【英文标准名称】:Acousticsandvibration-Laboratorymeasurementofvibro-acoustictransferpropertiesofresilientelements-Part4:Dynamicstiffnessofelementsotherthanresilientsupportsfortranslatorymotion
【原文标准名称】:声学和振动.弹性元件的振动-声传输特性的实验室测量.第4部分:传输运动用不包括弹性支撑的元件的动态劲度
【标准号】:ISO10846-4-2003
【标准状态】:现行
【国别】:国际
【发布日期】:2003-09
【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/TC43
【标准类型】:()
【标准水平】:()
【中文主题词】:机械性能;硬挺度;声学测量;动态的;频率;阻振器;运动的;传输;振动;传递;定义;声音衰减;声学;隔音;振动工程;测量技术;绝缘子;振动阻尼;试验;测量;可听范围;弹性元素;声音减弱;振动传递;振动隔离;结构噪音的阻尼;结构噪声;发动机消音器;实验室试验;频率范围
【英文主题词】:Acousticmeasurement;Acoustics;Dampingofstructure-bornenoise;Definitions;Dynamic;Enginesilencers;Frequencies;Frequencyranges;Insulators;Laboratorytesting;Measurement;Measuringtechniques;Mechanicalproperties;Motional;Rangeofaudibility;Resilientelements;Soundattenuation;Sounddeadening;Soundinsulation;Stiffness;Structure-bornenoise;Testing;Transfer;Transferofvibrations;Transmission;Vibration;Vibrationdampers;Vibrationdamping;Vibrationengineering;Vibrationinsulation;Vibrationalbehaviour
【摘要】:ThispartofISO10846specifiestwomethodsfordeterminingthedynamictransferstiffnessfortranslationsofresilientelementsotherthanresilientsupports.Examplesareresilientbellows,shaftcouplings,powersupplycables,hosesandpipehangers(seeFigure1).Elementsfilledwithliquids,suchasoilorwater,areexcluded.NOTE1Pipehangersareextensionallydeflected,asopposedtoelasticsupportswhicharecompressed.Therefore,thetestconditionsaredifferentfromthosedescribedinISO10846-2andISO10846-3.Themethodsareapplicabletoresilientelementswithflatflangesorflatclampinterfaces.Itisnotnecessarythattheflangesbeparallel.ResilientelementswhicharethesubjectofthispartofISO10846arethosethatareusedtoreducea)thetransmissionofaudiofrequencyvibrations(structure-bornesound,20Hzto20kHz)toastructurewhichmay,forexample,radiateunwantedsound(airborne,waterborneorother),andb)thetransmissionoflow-frequencyvibrations(typically1Hzto80Hz),whichmay,forexample,actuponhumansubjectsorcausedamagetostructuresofanysizewhenthevibrationistoosevere.Inpractice,thesizeoftheavailabletestrig(s)determinesrestrictionsforverysmallandforverylargeresilientelements.MeasurementsfortranslationsnormalandtransversetotheflangesorclampinterfacesarecoveredinthispartofISO10846.AnnexAprovidesguidanceforthemeasurementoftransferstiffnessesthatincluderotatorycomponents.Thedirectmethodcanbeappliedinthefrequencyrangefrom1Hzuptoafrequencythatisusuallydeterminedbythelowestresonancefrequencyofthetestarrangementframe(typically300Hzfortestrigswithdimensionsoftheorderof1m).NOTE2Inpractice,thelowerfrequencylimitdependsonthedynamicexcitationsystem.Theindirectmethodcoversafrequencyrangethatisdeterminedbythetestset-upandtheisolatorundertest.Therangeistypicallyfromalowerfrequencybetween20Hzand50Hz,toanupperfrequencybetween2kHzand5kHz.ThedataobtainedaccordingtothemethodsspecifiedinthispartofISO10846canbeusedfor—productinformationprovidedbymanufacturersandsuppliers,—informationduringproductdevelopment,—qualitycontrol,and—calculationofthetransferofvibrationthroughresilientelements.
【中国标准分类号】:Z32
【国际标准分类号】:17_140_01;17_160
【页数】:33P;A4
【正文语种】:英语


【英文标准名称】:StandardTestMethodsforThicknessofSolidElectricalInsulation
【原文标准名称】:固体电绝缘材料厚度的标准试验方法
【标准号】:ASTMD374-1999
【标准状态】:现行
【国别】:美国
【发布日期】:1999
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:电绝缘;试验;电缆;绝缘;厚度;塑料;柔性材料
【英文主题词】:Cables;Electricalinsulation;Flexiblematerials;Insulations;Plastics;Testing;Thickness
【摘要】:
【中国标准分类号】:K15
【国际标准分类号】:29_035_01
【页数】:11P;A4
【正文语种】:英语