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On conservation of energy and kinematic compatibility in dynamics of nonlinear velocity-based three-dimensional beamsZupan, Eva ; Zupan, Dejan, mehanikIn this paper, we present an original energypreserving numerical formulation for velocity-based geometrically exact three-dimensional beams. We employ the algebra of quaternions as a suitable tool to ... express the governing equations and relate rotations with their derivatives,while the finite-element discretization is based on interpolation of velocities in a fixed frame and angular velocities in a moving frame description. The proposed time discretization of governing equations directly relates the energy conservation constraint with the time-discrete kinematic compatibility equations. We show that a suitable choice of primary unknowns together with a convenient choice of the frame of reference for quantities and equations is beneficial for the conservation of energy and enables admissible approximations in a simple manner and without any additional effort. The result of this study is simple and efficient, yet accurate and robust numerical model.Source: Nonlinear dynamics. - ISSN 0924-090X (Letn. 95, št. 2, jan. 2019, str. 1379-1394)Type of material - article, component part ; adult, seriousPublish date - 2019Language - englishCOBISS.SI-ID - 8601953
Author
Zupan, Eva |
Zupan, Dejan, mehanik
Topics
dinamika konstrukcij |
nelinearni nosilci |
kinematična kompatibilnost |
ohranjanje energije |
rotacijski kvaternioni |
implicitna časovna integracija |
structural dynamics |
non-linear beams |
kinematic compatibility |
energy conservation |
rotational quaternions |
implicit time integration
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Zupan, Eva | 27673 |
Zupan, Dejan, mehanik | 19121 |
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