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PROCEEDINGS OF THE FIFTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING
Edited by: J. Kruis, Y. Tsompanakis and B.H.V. Topping
Warping Free Vibration of Thin Walled Beams: Experimental Verification and Modelling
J. Murín1, V. Goga1, M. Aminbaghai2, J. Hrabovský1, T. Sedlár1, V. Kutiš1 and J. Paulech1
1Department of Applied Mechanics and Mechatronics, Institute of Automotive Mechatronics, Faculty of Electrical Engineering and Information Technology, Slovak University of Technology in Bratislava, Slovakia
J. Murín, V. Goga, M. Aminbaghai, J. Hrabovský, T. Sedlár, V. KutiĀš, J. Paulech, "Warping Free Vibration of Thin Walled Beams: Experimental Verification and Modelling", in J. Kruis, Y. Tsompanakis, B.H.V. Topping, (Editors), "Proceedings of the Fifteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 210, 2015. doi:10.4203/ccp.108.210
Keywords: nonuniform torsion, warping free vibration, hollow section beams, experimental verification, modelling and simulation..
In this paper the results of the experimental measurement of the torsional free vibration of hollow cross-section beams are presented. The experimental results are compared with those obtained by the proposed semi analytical method and finite element calculations by means of a standard commercial code. In the finite element calculations the beam and solid finite elements are used. In the semi-analytical calculations our new approach is used that is based on the analogy between the second order beam theory and the nonuniform torsion with consideration of the secondary torsion moment deformation effect (STMDE). The effects of inclusion of warping and secondary torsion moment and hollow cross-section beam geometry on the torsional eigenfrequencies and eigenforms are studied and evaluated. The agreement of the measured and calculated eigenfrequencies is evaluated and discussed.
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