电磁轨道炮机电耦合强迫响应研究.pdf

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1、中国科技论文在线http://www.paper.edu.cnElectromechanicalCoupledForcedResponseof#ElectromagneticRailguns*5XULizhong,WUDewen(Schoolofmechanicalengineering,YanshanUniversity)Abstract:Therailgunsystemisanelectromechanicalcoupledsystem.Theelectromagneticfieldmayca

2、useanessentialchangeofthedynamicbehaviorsoftherailgunsystem.Basedontheelectromagnetictheory,theelectromechanicalcoupledforcedresponseequationfortherailgunisgiven.Usingit,the10forcedresponsesoftherailtotherunningelectromagneticforceareinvestigated.Besi

3、desit,FEManalysispackage,ANSYS,isusedtosimulatetheforcedresponsesoftherailtotherunningelectromagneticload.Themaximumvibrationmagnitudeerrorbetweenthecalculativevaluesandthesimulatedonesissmallerthan8.5%.Itillustratesthecalculativeresults.Theresultscan

4、beusedindesignofthedynamicsperformanceforthedrivesystem.15Keywords:railgun;dynamics;forcedresponse;electromechanicalCoupled.0IntroductionFortherailgun,themuzzlevelocitiesupto2.5km/sformassesofseveralhundredgrams[1-3]havebeendemonstratedexperimentally.

5、Therailgunincludestwoparallelcopperrailsacross20whichanarmaturemakeselectricalcontact(seeFig.1).Therailsarecopperstripsh×bandoflengthsL.Thedistancebetweenthetwocopperstripsisd.Alargecurrentpassesthroughtherailsandthearmature(projectile),andtheprojecti

6、lecurrentinteractswiththestrongmagneticfieldsgeneratedbytherailswhichproducesastrongforcetoacceleratethearmaturetogetherwiththeprojectilealongtherails.Meanwhile,amutuallyrepulsiveforceoccursbetweenthetworails.25Thedynamicbehavioroftherailgunisofgreati

7、mportanceforthesystem’sperformance.Thefirstmodelfortherailgundynamicsistotaketherailasone-dimensionalbeamonanelastic[4]foundation.Thedynamicresponseoftherailguntothemovingmagneticexitationwas[5-6]investigated.Thedynamicdisplacementsoftherailundertheru

8、nningelectromagneticforce[7]forvariousaccelerationswerestudied.Thevibrationexperimentofarailgunwithdiscrete[8]30supportswasdone.Therailsofrectangularelectromagneticrailgunwassimplifiedasadouble[9]layerelasticfoundationbeam,andthedynamicrespons