations, ZAMM - Journal of Applied Mathematics and Mechanics 96 (2016) 791-812.
5. S. Stoykov, S. Margenov, Scalable parallel implementation of shooting method for large-scale dynamical systems. Application to bridge components, Journal of Computational and Applied Mathematics 293 (2016) 223-231.
6. S. Stoykov, G. Litak, E. Manoach, Vibration energy harvesting by a Timoshenko beam model and piezoelectric transducer, The European Physical Journal Special Topics 224 (2015) 2755-2770.
7. P. Ribeiro, S. Stoykov, Forced periodic vibrations of cylindrical shells in laminated composites with curvilinear fibres, Composite Structures 131 (2015) 462–478.
8. S. Stoykov, S. Margenov, Numerical computation of periodic responses of nonlinear large-scale systems by shooting method, Computers & Mathematics with Applications 67 (2014) 2257-2267.
9. S. Stoykov, S. Margenov, Nonlinear Vibrations of 3D Laminated Composite Beams, Mathematical Problems in Engineering (2014), Article ID 892782, 14 pages.
10. S. Stoykov, P. Ribeiro, Non-linear vibrations of beams with non-symmetrical cross sections, International Journal of Non-Linear Mechanics 55 (2013) 153–169.
11. V. Stojanović, P. Ribeiro, S. Stoykov, Non-linear vibration of Timoshenko damaged beams by a new p-version finite element method, Computers & Structures 120 (2013) 107-119.
12. S. Stoykov, P. Ribeiro, Vibration analysis of rotating 3D beams by the p-version finite element method, Finite Elements in Analysis and Design 65 (2013) 76-88.
13. S. Stoykov, P. Ribeiro, Stability of nonlinear periodic vibrations of 3D beams, Nonlinear Dynamics 66 (2011) 335-353.
14. S. Stoykov, P. Ribeiro, Nonlinear free vibrations of beams in space due to internal resonance, Journal of Sound and Vibration 330 (2011) 4574-4595.
15. S. Stoykov, P. Ribeiro, Nonlinear forced vibrations and static deformations of 3D beams with rectangular cross section: The influence of warping, shear deformation and longitudinal displacements, International Journal of Mechanical Sciences 52 (2010) 1505-1521.
16. S. Stoykov, P. Ribeiro, Periodic geometrically nonlinear free vibrations of circular plates, Journal of Sound and Vibration 315 (2008) 536-555.

