Jon Juel Thomsen

Associate professor, dr.techn.

Technical University of Denmark
Department of Mechanical Engineering, Solid Mechanics
Nils Koppels Alle 404
DK-2800 Kgs. Lyngby, Denmark

E-mail: jjt@mek.dtu.dk

Homepage: http://www.fam.mek.dtu.dk/jjt.html

Research

Main areas: Mechanical vibrations and stability (linear and non-linear, theoretical, numerical & experimental), dynamics of structures, mathematical modeling, computer simulation of dynamical systems.

Publications on Non-linear vibrations and stability, artificial neural networks, biomechanics, chaotic vibrations, vibration damping, non-linear dynamic interaction, vibration-induced mass transport, friction-induced vibrations, vibroimpact, fast vibration phenomena / effects of high-frequency excitation, phononic bandgaps, spatio-temporal material property control, Coriolis flowmeter theory.

Teaching

41521 Advanced Vibration and Stability Analysis (Homepage)
41560 Mechanical Vibrations (Homepage, in Danish)
41035 Dynamics and Vibrations (Homepage, in Danish)
41811 Experimental Mechanics (Homepage)

Supervisor of master thesis / ph.d. / bachelor student projects on dynamics and vibrations.

Selected publications [More publications ...]

Thomsen, J.J. and Dahl, J., ‘Analytical predictions for vibration phase shifts along fluid-conveying pipes due to Coriolis forces and imperfections’, Journal of Sound and Vibration, vol. 329, no. 15, pp. 3065-3081, 2010. [DOI]
Thomsen, J.J., 'Effective properties of mechanical systems under high-frequency excitation at multiple frequencies', Journal of Sound and Vibration, Vol. 311, No. 3-5, pp. 1249-1270, 2008. [Abstract / Full text html + links / Full text PDF]
Thomsen, J.J. and Fidlin, A., 'Near-elastic vibro-impact analysis by discontinuous transformations and averaging', Journal of Sound and Vibration, Vol. 311, No. 1-2, pp. 386-407, 2008. [Abstract / Full text html + links / Full text PDF]
Thomsen, J. J., 'Slow high-frequency effects in mechanics: problems, solutions, potentials', International Journal of Bifurcation and Chaos, Vol. 15, No. 9, pp. 2799–2818, 2005. [Abstract / Full text PDF]
Thomsen, J.J, Vibrations and Stability: Advanced Theory, Analysis, and Tools (2nd ed., revised), Springer-Verlag, Berlin Heidelberg, 2003. ISBN 3-540-40140-7. [Description / Reviews / Contents / Amazon.com / Amazon.co.uk / Errata / Solution manual]
Thomsen, J.J., 'Theories and experiments on the stiffening effect of high- frequency excitation for continuous elastic systems', Journal of Sound and Vibration, Vol. 260, No. 1, pp. 117-139, 2003. [Abstract / Full text html + links / Full text PDF]
Thomsen, J.J., Dynamic Effects of Nonlinearity and Fast Vibrations: Stiffening, Biasing, Smoothening, Chaos. Doctoral thesis, Technical University of Denmark, 2003. ISBN 87-90416-05-8.

Thomsen, J.J., 'Some general effects of strong high-frequency excitation: stiffening, biasing, and smoothening', Journal of Sound and Vibration, Vol. 253, No. 4, pp. 807-831, 2002. [Abstract/FullText]

Thomsen, J.J. and Tcherniak, D.M., 'Chelomei's pendulum explained', Proceedings of the Royal Society of London A, Vol. 457, No. 2012, pp. 1889-1913, 2001. [Abstract/FullText]

[More publications ...]