端撑对220kV变电构架的静动力响应影响分析

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1、万方数据STATICANDDYNAMICRESPONSEOFENDSURPPORTON220kVSUBSTATIONFRAMEABSTRACTSubstationframeisanindispensablestructuretoensurethesafetyoftransmissionline．Frameswithnoendsupportcanbeadoptedwhentheframeonlyhasafewspans．Consideringlargerlateralforce，frameswithendsupportisabette

2、rschemewhentheflamehasconsiderablespans．Undernormalcircumstance，insufficientstructuralstiffnessisthemajorflawofsubstationscheme，whichmeansdisplacementfailstomeettherequirement．Underearthquake，thesubstationframemaycollapsesuccessivelyandbecomeinstableasawhole，whichresul

3、tsinhugeeconomiclossandunfavorablesocialinfluence．IncorporatingendsupportCansignificantlyimprovethestiffnessandstrengthoftheflame，consequentlythestaticanddynamicresponseofthesubstationstructure．However,relatedresearcheshaverarelydoneSOfar．Thus，basedon220kVsubstationfla

4、me．theauthorhasconductedsomestudiesandproposesafewsuggestionsondesigningandoptimizingsubstationframe．Thekeypointsofthestudyareasfollows：Firstly，theauthorstudiestheinfluenceofendsupportonthestaticresponseofthesubstationframewasgivenatfirst．T11eresultsshowthatincorporati

5、ngendsupportcansignificantlyreducethemaximummoment，displacementandrotationofthemitercolumn．EventhoughtheinfluenceoftransversebraceonthedisplacementofstructuresiSnotobvious，itCanreducethemaximumbendingmomentofthebottomofmitercolumnby50％．n圮spanlengthhasagreatinfluenceons

6、tructuraldisplacementandrotationresponse．Secondly,theauthorgiventheinfluenceofendsupportonthedynamicresponseofthesubstationframe．Theresultsshowthatone-sidebraceCanⅡ万方数据improvethestructuralstiffnessbyabout16times，however,structuralstiffnesshaslittlespacetogrowwhenthebra

7、ceisarrangedontheotherside．Intheend，theauthorresearchedontheseismicresponseofendsupportunderfrequentearthquakeandrareearthquakerespectively．Theresultsshowthat，withnoendsupport，structureaccelerationandshearforceresponseisattheleastlevelwhileearthquakedisplacementreactio

8、nisgreat．Structurewithsinglebracecanreduceatleast80％ofdisplacementwhiletheaccelerationresponseisobvious．Thedisplaceme