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龙建军,李赶先,邹大鹏.海底沉积物纵波波速与物理-力学性质的理论关系和比较[J].海洋学报,2014,36(7):111-117
海底沉积物纵波波速与物理-力学性质的理论关系和比较
Theoretical relations of longitudinal wave velocity and physical-mechanical properties for seafloor sediments and comparison
投稿时间:2013-08-31  修订日期:2013-11-11
DOI:10.3969/j.issn.0253-4193.2014.04.012
中文关键词:  海底沉积物  纵波波速  物理性质  多项式模型
英文关键词:acouso-physical properties  wave velocity  seafloor sediment  polynomial model
基金项目:国家自然科学基金(41176034,11174299);中国科学院三亚深海科学与工程研究所知识创新工程领域前沿项目(SIDSSE-201208);国家973项目(6131870102);广东省自然科学基金(10151009001000052)。
作者单位E-mail
龙建军 广东工业大学 机电工程学院, 广东 广州 510006
中国科学院 三亚深海科学与工程研究所, 海南 三亚 572000 
 
李赶先 中国科学院 南海海洋研究所 中国科学院边缘海地质重点实验室, 广东 广州 510301 djtlgx@163.com 
邹大鹏 广东工业大学 机电工程学院, 广东 广州 510006  
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中文摘要:
      本文提出以密度变化比和等效弹性模量变化比为参数描述海底沉积物纵波波速,得到密度变化比是由孔隙率、海水密度和海底沉积物固相密度构成的复合参数,建立了以复合参数和等效弹性模量变化比为变量的泰勒多项式海底沉积物纵波波速公式。基于单因素分析法得出纵波波速可表示为参考声速与调制函数的乘积,沉积物的参考声速由海底底质物理性质确定,建立了复合参数-声速的近似理论模型。对该理论模型与现有的主要纵波波速经验公式的分析结果表明,孔隙率-纵波波速经验公式只是参考声速不同,但调制函数是互相等效的,验证了本文海底沉积物纵波波速理论关系的有效性。
英文摘要:
      To describe a longitudinal wave velocity of seafloor sediments,a ratio of the density variation (RDV) and a ratio of the effective elastic modulus variation (REEMV) are introduced,and then we conclude that the ratio of density variation is a composite parameter consisting of porosity,seawater density and density of solid phase of seafloor sediment. The longitudinal wave velocity can be expressed as a Taylor polynomial function of both the RDV and the REEMV. On basis of univariate analysis,the longitudinal wave velocity can be also written as a product of a reference wave velocity and a modulation function,and the theoretical results show that the reference wave velocity is determined by the physical properties of seafloor sediments,and a theoretical model of the composite parameter-longitudinal wave velocity is attained. By means of the model,the analysis of the some main presented empirical formulas of longitudinal wave velocity as a function of porosity shows that the reference wave velocity of these formulas are different each other but the modulation functions derived from these formulas are mutually equivalent. It shows that the proposed relationship between longitudinal wave velocity and physical-mechanical properties of seafloor sediments has turned out to be valid.
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