【英文标准名称】:Bolt,bihexagonalhead,neckedshank.ISOthread:4Hclass,finepitch.
【原文标准名称】:带颈杆十二角头螺栓.ISO螺纹.细牙4H级
【标准号】:NFL22-243-1987
【标准状态】:现行
【国别】:法国
【发布日期】:1987-11-01
【实施或试行日期】:1987-11-05
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:V20
【国际标准分类号】:49_030_20
【页数】:4P;A4
【正文语种】:其他


【英文标准名称】:Mechanicalvibrationandshock-Characterizationofthedynamicmechanicalpropertiesofvisco-elasticmaterials-Part2:Resonancemethod
【原文标准名称】:机械振动和冲击.粘弹性材料的动态机械特性的表征.第2部分:共振法
【标准号】:ISO18437-2-2005
【标准状态】:现行
【国别】:国际
【发布日期】:2005-04
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC108
【标准类型】:()
【标准水平】:()
【中文主题词】:振动;规范(验收);振动影响(对人体);振动影响;振动测量;测量;试验;材料的机械性能;冲击;抗震试验;弹性(流体);共振法;定义
【英文主题词】:Definition;Definitions;Elasticproperties(fluids);Measurement;Mechanicalpropertiesofmaterials;Resonancemethods;Shock;Specification(approval);Testing;Vibration;Vibrationeffects;Vibrationeffects(humanbody);Vibrationmeasurement;Vibrationresistancetests
【摘要】:ThispartofISO18437definesaresonancemethodfordeterminingfromlaboratory,measurementsthedynamicmechanicalpropertiesoftheresilientmaterialsusedinvibrationisolators.Itisapplicabletoshockandvibrationsystemsoperatingfromafractionofahertztoabout20kHz.ThispartofISO18437isapplicabletoresilientmaterialsthatareusedinvibrationisolatorsinordertoreducea)transmissionsofunwantedvibrationsfrommachines,structuresorvehiclesthatradiatesound(fluid-borne,airborne,structure-borne,orothers),andb)thetransmissionoflow-frequencyvibrationsthatactuponhumansorcausedamagetostructuresorsensitiveequipmentwhenthevibrationistoosevere.ThedataobtainedwiththemeasurementmethodsthatareoutlinedinthispartofISO18437andfurtherdetailedinISO18437-3areusedfor—thedesignofefficientvibrationisolators,—theselectionofanoptimummaterialforagivendesign,—thetheoreticalcomputationofthetransferofvibrationsthroughisolators,—informationduringproductdevelopment,—productinformationprovidedbymanufacturersandsuppliers,and—qualitycontrol.Theconditionforthevalidityofthemeasurementmethodislinearityofthevibrationalbehaviouroftheisolator.Thisincludeselasticelementswithnonlinearstaticloaddeflectioncharacteristics,providedthattheelementsshowapproximatelinearityintheirvibrationalbehaviourforagivenstaticpreload.Measurementsusingthismethodaremadeoveroneortwodecadesinfrequencyatanumberoftemperatures.Byapplyingthetime-temperaturesuperpositionprinciple,themeasureddataareshiftedtogeneratedynamicmechanicalpropertiesoveramuchwiderrangeoffrequencies(typically10to10Hzatasinglereferencetemperature)thaninitiallymeasuredatagiventemperature.NOTEForthepurposesofthispartofISO18437,theterm"dynamicmechanicalproperties"referstothedeterminationofthefundamentalelasticproperties,e.g.thecomplexYoung'smodulusasafunctionoftemperatureandfrequencyand,ifapplicable,astaticpreload.
【中国标准分类号】:J04
【国际标准分类号】:17_160
【页数】:15P.;A4
【正文语种】:英语