Oscillations of offshore drilling platforms on layerd anisotropic base

Abstract

Abstract The article presents the results of the studies, including the elements of a theoretical calculation, factors of internal strength and deformation field during volumetric vibrations of offshore drilling platforms on a layered basis. The influence of factors such as seismic dynamic impacts at the regional scale and dynamics of the geomorphology of the sea floor have been studied. Structures with spatial resilient links connected rigidly, hingedly or otherwise are subjected to dynamic force action. Depending on the size of the external forces and the forces of inertia, the flexible elements of the structure of the offshore drilling platform are in a complex three-dimensional stress-strain state. In dynamic calculation of the characteristics of the systems, the finite element method was used by replacing the platform with a system with a finite number of nodal points interconnected by inertia less rods. The masses are concentrated at the nodal points.