Sediment's influence on Scholte wave by tank experiment
With less attenuation and longer transmission distance,Scholte waves at the seafloor interface can be applied in underwater target detection and seafloor parameter inversion.In the real ocean,the sediment between the seawater and the elastic seafloor could significantly affect the excitation and propagation of Scholte waves.In this paper,by scaling down the real ocean environment to laboratory scale according to the scale principle,a tank experiment is designed and carried out to investigate the excitation and propagation of Scholte waves in an experimental environment containing sediment using Scholte wave identification method based on acoustic pressure field measurement.It is shown in results that under the experimental conditions,Scholte waves could still be excited at the seafloor interface with the sediment of 1 mm thickness,but the sediment increases its attenuation;and the thicker sediment would prevent Scholte waves'excitation.According to the scaling principle,the experimental environment can be converted to the real ocean environment with a source frequency of 10 Hz,a water depth of 3000 m and a sediment thickness of 5 m,i.e.,in the above-mentioned real ocean environment,Scholte waves at the seafloor could be excited normally,and slit sediment thicker than 5 m would cause the failure of Scholte waves'excitation.
万方数据
维普
