文章摘要
吴锦虹,邹大鹏,吴百海,卢博,曾洁莹.海底沉积物样品声衰减与温度关系的实验研究[J].声学技术,2008,(5):631~635
海底沉积物样品声衰减与温度关系的实验研究
Experimental study of the relationship between temperature and acoustic attenuation of seafloor sediments
投稿时间:2007-08-01  修订日期:2008-10-21
DOI:
中文关键词: 海底沉积物  声衰减  温度  声学测量
英文关键词: seafloor sediments  acoustic attenuation  temperature  acoustic measurement
基金项目:国家自然科学基金项目(40676040,40476020)
作者单位E-mail
吴锦虹 广东工业大学机电学院, 广州, 510090  
邹大鹏 广东工业大学机电学院, 广州, 510090 anthonyzou@126.com 
吴百海 广东工业大学机电学院, 广州, 510090  
卢博 中国科学院南海海洋研究所边缘海地质重点实验室, 广州, 510301  
曾洁莹 广东工业大学机电学院, 广州, 510090  
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中文摘要:
      不同海区海水温度不同,导致不同海区沉积物温度不同;实验室环境温度变化造成沉积物温度的变化。模拟沉积物的温度变化来研究沉积物声衰减的变化,分别从声衰减系数和本文提出的温变衰减系数描述声衰减。以原状样品和人工样品为例说明了在一定厚度的海底沉积物中,声波的传播能力受到沉积物本身分布的均匀度的影响,会出现不同的衰减趋势;通过定义温变衰减系数得到了海底沉积物对能量的传播能力随温度的升高而降低。
英文摘要:
      The temperature difference between sea areas cause seafloor sediments' temperature not identical.Similarly the environmental temperature change in laboratory causes the change of sediment sample's temperature.The variation of acoustic attenuation of sediments has been studied by simulating the temperature change of sediments.A temperature varying attenuation coefficient is put forward to show the variation of acoustic attenuation at a certain spot in sediments.And the acoustic attenuation is described by the acoustic attenuation coefficient and the temperature varying attenuation coefficient respectively.With the sediment sample in previous condition the effect of the temperature uniformity within sediments on the sound energy transmission is explained.Different attenuation tendencies can be seen,and the transmission ability of sound energy in sediments decreases with the increase of sediment temperature.
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