Asimplifiedtheorymodelforbulkmovementofship-likebeams

subjectedtosphericalshockwaves

LI Hai-tao; ZHU Xi; WANG Lu; ZHANG Zhen-hua

doi:10.11883/1001-1455(2010)01-0085-06

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LI Hai-tao, ZHU Xi, WANG Lu, ZHANG Zhen-hua. Asimplifiedtheorymodelforbulkmovementofship-likebeamssubjectedtosphericalshockwaves[J]. Explosion And Shock Waves, 2010, 30(1): 85-90. doi: 10.11883/1001-1455(2010)01-0085-06

Citation:

LI Hai-tao, ZHU Xi, WANG Lu, ZHANG Zhen-hua. Asimplifiedtheorymodelforbulkmovementofship-likebeams subjectedtosphericalshockwaves[J]. Explosion And Shock Waves, 2010, 30(1): 85-90. doi: 10.11883/1001-1455(2010)01-0085-06

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Asimplifiedtheorymodelforbulkmovementofship-likebeams subjectedtosphericalshockwaves

doi: 10.11883/1001-1455(2010)01-0085-06

1.
Collegeof NavalArchitectureandPower,NavalUniversityofEngineering,
2.
Wuhan 430033,Hubei,China;

Funds:

National973Project(51335020101)

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Corresponding author: LI Hai-tao
Publish Date: 2010-01-25

Abstract

Abstract

Asamainenergyreleasefromunderwaterexplosion,blastcancauselocaldistortionofwarshipstructure, whereas,howthehullwillactagainstshockwavedeservesanadvancedresearch.The hullwassimplifiedasarigid,perfectlyplasticuniformbeamfloatingonwater.Theformulaofthe wallpressureonthewetsurfaceofthebeam wasattainedandmodifiedaccordingtotestdatawhere thefluid-structureinteractionwasconsidered.Inordertostudydynamicresponseofship-likebeams subjectedtounderwaterexplosionlocatedcloselyunderthemid-spanofthebeam,ahypothesiswas putforwardthatthesphericalshockwavespreadingonthehullwascomposedofaseriesofmoving, instantaneous,localplaneshockwaves,andtheresponseofthebeamsubjectedtosphericalshockwave wasequivalenttointegralresponsesduetoalltheplaneshockwaves.Basedonthissimplification,a theoreticalmethodwasproposedtodescribehowthebeamactedagainstunderwaterexplosionatany standoff.Finally,thetwomodelsofship-likebeamswereusedintheteststoverifytheproposed method.Resultsshowthatthetestdatabasicallyagreewiththoseoftheoreticalanalysis.Duringthe durationofshockwaveloadingonthebeam,themid-spanofthebeamtakesaback-and-forthmovement. Shockwavesplayasmallerroleinmakingbeamsbulkmovementthanthatincausinglocaldistortion.
- mechanicsofexplosion,
- theorymodel,
- modeltest,
- ship-likebeam,
- underwaterexplosion,
- sphericalshockwave