Time-frequencycharacteristicsofshockresponsesofunderwatertarget

tounderwaterexplosion

LI Wan; ZHANG Zhi-hua; ZHOU Feng; ZHANG Tao

doi:10.11883/1001-1455(2012)03-0309-07

Volume 32 Issue 3

May 2014

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Article Navigation > Explosion And Shock Waves > 2012 > 32(3): 309-315

LI Wan, ZHANG Zhi-hua, ZHOU Feng, ZHANG Tao. Time-frequencycharacteristicsofshockresponsesofunderwatertargettounderwaterexplosion[J]. Explosion And Shock Waves, 2012, 32(3): 309-315. doi: 10.11883/1001-1455(2012)03-0309-07

Citation:

LI Wan, ZHANG Zhi-hua, ZHOU Feng, ZHANG Tao. Time-frequencycharacteristicsofshockresponsesofunderwatertarget tounderwaterexplosion[J]. Explosion And Shock Waves, 2012, 32(3): 309-315. doi: 10.11883/1001-1455(2012)03-0309-07

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Time-frequencycharacteristicsofshockresponsesofunderwatertarget tounderwaterexplosion

doi: 10.11883/1001-1455(2012)03-0309-07

1.
WeaponEngineeringDepartment,NavalUniversityofEngineering,
2.
Wuhan 430033,Hubei,China;

Funds:

NationalNaturalScienceFoundationofChina(50775218)

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Corresponding author: LI Wan
Publish Date: 2012-05-25

Abstract

Abstract

Basedontheexperimentaldataofanunderwatertargetsubjectedtounderwaterexplosion, thetime-frequencycharacteristicsofthemonitoredinterioraccelerationsignalswerestudiedbymeans ofwaveletanalysiswithhighresolvabilityandlocalization.Byusingthesesignals,theaccelerationtimecurvesandtheenergydistributionsindifferentblastingfrequencybandswereobtained. Theanalyzedresultsshowthatthewaveletenergyinagivenfrequencybandcancoinstantaneouslyreflectthe influencesofvibrationstrength,frequency,anddurationonthedamageeffectoftheunderwatertarget. Andthedistributionandattenuationdetailinformationoftheshockwaveandsecondarypressure waveindifferentfrequencybandswasobtainedbycombiningtheacceleration-timecurvesindifferent blastingfrequencybands.Thereby,theinfluencesoftheshockwaveandthesecondarypressurewave onthedamageeffectoftheunderwatertargetcanbeassessed,respectively.
- mechanicsofexplosion,
- time-frequencycharacteristic,
- wavelettransform,
- underwater target,
- underwaterexplosion,
- shockwave