Conference Papers

1. S. Stoykov, E. Manoach, Vibration Based Damage Detection of Rotating Beams, MATEC Web of Conferences (2018), Vol. 148, Article number 14008
2. S. Stoykov, E. Atanassov, S. Margenov, Efficient sparse matrix-matrix multiplication for computing periodic responses by shooting method on Intel Xeon Phi, AIP Conference Proceedings (2016), ISBN: 978-0-7354-1431-0, Paper Id: 110012.
3. S. Stoykov, E. Manoach, Electro-mechanical coupling of rotating 3D beams, MATEC Web of Conferences (2016), Vol. 83, Article number: 05011.
4. S. Stoykov, S. Margenov, Comparative analysis of finite elements for shear locking problems of Mindlin's plate, Proceedings of the International Conference on Numerical Methods for Scientific Computations and Advanced Applications (2016), ISBN: 978-619-7223-18-7, pp. 65-68.
5. S. Stoykov, S. Margenov, Finite element method for nonlinear vibration analysis of plates, Studies in Computational Intelligence Vol. 648, Springer (2016), ISBN: 978-3-319-32206-3, pp. 17-27.
6. S. Stoykov, S. Margenov, Scalability of Shooting Method for Nonlinear Dynamical Systems, In: I. Lirkov, S. Margenov, J. Waśniewski (Еds.), Proceedings of 10th International Conference on Large-Scale Scientific Computations, Lecture Notes in Computer Science Vol. 9374, Springer (2015), ISBN: 978-3-319-26519-3, pp. 401-408.
7. S. Stoykov, S. Harizanov, S. Margenov, Space discretization by B-Splines on discontinuous problems in structural mechanics, Proceedings of the 7th Balkan Conference on Informatics (2015), ISBN: 978-1-4503-3335-1, Paper Id: 31, 7 pages.
8. S. Stoykov, C. Hofreither, S. Margenov, Isogeometric analysis for nonlinear dynamics of Timoshenko beams, In: I. Dimov, S. Fidanova, I. Lirkov (Eds.), Lecture Notes in Computer Science Vol. 8962, Springer (2015), ISBN: 978-3-319-15584-5, pp. 138-146.
9. S. Stoykov, P. Ribeiro, Frequency response of cylindrical variable stiffness composite laminated shells, In: H. Ecker, A. Steindl, S. Jakubek (Eds.), Proceedings of 8th European Nonlinear Dynamics Conference (2014), ISBN: 978-3-200-03433-4, Paper Id: 363, 6 pages.
10. S. Stoykov, The influence of geometrical nonlinearity on the dynamics of elastic structures, Proceedings of the International Conference on Numerical Methods for Scientific Computations and Advanced Applications (2014), ISBN: 978-954-91700-7-8, pp. 103-106.
11. S. Stoykov, S. Margenov, Nonlinear forced vibration analysis of elastic structures by using parallel solvers for Large-Scale Systems, In: I. Lirkov, S. Margenov, J. Waśniewski (Еds.), Proceedings of 9th International Conference on Large-Scale Scientific Computations, Lecture Notes in Computer Science Vol. 8353, Springer (2014), ISBN: 978-3-662-43880-0, pp. 405-412.
12. S. Margenov, S. Stoykov, Y. Vutov, Numerical Homogenization of Heterogeneous Anisotropic Linear Elastic Materials, In: I. Lirkov, S. Margenov, J. Waśniewski (Еds.), Proceedings of 9th International Conference on Large-Scale Scientific Computations, Lecture Notes in Computer Science Vol. 8353, Springer (2014), ISBN: 978-3-662-43880-0, pp. 347-354.
13. S. Stoykov, S. Margenov, Nonlinear free vibrations of 3D composite beams, In: Z. Dimitrovová, J. Almeida, R. Gonçalves (Еds.), Proceedings of the 11th International Conference on Vibration Problems (2013), ISBN: 978-989-96264-4-7, Paper Id: 164, 10 pages.
14. S. Stoykov, S. Margenov, Nonlinear vibrations of rotating 3D tapered beams with arbitrary cross sections, In: M. Papadrakakis, V. Papadopoulos, V. Plevris (Еds.), Proceedings of the 4th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (2013), ISBN: 978-960-99994-2-7, pp. 1883-1897.
15. S. Stoykov, P. Ribeiro, Internal Resonances and Modal Interactions of Nonlinear Free and Forced Vibrations of 3D Rotating Beams, 7th EAWE PhD Seminar on Wind Energy in Europe (2011), Delft University of Technology, Delft, The Netherlands, pp 49-52.
16. S. Stoykov, P. Ribeiro, On the influence of warping, shear and longitudinal displacements on the nonlinear vibrations of beams, In: M. Papadrakakis, N. Lagaros, M. Fragiadakis (Eds.), Proceedings of the 2nd ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (2009), ISBN 978-960-254-682-6, Paper Id: 258, 12 pages.
17. S. Varbanov, S. Stoykov, B. Bontchev, Software Agents in a Serious Business Game - the PRIME Project Case, In: M. Taisch, J. Cassina (Eds.), Learning with Games (2007), ISBN 978-88-901168-0-3, pp. 301-306.
18. S. Stoykov, P. Ribeiro, Geometrically non-linear free vibrations of circular plates using hierarchic basis functions, In: P. Ribeiro, M. Amabili (Eds.), Proceedings of the Euromech Colloquium 483, Geometrically Non-linear Vibrations of Structures (2007), ISBN 978-989-95208-2-0, pp. 93-96.
19. S. Stoykov, P. Ribeiro, Comparative Analysis of Direct Integration Methods of Differential Non-linear Equations of Motion, In: P. Ribeiro, M. Amabili (Eds.), Proceedings of the Euromech Colloquium 483, Geometrically Non-linear Vibrations of Structures (2007), ISBN 978-989-95208-2-0, pp. 97-100.

Reports from workshops

1. P. Iliev, S. Stoykov, B. Markovic, M. Datcheva, L. Yovkov, K. Liolios, C. Menseidov, N. Muthing, T. Barciaga, Rigorous and Approximated Solutions of the Consolidation Problem for a Soil Layer with Finite Thickness under Cyclic Mechanical Loading, The 113th European Study Group with Industry (2015) pp. 74-84, ISBN 978-619-72-23-12-5.
2. H. Ockendon, S. Stoykov, T. Zorawik, S. Dimova, I. Georgiev, N. Kolkovska, M. Todorov, D. Vasileva, Prediction of sanding in subsurface hydrocarbon reservoirs, The 95th European Study Group with Industry (2013) pp. 87-95, ISBN 978-954-9526-84-4.

Scientific Tools

TOBECS (TOol for BEam Cross Sectional analysis)

TOBECS computes numerically the cross sectional properties of given 2D section which represents the cross section of a beam. These coefficients are used at the PDE which describes the equation of motion of beams with arbitrary cross sections.