Page 153 - 《应用声学》2025年第2期

第 44 卷 第 2 期 Vol. 44, No. 2
2025 年 3 月 Journal of Applied Acoustics March, 2025

⋄ 研究论文 ⋄

海底沉积物纵波声速随孔隙度变化的物理机制 ∗

李赶先 1† 龙建军 2

(1 中国科学院边缘海与大洋地质重点实验室 南海海洋研究所 南海生态环境工程创新研究院 广州 510301)
(2 广东工业大学机电工程学院 广州 510006)
摘要：为建立高精度海底沉积物纵波声速预估公式和揭示沉积物纵波声速与相关参数响应机制，通过对
海底沉积物测试数据统计分析，研究发现了海底沉积物纵波声速随孔隙度变化的最小值，并用一元二次
函数的最小值坐标公式，对该文及众多学者得到的不同海区沉积物纵波声速随孔隙度变化的最小值及其
孔隙度临界值进行了统一分析。计算表明，不同海区沉积物纵波声速随孔隙度变化的最小值变动范围在
1468.59 ∼ 1520.22 m/s 之间，相应孔隙度临界值变动范围在 0.69 ∼ 0.88 之间。分析表明，不同学者的经验公
式归属于声学理论推导的统一数学表达形式。研究表明，海底沉积物纵波声速随孔隙度变化最小值形成是由
沉积物颗粒耦合作用影响纵波传播造成的，进而揭示出海底沉积物的颗粒在海水中的接触或悬浮状态、弹性
应变变化等因素影响纵波声速变化的物理机制。
关键词：海底沉积物；纵波声速；最小值；孔隙度；颗粒悬浮
中图法分类号: P733.23 文献标识码: A 文章编号: 1000-310X(2025)02-0413-10
DOI: 10.11684/j.issn.1000-310X.2025.02.016

The physical mechanism of the variation of longitudinal wave sound velocity
with porosity in submarine sediments

1
LI Ganxian and LONG Jianjun 2
(1 Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Innovation Academy of
South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou 510301, China)
(2 School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China)

Abstract: In order to establish a high-precision formula for predicting the longitudinal wave sound velocity
of seafloor sediments and reveal the response mechanism between the longitudinal wave sound velocity of sed-
iments and related parameters, through statistical analysis of seafloor sediment test data, the minimum value
of the longitudinal wave sound velocity of seafloor sediments with porosity was found, and the minimum coor-
dinate formula of a univariate quadratic function was used. A unified analysis was conducted on the minimum
values and critical porosity values of the variation of longitudinal wave sound velocity with porosity obtained by
this article and many scholars in different sea areas. The calculation shows that the minimum variation range
of longitudinal wave sound velocity with porosity variation in sediments from different sea areas is between
1468.59 to 1520.22 m/s, and the corresponding critical porosity value variation range is between 0.69 and 0.88.
Analysis shows that the empirical formulas of different scholars belong to a unified mathematical expression

2023-10-13 收稿; 2023-12-27 定稿
国家自然科学基金项目 (41976180)
∗
作者简介: 李赶先 (1963– ), 男, 山东潍坊人, 硕士, 副研究员, 研究方向: 海底沉积声学。
† 通信作者 E-mail: djtlgx@163.com