In ordertoextendtheoperatingtime,an

In ordertoextendtheoperatingtime,andtoimprovethe
repeatabilityofthetestresultscorrespondingtothedesign
modifications,thetestfixturemethod(refertoSection2and
Fig. 4) wasusedfortheexperiment.Thetestwasconductedatthe
AcousticsandVibrationLaboratoryofMechanicalEngineering
Department,theUniversityofMichigan—Dearborn.Thevibration
oftherivethammerwasmeasuredbytwoaccelerometers,oneat
the handleandtheotheroneatthebackofthecylinder(barrel).The
accelerationofthebuckingbarwassensedbyanaccelerometerthat
isscrewedintothebackofthebuckingbaratitscentralaxial
position.Theaccelerometerwasconnectedtoacharge-amplifier
andwassplitintotheinputsoftwoB&K2034FFTdigitalanalyzers,
oneissetat400Hzandtheotheroneat1600Hzfrequencyspan.A
computerprogramwasdevelopedto calculatetheone-thirdoctave
spectrumaswellasweightedaccelerationsofeachtest.

ผลลัพธ์ (ไทย) 1:

ใน ordertoextendtheoperatingtime, andtoimprovetherepeatabilityofthetestresultscorrespondingtothedesignปรับเปลี่ยน thetestfixturemethod (refertoSection2andFig. 4) wasusedfortheexperiment ThetestwasconductedattheAcousticsandVibrationLaboratoryofMechanicalEngineeringDepartment,theUniversityofMichigan—Dearborn.Thevibrationoftherivethammerwasmeasuredbytwoaccelerometers, oneathandleandtheotheroneatthebackofthecylinder(barrel) ที่accelerationofthebuckingbarwassensedbyanaccelerometerthatisscrewedintothebackofthebuckingbaratitscentralaxialตำแหน่ง เพาเวอร์แอมป์ TheaccelerometerwasconnectedtoachargeandwassplitintotheinputsoftwoB และ K2034FFTdigitalanalyzersoneissetat400Hzandtheotheroneat1600Hzfrequencyspan.Acomputerprogramwasdevelopedto calculatetheone-thirdoctavespectrumaswellasweightedaccelerationsofeachtest

ผลลัพธ์ (ไทย) 3:

ใน ordertoextendtheoperatingtime andtoimprovethe

, repeatabilityofthetestresultscorrespondingtothedesign ปรับเปลี่ยน thetestfixturemethod ( refertosection2and
รูปที่ 4 ) wasusedfortheexperiment . thetestwasconductedatthe

acousticsandvibrationlaboratoryofmechanicalengineering แผนก theuniversityofmichigan เดียร์บอร์น thevibration oftherivethammerwasmeasuredbytwoaccelerometers oneat

,การ handleandtheotheroneatthebackofthecylinder ( บาเรล )


accelerationofthebuckingbarwassensedbyanaccelerometerthat isscrewedintothebackofthebuckingbaratitscentralaxial ตำแหน่ง theaccelerometerwasconnectedtoacharge เครื่องขยายเสียง andwassplitintotheinputsoftwob & k2034fftdigitalanalyzers oneissetat400hzandtheotheroneat1600hzfrequencyspan

, .

computerprogramwasdevelopedto calculatetheone thirdoctavespectrumaswellasweightedaccelerationsofeachtest .