Computationalmodelandsafetycriterionofblastingvibrationeffectbased

onwaveletpackettechniques

CHEN Shi-hai; WEI Hai-xia; ZHANG An-kang; MAO Xiao-hui

doi:10.11883/1001-1455(2010)04-0377-06

Volume 30 Issue 4

May 2014

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Article Navigation > Explosion And Shock Waves > 2010 > 30(4): 377-382

CHEN Shi-hai, WEI Hai-xia, ZHANG An-kang, MAO Xiao-hui. Computationalmodelandsafetycriterionofblastingvibrationeffectbasedonwaveletpackettechniques[J]. Explosion And Shock Waves, 2010, 30(4): 377-382. doi: 10.11883/1001-1455(2010)04-0377-06

Citation:

CHEN Shi-hai, WEI Hai-xia, ZHANG An-kang, MAO Xiao-hui. Computationalmodelandsafetycriterionofblastingvibrationeffectbased onwaveletpackettechniques[J]. Explosion And Shock Waves, 2010, 30(4): 377-382. doi: 10.11883/1001-1455(2010)04-0377-06

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Computationalmodelandsafetycriterionofblastingvibrationeffectbased onwaveletpackettechniques

doi: 10.11883/1001-1455(2010)04-0377-06

1.
CollegeofCivilEngineeringandArchitecture,ShandongUniversityof
2.
ScienceandTechnology,Qingdao266510,Shandong,China;

Funds:

NationalNaturalScienceFoundationofChina(50778107)

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Corresponding author: CHEN Shi-hai
Publish Date: 2010-07-25

Abstract

Abstract

Complexmeasuredvelocitysignalsofblastingvibrationaretransformedintothesuperpositionofseveralsimpleharmonicwavesbythewaveletpac etdecompositionandreconstructiontechniques. Inthisway,theproblemofstructuraldynamicresponseundertheactionofblastingvelocity loadbecomestheproblemofthatunderaseriesofsimpleharmonicloads.Byintroducinganewconceptofvelocityfactorintothecomputationalmodelofblastingvibrationeffect, thecontributionof structuraltransientresponseisconsideredintostructuraldynamicresponse.Atthemeantime,normalizedenergyproportionisaddedtothecomputationalmodel, andonlydominantfrequenciesofrelativelylargeenergyproportionscanbeincludedwhenconsideringtheinfluenceofblastingloadfrequencies Then,onthebasisofthemodelabove,anewsafetycriterionofblastingvibrationeffectis putforward,whichcanreflecttherelationbetweenthestructuralvelocityresponsemagnitudeunder blastingloadstimulationandthefollowingparameters:structuralcharacteristics,amplitude,frequenciesincludingseveraldominantfrequencies, durationandenergyproportionofblastingload.In theend,bycombiningwithanactualengineeringcase,velocityresponseamplitudesarecalculatedby thecomputationalmodelputforwardinthispaperandthetemporalanalysismethod,respectively. Andthecomputationalresultsshowthatthiscomputationalmodelisfeasible.
- mechanicsofexplosion,
- safetycriterion,
- waveletpacket,
- blastingvibration,
- velocityfactor

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