Spatial vibrations of hose constructions are considered with points of fastening under non-stationary kinematic actions. A model of hard rigid string is accepted as a computational model. The finite-difference method for the solution of equations of motion was used. A computational algorithm and a FORTRAN program were developed. The algorithm takes into account physical, geometrical and exploitative peculiarities of the constructions: bending stiffness, non-uniformity, geometrical non-linearity, conditions of fastening, internal/external hydrodynamics and internal dissipation of energy by friction between construction elements. It does not put any restraints on the initial form of construction, displacements and parameters of actions. As an example of practical application, a dynamics analysis of mooring utility systems under rough seas and wind loads was performed. Transient and steady-state modes of vibration were studied. Extreme generalized tensions and displacements of the construction were obtained as a function of roughness parameters, wind velocity and wind orientation, and geometrical and physical parameters of the construction.
Mathematical modeling of spatial vibrations of lengthy hose structures
Mathematische Modellierung der räumlichen Schwingungen von langen Schlauchstrukturen
Ocean Engineering ; 23 , 3 ; 257-269
1996
13 Seiten, 8 Bilder, 8 Quellen
Article (Journal)
English
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