哈尔滨工程大学学报2024，Vol.45Issue(1)：189-197,9.DOI:10.11990/jheu.202110042
中国近海主要表层沉积物类型的原位声学特性
In-situ acoustic properties of the main types of sediment in the offshore areas of China
摘要
Abstract
The acoustic properties of the surficial sediment at the seafloor are essential influential factors in underwa-ter sound propagation and acoustic detection;different sediment types show distinct acoustic properties.Aiming at the demand of marine acoustic research for quickly obtaining the acoustic property parameters at the seafloor,based on the in-situ survey data of the acoustic properties and the testing data on the sediment samples at 100 stations ob-tained in recent years,this paper conducts statistics on the acoustic properties such as the sound speed and attenua-tion coefficient and the physical properties such as the mean grain size and density of eight typical sediment types in the offshore areas of China.By comparing the survey data and the statistical results of the predecessors,it is shown that they have excellent consistency with the data obtained in multiple in-situ survey systems;however,parameters such as the sound speed ratio and attenuation factor obtained by Hamilton are substantially high.The calculation re-sults obtained using the frequency dispersion model based on the VGS theory show that the overhigh Hamilton statis-tical results are not completely caused by the higher survey frequency.For the marine areas lacking direct survey data,the statistical results in the paper provide a scheme for estimating preliminarily the acoustic properties at the seafloor based on the sediment type.关键词
沉积类型/声速/声衰减/频散/原位测量/密度/孔隙度/中国近海Key words
sediment type/sound speed/acoustic attenuation/frequency dispersion/in-situ measurement/density/porosity/offshore areas of China分类
海洋科学引用本文复制引用
李官保,王景强,孟祥梅,阚光明,刘保华..中国近海主要表层沉积物类型的原位声学特性[J].哈尔滨工程大学学报,2024,45(1):189-197,9.基金项目
国家自然科学基金项目(42076082,42176191) （42076082,42176191）
崂山实验室科技创新项目(LSKJ202204800). （LSKJ202204800）
