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1、鋼管桁架相貫節(jié)點(diǎn)的相控陣檢測(cè)方法研究摘要：鋼管桁架是用鋼管在其端部焊接而成的格子式結(jié)構(gòu)，各桿件之間以相貫線型式相交，主管與支管的連接方式可呈K、T、Y相貫節(jié)點(diǎn)形式。鋼管桁架結(jié)構(gòu)截面具有良好的抗壓和抗彎性能，構(gòu)造簡(jiǎn)單，且不用節(jié)點(diǎn)板.因?yàn)樗哂型庑蝺?yōu)美、結(jié)構(gòu)輕、穩(wěn)定性好、剛度大等特點(diǎn)，以及其獨(dú)特的經(jīng)濟(jì)實(shí)用性能，鋼管桁架可適用于不同形式的結(jié)構(gòu)建筑.目前已廣泛應(yīng)用于吊車梁、屋蓋結(jié)構(gòu)、體育場(chǎng)館、會(huì)展中心、塔架等大型建筑設(shè)施中。所以對(duì)其節(jié)點(diǎn)構(gòu)造的焊接，以及焊接工藝和無(wú)損檢測(cè)技術(shù)都有特殊的要求。超聲波相控陣檢測(cè)技術(shù)是一
2、種獨(dú)特的超聲檢測(cè)技術(shù)，主要通過(guò)調(diào)節(jié)激發(fā)晶片的數(shù)量、序列、時(shí)間等參數(shù)來(lái)調(diào)整聲束的偏轉(zhuǎn)角度、聚焦深度等變量來(lái)實(shí)現(xiàn)對(duì)檢測(cè)材料的覆蓋，探查缺陷并生成直觀可視的電子掃描圖像。強(qiáng)大的軟件控制功能可大大提高相控陣的檢測(cè)效率，探頭晶片排布陣列的多元化也能優(yōu)化超聲成像質(zhì)量。相控陣檢測(cè)的多掃描方式使缺陷的定位更加準(zhǔn)確，檢測(cè)數(shù)據(jù)可存儲(chǔ)以及可動(dòng)態(tài)回放分析等優(yōu)點(diǎn)使其廣泛應(yīng)用于工業(yè)檢測(cè)行業(yè)。關(guān)鍵詞：超聲波相控陣鋼管桁架晶片偏轉(zhuǎn)聚焦指導(dǎo)老師簽名：Researchphasedarraydetectionsteeltrusswithnod
3、esStudentname:LiJinchengClass:11081311Supervisor:ZhangWeiAbstract:Steelpipetrussispipeattheendoftheweldingandthegridtypestructure,amongthemembersintubularlinearintersect,The?connection?ofmainandbranch?was?K,?T,?Y?tubularjoints?form.?Sectionofthesteelpipet
4、russstructurehasgoodcompressiveandflexuralperformance,simplestructureandnonodeplate.Becauseithasthecharacteristicsofbeautifulappearance,lightstructure,goodstability,stiffnessoflarge,andtheuniqueeconomicalandpracticalperformance,thesteeltubetrusscanbeappli
5、cabletodifferentformsofarchitecture.Currently,ithasbeenwidelyappliedincranebeam,roofstructure,thestadiums,conventionandExhibitionCenter,thetoweroflargebuildingfacilities.So?the?joint?welding,?andweldingtechnology?and?nondestructivetestingtechnology?havesp
6、ecialrequirements.Phasedarrayultrasonictestingtechnologyisauniqueultrasonicdetectiontechnology,mainlythroughtheexcitationchipnumber,sequence,timeandotherparameterstoadjustthesoundbeamdeflectionangle,depthoffocusandothervariablestoachieveformaterialinspect
7、ioncoverage,probingthedefectsandgenerateanintuitivevisualelectronicscanningimage.Softwareisapowerfulcontrolfunctionscangreatlyimprovethedetectionefficiencyofaphasedarray,diversificationofwaferprobearrayscanalsooptimizationofultrasoundimagingquality.?Phase
8、darrayinspectionofmultiscanmodetolocatedefectsmoreaccurately,datadetectioncanstoredanddynamicreplayanalysisadvantagesmakeitwidelyusedinindustrialinspectionindustry.Keywords:Ultrasonic?phasedarraysteelpipetruss?wafer
