Author(s): A. V. Mishouev; N. A. Prikazchikov
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Keywords: No Keywords
Abstract: The interactions between long waves and marine protecting structureshave been studied inadequately.The mathematical models applied are stil1imperfect.The studies have been mainly focused on the ful1 solitary wavereflection from a vertical wal1.Neither theory,nor experiments on thewave-structure interactions could define both the transformation process ofthe broken wave and the parameters of a wave passing over an obstacle.Thefull reflection is besically viewed in the context of the wave load to bedetermined,with no overflow effect accounted.Saint-Venant equations indivergent form,i.e.within the laws of mass and momentum conservation,canbe considered as initial for describing the transformation and propagationof long waves with the broken front.The paper presents the results of theexperiments and analytical calculations of Saint-Venant equations in theone-dimansional formulation of the problem as to define the flow parametersfor the wave reflection from the vertical wall(Nakamura,Shiraishi andSasaki,1969).However the dynamics of the passed wave is still unknown.n this case,for the flow with the long wave passing through the local re-gions in the neighbourhood of hydraulic structures,this one can be quasi-stationary.It holds that flow parameters can be defined much faster thanwave parameters changes due to its fairly large length in the flowing zone.Following this assumption,from some moment of time the stationary laws ofmass and energy conservation can be applied to these regions.This approachenables to integrate Saint-Venant equations for separate regions of theflow and obtain the algebrain system of equations.
Year: 1989