旋轉(zhuǎn)超聲電機定子超諧共振分析與非線性動力學實驗.pdf

1、天津大學碩士學位論文旋轉(zhuǎn)超聲電機定子超諧共振分析與非線性動力學實驗姓名：李守曉申請學位級別：碩士專業(yè)：一般力學與力學基礎指導教師：曹樹謙20090601ABSTRACTUltrasonicmotorisanewdevelopedmini—motorinrecentdecadesTheUSMconvertsapiezoelectricallyexcitedresonantvibrationofthestatorintoamovemento

2、ftherotorbyfrictionalforcesBecauseitishighlyaffectedbythenonlinearfeatures，itisvaluabletostudythenonlinearfeaturesInthispaperthemethodofmultiplescalesWaSusedtoinvestigatethesuperharmonicresonanceofthenonlineardynamicmode

3、lofstandingwavevibrationofstatorwhichwasestablishedinconsideringthequadraticnonlinearconstitutiverelationsofpiezoelectricmaterials，andthenitwasusedtoinvestigatethesuperharmonicresonanceoftheoneofconsideringtheelastichyst

4、eresisThepiezoelectriccantilevermodelisdesignedandtheexperimentsystemisbuildedandthenonlinearexperimentwithitisdoneFinallytheexperimentresultsfromwhichwegetthenonlinearphenomenonarediscussedindetailsThecontentsaresummari

5、zedasfollows：Thefeature，backgroundandapplyoftheUSMareintroduced，andthenonlinearphenomenonandexperimentprocedureabouttheUSMarediscussedThemethodofmultiplescaleswasusedtoinvestigatethesuperharmonicresonanceofthenonlineardy

6、namicmodelofstandingwavevibrationofstatorThepiezoelectriccantilevermodelaredesigned，thenitiscalculatedonwithSAMCEFNonlineardynamicexperimentsarecarriedoutonthedesignedsystemThedatawhichindicatesthenonlinearphenomenonisan