| 张绍慧,张秀梅,王秀明,赵傲耸,刘琳.基于Biot-Stoll理论的充液管-海底沉积物导波的传播特性*[J].,2024,43(4):735-741 |
| 基于Biot-Stoll理论的充液管-海底沉积物导波的传播特性* |
| Propagation characteristics of guided waves in seafloor sediments based on Biot-Stoll Theory |
| 投稿时间：2023-02-23 修订日期：2024-07-04 |
| 中文摘要: |
| 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。本文基于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。并就纵向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。 |
| 英文摘要: |
| 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. And for 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, 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. |
| DOI：10.11684/j.issn.1000-310X.2024.04.004 |
| 中文关键词: 导波 Biot-Stoll理论 参数反演 |
| 英文关键词: Guided wave Biot-Stoll theory Parameter inversion |
| 基金项目:基于随机渗透率模型的孔隙地层井孔声场理论研究及渗透率反演；随钻测量中的非轴对称的井孔声场 |
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