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1、钢管桁架相贯节点的相控阵检测方法研究摘要：钢管桁架是用钢管在其端部焊接而成的格子式结构，各杆件之间以相贯线型式相交，主管与支管的连接方式可呈K、T、Y相贯节点形式。钢管桁架结构截面具有良好的抗压和抗弯性能，构造简单，且不用节点板.因为它具有外形优美、结构轻、稳定性好、刚度大等特点，以及其独特的经济实用性能，钢管桁架可适用于不同形式的结构建筑.目前已广泛应用于吊车梁、屋盖结构、体育场馆、会展中心、塔架等大型建筑设施中。所以对其节点构造的焊接，以及焊接工艺和无损检测技术都有特殊的要求。超声波相控阵检测技术是一
2、种独特的超声检测技术，主要通过调节激发晶片的数量、序列、时间等参数来调整声束的偏转角度、聚焦深度等变量来实现对检测材料的覆盖，探查缺陷并生成直观可视的电子扫描图像。强大的软件控制功能可大大提高相控阵的检测效率，探头晶片排布阵列的多元化也能优化超声成像质量。相控阵检测的多扫描方式使缺陷的定位更加准确，检测数据可存储以及可动态回放分析等优点使其广泛应用于工业检测行业。关键词：超声波相控阵钢管桁架晶片偏转聚焦指导老师签名：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
