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1、第24卷第3期现代地质Vol24No32010年6月GEOSCIENCEJun2010气泡半径和含量对含气泡海水声波速度的影响12322李灿苹,刘学伟,杨丽,何静,卢良鑫(1广东海洋大学信息学院,广东湛江524088;2中国地质大学地球物理与信息技术学院,北京100083;3中国石油勘探开发研究院西北分院,甘肃兰州730020)摘要:通过对含气泡的海水水体声波速度的研究,分析了气泡半径和含量对海水声波速度(声速)的影响。气泡半径与海水深度的关系为,随着海水深度变浅,气泡半径逐渐增大。声速与气泡半径的关系为:气泡含量很小时,随着气泡半径的
2、增大,声速先逐渐增大,然后保持平稳,最后缓慢减小,且声速变化幅度较小;气泡含量逐渐增大时,随着气泡半径的增大,声速都逐渐增大,且气泡含量不同,声速变化范围不同。声速与气泡含量的关系为:气泡含量较小时,气泡含量增加,声速逐渐减小;气泡含量较大且气泡半径小于临界半径时,气泡含量增加,声速逐渐减小,气泡半径大于临界半径时,气泡含量增加,声速先减小后逐渐增大,并且在气泡含量逐渐增大的不同阶段,声速的变化范围不同。关键词:气泡半径;气泡含量;天然气水合物;海水;声波速度中图分类号:P6314文献标志码:A文章编号:1000-8527(2010)03-0528-
3、06StudyontheBubbleRadiusandContentEffectontheAcousticVelocityofSeawaterwithBubbles12322LICanping,LIUXuewei,YANGLi,HEJing,LULiangxin(1SchoolofInformation,GuangdongOceanUniversity,Zhanjiang,Guangdong524088,China;2SchoolofGeophysicsandInformationTechnology,ChinaUniversityofGeoscience
4、s,Beijing100083,China;3NorthwestBranchofResearchInstituteofPetroleumExplorationandDevelopment,CNPC,Lanzhou,Gansu730020,China)Abstract:Throughthestudyontheacousticvelocityofseawaterwithgasbubbles,theconclusionwasobtainedasfollows.(1)Therelationshipbetweenthebubbleradiusandtheseawaterd
5、epthwasthatthebubbleradiuswasbiggerastheseawaterwasshallower.(2)Therelationshipbetweentheacousticvelocityandthebubbleradiuswasthatwhenthebubblecontentwasverylittle,withthebubbleradiusbecominglarger,theacousticvelocityincreasedgraduallyatfirstandthenkeepunchangedandfinallydecreasedslow
6、ly,andtheextentoftheacousticvelocityvariationwasnotlarge;whenthebubblecontentincreasedgradually,withthebubbleradiusbecominglarger,theacousticvelocityincreasedgradually,andthevaryingrangeoftheacousticvelocitywasdifferentifthebubblecontentwasvaried.(3)Therelationshipbetweentheacousticvelo
7、cityandthebubblecontentwasthatwhenthebubblecontentwassmal,lwiththebubblecontentincreasing,theacousticvelocitydecreasedgradually;whenthebubblecontentwaslargerandthebubbleradiuswassmallerthanthecriticalradius,withthebubblecontentincreasing,theacousticvelocitydecreasedgradually;w
