ON THE RESONANT GENERATION OF WEAKLY NONLINEAR STOKES WAVES IN REGIONS WITH FAST VARYING TOPOGRAPHY AND FREE SURFACE CURRENT  

作　　者：黄虎 周锡礽 

机构地区：[1]School of Civil Engineering,Tianjin University,Tianjin 300072,P R China [2]Shanghai Institute of Applied Mathematics and Mechanics,Shanghai University,Shanghai 200072,P R China

出　　处：《Applied Mathematics and Mechanics(English Edition)》2001年第6期730-740,共11页应用数学和力学（英文版）

基　　金：theDoctoralProgramFundofChinaEducationCommission ( 940 5 62 ) ;theChinaNationalFoundationofHighPerformanceComputer( 961 0 3 )

摘　　要：The effect of nonlinearity on the free surface wave resonated by an incident flow over rippled beds, which consist of fast varying topography superimposed on an otherwise slowly varying mean depth, is studied using a WKBJ-type perturbation approach. Synchronous, superharmonic and in particular subharmonic resonance were selectively excited over the fast varying topography with corresponding wavelengths. For a steady current the dynamical system is autonomous and the possible nonlinear steady states and their stability were investigated. When the current has a small oscillatory component the dynamical system becomes non-autonomous, chaos is now possible.The effect of nonlinearity on the free surface wave resonated by an incident flow over rippled beds, which consist of fast varying topography superimposed on an otherwise slowly varying mean depth, is studied using a WKBJ-type perturbation approach. Synchronous, superharmonic and in particular subharmonic resonance were selectively excited over the fast varying topography with corresponding wavelengths. For a steady current the dynamical system is autonomous and the possible nonlinear steady states and their stability were investigated. When the current has a small oscillatory component the dynamical system becomes non-autonomous, chaos is now possible.

关 键 词：nonlinear resonance weakly nonlinear Stokes waves a free surface current rippled beds dynamical system 

分 类 号：O353.2[理学—流体力学]