Fedorov S. Methods and means of operational monitoring of marine environment parameters impacting on the offshore installation

It was offered an integrated system of operative control of the hydrodynamic and ice loads acting on offshore installation in operating condition, the parameters of the erosion of foundations and underwater pipelines. Software was realized for effective work of this system, which includes validated mathematical models SWAN, Cosmos FloWorks, and a hydrodynamic model of flow pipeline and forecast model of erosion of substructures, developed by the author. It was developed a method for adjusting of coefficients of the wave energy dissipation in SWAN model from satellite altimeters. I was developed the hydrodynamic model of flow near underwater pipeline lying on an arbitrary distance from the sea bed. To verify this model, a series of physical laboratory experiments in the wave basin was carried out. For this purpose a new discrete devices and methods of its use were created, a technique for laboratory studies of wave impact on underwater pipelines was developed. It was improved a numerical method for estimating of erosion dynamics of substructures of drilling rigs and terminals, underwater pipelines, and other stationary structures. In contrast to existing methods it takes into account a distribution of fractions of bottom material by their size, the local slope of the seabed and the effect of soil creep.