斜拉索-阻尼器系統(tǒng)在風荷載作用下的有限元分析.pdf

1、河北工業(yè)大學碩士學位論文斜拉索阻尼器系統(tǒng)在風荷載作用下的有限元分析姓名：李靜申請學位級別：碩士專業(yè)：巖土工程指導教師：徐東強201012斜拉索阻尼器系統(tǒng)在風荷載作用下的有限元分析FINITEELEMENTANALYSISONCABLEDAMPERSYSTEMUNDERWINDLOADABSTRACTInrecentyearscablestayedbridgehasbeenrapiddevelopmentbecomethefastestg

2、rowingmodernbridgeengineeringthemostcompetitiveoneofthebridgeinthewldwithitsbeautifulshapelargespanningcapacityreasonablestructuregoodmechanicalpropertiesrelativelyeconomicalcost.Atthesametimewiththesubstantialgrowthinca

3、blestayedspanalsowillincreasethelengthofcablethevibrationproblemhasbecomemeprominent.Flargespancablestayedbridgethevibrationcontrolofstaycableshasbecomethefirstoneofthekeyissuestobesolvedincablestayedbridgeconstruction.S

4、ofarintheactualprojectpassivecablevibrationdampersisthemostwidelyusedtocontrolvibration.ThispaperfocusesonthedampingacteristicsofcabledampersystemwereanalyzedThefollowingaspectsarethemajresearch:1.Describesthedevelopment

5、ofcablestayedbridgeproblemscausedbycablevibrationitsvibrationmechanismmainlydiscussedthecabledampersystemtheymodelthetheyofvibrationequation.2.Thenaturalpropertiesoffluetuatingwindfieldsisdepieted.BasedonthefmulationofCA

6、WS(ConstantAmplitudeWaveSuperposition)Compiledthewindfieldsimulationprogramrealizedstaycablesfluctuatingwindfieldeffectivelymodelobtainedthewindvelocitytimehistycurveofstaycablesbasedonthisobtainedthewindfcethetimehistyc

7、urveofstaycables.3.UsingANSYSlargefiniteelementsoftwarefthecabledampersystemthesingle(double)cabledamperbeamcombinationsystemissimulatedthemodalanalysiswereobtainedthenaturalfrequencyofthesystemwereobtainedrespectivelywh

8、enthedamperindifferentpositionthroughtocabledampersystemtimehistyanalysiscomparingthepositiondisplacementofadditionaldampertheimpactofthecablesdampingpropertiescablevibrationattenuationwhenthedampingcoefficientchangethec

9、abledampervibrationattenuationwasanalyzedcomparedtheadditionaldampereffecttotheinfluenceofvibrationreductionanalysisofthebeamfanadditionaldampereffect.Throughtheaboveanalysisonthedamperdampingchangesatdifferentpositionsu

10、nderthewindload，studiedcablesdampersystemofvibrationreductiondiscussedtheimpactofanadditionaldamperonthecablevibrationeffectsofthefacts.KEYWDS:vibrationmitigationofstaycabledamperfluetuatingwindfieldDampingcoefficientvib