SIMULATING NON-LINEAR OSCILLATIONS OF AN ELASTIC SPATIAL STRUCTURE UNDER WAVE ACTION
The performed work is dealt with evaluating wave-induced loads on a single cylindrical column by ANSYS software package. Wave action on a spatial structure being a jackup rig prototype is examined. Wave-induced loads were determined by means of ANSYS software package based on Morison equation. Velocity and inertia components of wave-induced impacts were estimated according to the fifth-order Stokes wave theory. Support column interaction with the soil was conditionally simulated by springs. The heading angle effects on the spatial structure were investigated. Natural oscillation frequencies of the structure were calculated. Numerical computing methods were verified.