某型号仪器舱组合体联合动强度试验方法张群，马丽然Δ，代振梦，沈兴，卫国（北京强度环境研究所，北京100076）摘要：针对某型号导弹仪器舱组合体结构和设备的联合动强度考核需求，开展组合体的动强度试验方法研究：设计专门的气瓶过载弹性加载装置，实现了气瓶过载力的等效模拟；通过整舱振动试验边界模拟和传递特性分析，验证了噪声激励振动传递与机械振动传递的差异性，提出采用大刚度模拟边界代替级间段真实边界与仪器舱组合进行联合动强度试验的方法；针对3个重点结构部段提出各自的试验条件，并通过预试验和归一化输入响应的比较分析确定了舱段不同部位结构和设备的联合考核方法。该试验方法可以有效模拟由发动机脉动和气动噪声引起的声振环境，避免产品过试验，达到对舱段结构及设备的动强度考核和设备支架动特性及放大倍数评估的目的。关键词：仪器舱组合体；动强度试验；声振环境；边界模拟；传递特性中图分类号：V416.2文献标志码：A文章编号：1673-1379(2023)01-0037-06DOI:10.12126/see.2022095MethodforcombineddynamicstrengthtestofanintegralinstrumentcabinassemblyZHANGQun,MALiranΔ,DAIZhenmeng,SHENXing,WEIGuo(BeijingInstituteofStructureandEnvironmentEngineering,Beijing100076,China)Abstract:Inviewofthedemandsofthecombineddynamicstrengthassessmentofamissileinstrumentcabinassembly’sstructuresandequipment,anintegralcabinassembly’sdynamicstrengthtestmethodwasstudied.Aspecialelasticloadingdeviceforoverloadofthegascylinderwasdesignedandtheequivalentsimulationofcylinderoverloadwasrealized.Throughthewholecabinvibrationtestboundarysimulationandtransfercharacteristicsanalysis,thedifferencebetweennoiseexcitationvibrationtransferandmechanicalvibrationtransferwasverified.Largestiffnesssimulationboundary,insteadoftherealboundaryofinter-stage,wasusedtocombinewiththeinstrumentcabinforcombineddynamicstrengthtest.Thetestconditionsofthethreekeystructuralpartswereproposed,andthecombinedassessmentmethodsofthestructureandequipmentindifferentpartsofthecabinweredeterminedbycomparingthepreliminarytestandthenormalizedinputresponse.Thistestmethodcouldeffectivelysimulatetheacousticvibrationenvironmentcausedbyenginepulsationandaerodynamicnoisetoavoidpro...
