中国物理B ›› 2016, Vol. 25 ›› Issue (12): 124312-124312.doi: 10.1088/1674-1056/25/12/124312
• SPECIAL TOPIC—Acoustics • 上一篇 下一篇
Bo Lei(雷波), Yi-Xin Yang(杨益新), Yuan-Liang Ma(马远良), Dong-Xu Chen(陈东旭)
Bo Lei(雷波), Yi-Xin Yang(杨益新), Yuan-Liang Ma(马远良), Dong-Xu Chen(陈东旭)
摘要:
Acoustic scattering from a rough sea bottom is recognized as a main source of reverberation. In this study, scattering properties from a layered bottom were exploited based on the finite element model. The scattering strength and loss from the layered rough seabed were investigated by ensembling the realizations of rough interface. They were found to be dependent on the thickness of sediment, and interference was significant in the case of thin sediment. Through verification of the finite element model, the scattering loss could be evaluated using the Eckart model with a proper sound speed in the thick sediment. The multiple scattering effect on the sound field was also exploited. It revealed that the effect depended strongly on the bottom type.
中图分类号: (Rough interface scattering)