摘要
研究海底沉积物的声学特性对海洋国防和经济开发具有重要的意义。该文基于Biot-Stoll理论对充液管-海底沉积物中激发产生的模式波的传播特性进行了分析,并数值仿真了海底沉积物声学参数测量的应用。首先,对该模型下的声场进行了求解,建立了模式波的频散方程,研究了管中纵向轴对称模式的传播特性。其次,在纵向L(0,1)模式波传播特性的研究中,数值模拟了接收波形,构建并求解了目标函数,论证了该模式波反演沉积物孔隙参数的可行性。研究结果表明:充液管-海底沉积物模型中的L(0,1)模式波的传播特性对沉积物孔隙参数变化敏感,数值仿真证实了可以利用L(0,1)模式波来反演沉积物孔隙参数。
It is of great significance to study the acoustic characteristics of seafloor sediments for marine national defense and marine economic development.Based on Biot-Stoll theory,this paper analyzes the propagation characteristics of model waves generated by excitation in liquid-filled tube and submarine sediments,and simulates the application of acoustic parameter measurement in seafloor sediments numerically.First,this paper solves the sound field of the model,establishes the dispersion equation of mode waves,and studies the propagation characteristics of longitudinal axisymmetric mode in a tube.Secondly,in the study of the propagation characteristics of longitudinal L(0,1)mode guided waves,this paper simulates numerically the receiving waveform,builds and solves the objective functions,and demonstrates the feasibility of the model wave in retrieving sediment pore parameters.The results show that the propagation characteristics of L(0,1)mode waves in the liquid-filled pipe-seabed sediment model are sensitive to changes in sediment pore parameters and the numerical simulation proves that L(0,1)mode waves can be used to invert sediment pore parameters.
作者
张绍慧
张秀梅
王秀明
赵傲耸
刘琳
ZHANG Shaohui;ZHANG Xiumei;WANG Xiuming;ZHAO Aosong;LIU Lin(State Key Laboratory of Acoustics,Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;Beijing Engineering Research Center for Deep Drilling Exploration and Measurement,Beijing 100190,China)
出处
《应用声学》
CSCD
北大核心
2024年第4期735-741,共7页
Journal of Applied Acoustics
基金
国家自然科学基金项目(11974018,11734017)。
