電網(wǎng)沖擊下汽輪發(fā)電機組軸系扭振響應分析

1、華北電力大學（保定）碩士學位論文電網(wǎng)沖擊下汽輪發(fā)電機組軸系扭振響應分析姓名：陳秀娟申請學位級別：碩士專業(yè)：機械工程機械電子工程指導教師：唐貴基向玲201103華北電力大學碩士學位論文IIAbstractWiththedevelopmentofelectricpowertheproblemofshaftTsionalVibrationonturbinegeneratshasdrawnbroadattention.Powersystemfa

2、ultoperatingmodechangesmayhaveagreaterimpactonthepowerwk.Theseconditionsmayresultinshafttsionalvibration.Soitisgreatlypracticalsignificantfsafestableoperationunitstoanalyzetheresponseacteristicsoftsionalvibrationwithpowe

3、rwkimpact.TakinganexampleoftsionalvibrationsimulatonDongFang300MWturbinegeneratsthemultispringmassmodelofwhoseshaftisestablished.ThentheinherentacteristicsofshafttsionalvibraionarecalculatedbyalgithmofimprovedRiccatitrad

4、itionalmatrixbythatofHolzer.Thesetesultsareconsistentwiththetestresults.AnewmethodofRiccatitraditionalmatrixcombinedwithNewmarkβincrementalmethodisputfwardtosolvingshaftresponseofnonlineartsionalvibrationsystem.Buttherew

5、illbealinearsupposeinthetimestepwhenusingthismethodamethodisproposedtoeliminatecumulateerrfromthissuppose.Thenanothermodelfresponseoftsionalvibrationisestablished.Onthismodeltheresponseacteristicsofshafttsionalvibrationa

6、recalculatedanalyzedunderseveraltypicalimpactsofpowerwk.Thuswecanconcludethatfromthispapertheresponseacteristicscanbedescribedasfollowing:alltheseimpactscanstimulateinherentfrequenciesondifferentdegreesfthewholeshaftther

7、esponsesoflowpressurecylinderrotofgeneratrotarestrongerespeciallyofgeneratrotthesamesectionofshafthavedifferentresponsetodifferentimpactssowecannotsimplytodeterminewhichimpactswillcauseastrongerresponseshouldanalyzeprobl

8、emsdependingontheactualsituation.Tionalelectromechanicalsystemsiscomposedofmechanic、electricwk.SubmodelsofeverypartareintroducedinthispaperthentheModelunifiedelectricmechanicissetup.OntheEMTPRV(whichisanelectromagictrans

9、ientsimulationsoftware)thetypicalpowerwkimpactsaresimulatedtheresponseofshafttsionalvibrationaregainedagain.Theresponseresultsareconsistentwithaboveresultsusedthenewmethod.Itprovidesareferenceffurtherresearchontheactualu