海洋科学
海洋科學
해양과학
MARINE SCIENCES
2013年
7期
77-82
,共6页
南沙海域%海底沉积物%声速%孔隙度
南沙海域%海底沉積物%聲速%孔隙度
남사해역%해저침적물%성속%공극도
Nansha sea area%marine sediment%acoustic velocity%porosity
采用同轴差距测量法对南沙海域海底沉积物取样进行甲板现场声学测量，并计算了声速，结合沉积物取样分析获得的孔隙度，研究了海底表层100 cm沉积物的声速和孔隙度之间的相互关系，分析获得了孔隙度与海底沉积物声速关系的经验公式，结果表明此海域沉积物声速的临界孔隙度为67.80%。将此公式与国内外其他学者建立的经验公式进行了对比，分析发现各预测方程之间存在着差异，说明不同海域的沉积物声学特性具有差异性，经验公式具有区域性，同时分析了其他影响声速的因素。此项工作对于建立和研究南海声场环境具有重要意义。
採用同軸差距測量法對南沙海域海底沉積物取樣進行甲闆現場聲學測量，併計算瞭聲速，結閤沉積物取樣分析穫得的孔隙度，研究瞭海底錶層100 cm沉積物的聲速和孔隙度之間的相互關繫，分析穫得瞭孔隙度與海底沉積物聲速關繫的經驗公式，結果錶明此海域沉積物聲速的臨界孔隙度為67.80%。將此公式與國內外其他學者建立的經驗公式進行瞭對比，分析髮現各預測方程之間存在著差異，說明不同海域的沉積物聲學特性具有差異性，經驗公式具有區域性，同時分析瞭其他影響聲速的因素。此項工作對于建立和研究南海聲場環境具有重要意義。
채용동축차거측량법대남사해역해저침적물취양진행갑판현장성학측량，병계산료성속，결합침적물취양분석획득적공극도，연구료해저표층100 cm침적물적성속화공극도지간적상호관계，분석획득료공극도여해저침적물성속관계적경험공식，결과표명차해역침적물성속적림계공극도위67.80%。장차공식여국내외기타학자건립적경험공식진행료대비，분석발현각예측방정지간존재착차이，설명불동해역적침적물성학특성구유차이성，경험공식구유구역성，동시분석료기타영향성속적인소。차항공작대우건립화연구남해성장배경구유중요의의。
We used coaxial differential distance attenuation measurement to measure acoustic properties of Nansha sea area marine sediment on deck and calculate sound velocity, combined with laboratory measurement of sediment porosity, studied the correlation between submarine surface 100 cm sediment velocity and porosity, set up an em-pirical formula by using porosity to predict submarine sediment velocity, and found the sediment critical porosity in Nansha sea area is 67.8%. Comparing with other formulas built by Chinese or foreign scholars, we found there is difference between the prediction equations, suggesting that there is difference between different sea sediment acoustic property, and the experience formula has regional restriction. In addition, some other factors influencing sound velocity were also analyzed. This work is of great significance to study and establish the sound field envi-ronment of the South China Sea.
