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Z. Lozina, D. Sedlar, A. Bartulovic, "Modal superposition of non-classically damped transient problems with position and velocity dependent force", in B.H.V. Topping, J. Kruis, (Editors), "Proceedings of the Fourteenth International Conference on Computational Structures Technology", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 3, Paper 19.3, 2022, doi:10.4203/ccc.3.19.3

Keywords: non-classical damping, modal superposition, nonlinear problem, transient vibration, numerical integration, ship power propulsion.

Abstract

The approach to the solution of transient problems of the semidefinite systems with non-classical damping and force dependent on time, position and velocity is proposed and implemented. It provides reliable, efficient and accurate solution algorithm without blurring the physical meaning. The problem matrix is constant even the problem is nonlinear, its inversion is trivial, and order is controllable. The price is solution of the eignproblem and transformations between natural and principal coordinates. However, in spite of the iterative procedure, modal approach is proved to be highly efficient with maximum two tightening iteration per step for given integration parameters, practically independently on the integration scheme involved. The contribution is illustrated with theoretical and practical examples. The proposed procedure eliminates nonphysical behaviour of the semidefinite problems under reactive force e.g. as in the ship power propulsion

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 3 PROCEEDINGS OF THE FOURTEENTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY Edited by: B.H.V. Topping and J. Kruis Paper 19.3 Modal superposition of non-classically damped transient problems with position and velocity dependent force Z. Lozina, D. Sedlar and A. Bartulovic University of Split, FESB, Split, Croatia doi:10.4203/ccc.3.19.3 Full Bibliographic Reference for this paper Z. Lozina, D. Sedlar, A. Bartulovic, "Modal superposition of non-classically damped transient problems with position and velocity dependent force", in B.H.V. Topping, J. Kruis, (Editors), "Proceedings of the Fourteenth International Conference on Computational Structures Technology", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 3, Paper 19.3, 2022, doi:10.4203/ccc.3.19.3 Keywords: non-classical damping, modal superposition, nonlinear problem, transient vibration, numerical integration, ship power propulsion. Abstract The approach to the solution of transient problems of the semidefinite systems with non-classical damping and force dependent on time, position and velocity is proposed and implemented. It provides reliable, efficient and accurate solution algorithm without blurring the physical meaning. The problem matrix is constant even the problem is nonlinear, its inversion is trivial, and order is controllable. The price is solution of the eignproblem and transformations between natural and principal coordinates. However, in spite of the iterative procedure, modal approach is proved to be highly efficient with maximum two tightening iteration per step for given integration parameters, practically independently on the integration scheme involved. The contribution is illustrated with theoretical and practical examples. The proposed procedure eliminates nonphysical behaviour of the semidefinite problems under reactive force e.g. as in the ship power propulsion download the full-text of this paper (PDF, 6 pages, 649 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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