工作狀態(tài)下自立式平臂塔吊動(dòng)力特性現(xiàn)場(chǎng)實(shí)測(cè)及影響因素分析

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關(guān)鍵詞：平臂塔吊；動(dòng)力特性；現(xiàn)場(chǎng)實(shí)測(cè)；正交試驗(yàn)；有限元模型修正 中圖分類(lèi)號(hào)：TU311.3；TH213.3 文獻(xiàn)標(biāo)志碼：A DOI：10.16385/j.cnki.issn.1004-4523.202312006

Field test and analysis of influence factors on the dynamic characteristics of self-supporting flat arm tower crane under multiple working conditions

ZHANG Qinghua’，WANG Zhihao1，YANGHui2，ZHAO Jinming2，XU Yanwei1 （1.Schoolof CivilEngineering and Transportation，North China Universityof WaterResourcesandElectricPower， Zhengzhou 450045，China；2.China Construction Third Engineering Bureau Group Co.，Ltd.，，Wuhan 43O064，China）

Abstract：Inordertoobtainmoreacurateandrefineddynamiccharacteristicsoftheflatboomtowercrane，thfieldtestofthedy namicresponseofthetypicalfrestandingflatboomtowercranewascariedoutconsideringtheinfluenceofliftingpositions，lifting heights（ropelengths）andliting weights.Thetestresultsshowthatthevibrationalongtheboomaxialdirectionandverticaldirectionhasgoodsychronzation.However，theresponsecorrelationbetweenthehorizontaldirectionoftheverticalboomandtheai alandverticaldirectionofthetowercraneboomisrelativelylow.Thenaturalfrequenciesidentifiedbythehalf-powerbandwidth methodandtheSSI-COVmethodarebasicallythesame，withthediferenceoflifting positions，ropelengthsandliftingweights， thenaturalfrequenciesofflatboomtowercranewillfuctuatearoundthenaturalfrequencyundernoload.Therearesomediferenc esinthedentificationresultsofthedampingratiobetweenthetwometods，inmostworkingconditions，thedampingratioidenti fied bythe SSI-COVmethodissmaller than thatidentifiedbythehalfpowerbandwidth method.Basedonorthogonal testanaly sis，the influenceoftheabovefactorsonthe naturalfrequencyanddampingratioof thetowercraneisnotsignificant，and there is no maineffect.Inaddition，thefiniteelementmodeloftheflatarmtowercraneisoptimized，andthefrequencyoftheupdatedmodelis ngoodagreementwiththetestresults.Theboomvibrationmodefunctionunderno-loadconditionwasfted，theamplitude distributionalong theboomlengthexhibitsanapproximatelylinear，however，whentheliftingweightappearsattheendorrotof the boom，the boom vibration mode may show an obvious nonliner characteristics.

Keywords： flatarm tower crane;dynamic characteristics;field test;orthogonal test;finite element model updating

塔吊是工程施工中重要的起重設(shè)備，廣泛應(yīng)用于城市高層建筑、橋梁、港口、水利和電力建設(shè)工程等眾多領(lǐng)域。（剩余13954字）