Underwatersoundeffectsgeneratedbytunnel-explosionnearthecoastalharbor

LIU Zhen-wen; XU Xiao-mei; QIN Liu-huai

doi:10.11883/1001-1455(2011)01-0088-07

Volume 31 Issue 1

May 2014

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LIU Zhen-wen, XU Xiao-mei, QIN Liu-huai. Underwatersoundeffectsgeneratedbytunnel-explosionnearthecoastalharbor[J]. Explosion And Shock Waves, 2011, 31(1): 88-94. doi: 10.11883/1001-1455(2011)01-0088-07

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Underwatersoundeffectsgeneratedbytunnel-explosionnearthecoastalharbor

doi: 10.11883/1001-1455(2011)01-0088-07

1.
KeyLaboratoryofUnderwaterAcousticCommunicationand MarineInformationTechnology
2.
oftheMinistryofEducation,CollegeofOceanographyandEnvironmentalScience,

Publish Date: 2011-01-25

Abstract

Abstract

Underwatersoundeffectsgeneratedbytunnel-explosionwerestudiedandanobservation wasperformedtomonitortheunderwatersoundpressureinPseudosciaenacroceasbreedingpond whenGuiyutunnelblastengineeringoccurredthithercoastalharborinLuoyuanCounty,FujianProvince. Basedonacoustictheoryoftransmissionandreflectiononsolid-fluidinterface,theresultsshow thatblastingseismicwave makesimpactonunderwaterenvironmentthroughtwokindsofsound transmittedpaths.Theunderwatersoundintensityincreasessharply(upto150dB)inbreedingpond whenGuiyutunnelblastengineeringoccurs,andtheincrementofsoundintensityisdirectlyproportionaltothemassofexplosivesaswellaswhichisinverselyproportionaltothedistancefro blasting point.However,theeffectofdistanceisgreaterthanthatofmass.Additionally,atdifferenttimeof lowtideandhightide,thesoundintensitygeneratedbyblastingseismicwaveinpondhasasignificant differenceduetothetwopathsofsoundpropagationindifferenttransmittedmedia.Withtheincrementofdistance, soundintensityatlowtidetimedeclinesmorequicklythanthatathightidetime. Similarly,thesoundenergydistributioninfrequencybandhasdifferentshape.Soundathightide timeisdominantinfrequencybandof200~1000Hz.Ontheotherhand,thefrequencyofsoundin pondatlowtidetimeismainlylessthan400Hz.Thegreaterofthewaterdepthaboveseabedis,the lowerofthecut-offlowfrequencyisforunderwateracousticwaveguideeffect.Consequently,thelow tidetimeforGuiyutunnelblastingshouldbechosensothatitcandecreasetheharmofhighintensity inPseudosciaenacroceasbreedingpond,avoidingtodoharmtopseudosciaenacroceasbodyinthe soundresonantfrequencyof500~800Hz.
- mechanicsofexplosion,
- soundpropagation,
- blastingseismicwave,
- underwatersound effects,
- pseudosciaenacrocea

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