Work

Object of research is the process of generation, propagation and interaction of surface solitary waves with topographical features of the wave channel. A purpose of the work is the investigation of the processes of generation, propagation of surface solitary waves and their interaction with different obstacles by physical simulation in laboratory channel; determination of main patterns which describe the interaction of surface solitary waves with steep slopes and topographical features of the channels, analysis of effect nonlinearity on interaction processes with obstacles. A research method is the physical simulation of the processes of propagation of surface solitary waves and their interaction with slopes and underwater obstacles. The detailed description of the experimental setup and the technique of conduction the experimental studies are presented. For reasons given the experimental study of the interaction process of solitary with slopes and underwater obstacles as “vertical plate”, “rectangular step” and “berm” are performed. Slopes of the different angles in respect to horizon have been considered. As a result of study the interaction of solitary waves with slopes the main characteristics of waves propagating in the channel, the heights of run-up on slopes and the reflection coefficients of solitary waves depending on slope angle have been obtained. Comparison of the results with known analytical relationships and experimental data has been fulfilled. It is found that dispersive “train” is formed during run-down of the wave over slope, and the amplitude-frequency characteristics of the train have been determined. In the investigation of interaction of solitary waves with underwater obstacles it is shown that two scenarios are realized: transformation and interaction. The criterion determining the realization of these scenarios has been proposed. It is demonstrated that the obstacle length has a substantial effect on the process of interaction of wave with obstacle. Application domain is prediction of nonlinear wave in ocean and effects their interaction with offshore strips; designing of construction arrangements of hydraulic facilities in coastal zone and underwater structure for dissipation of wave energy and coastal protection from erosion. Keywords: solitary wave, slope, “dispersive train”, underwater obstacle, coefficient of reflection and transmission.