柳工liugong semi-anechoic chamber requirement v柳工半消声室需求文件

1、LiugongSemi-anechoic柳工半消声室需求文Overview 简Liugong is a multinational manufacturerof heavyconstruction LiugongSemi-anechoic柳工半消声室需求文Overview 简Liugong is a multinational manufacturerof heavyconstruction Itmanufactures full line of construction products. Liugong also is the worlds highest volume manufactu

2、rer wheelLiugong is currently heavily investing in its R&D capability. Part of this initiative improvements to the test laboratories at multiple locations. Liugong is seeking a long partnerforNVHandotherScope范isarequestforquoteforsemi-anechoicchamberLiugongwillbepurchasingthe near future.Based onthe

3、 performance tothisrequest forrs will be forfuturequotingTheseapplicationsare:Construction machinery noise performance measurement in ionary conditionsinEnginemufflerandbarriersoundinsulation发The engines and drivelines radiated noise assessment and soundEnginemufflerandbarriersoundinsulation发The eng

4、ines and drivelines radiated noise assessment and sound 发This quote is for the complete system installed at the Liugong Laboratory located in Guangxi, China. The system is expected to be “turn key” and y ready to test installation.ThetestlablayoutisasChamberoftheobjectmeasuredis15.264m(L)5.7m(W)5.7消

5、声m（H， 5.7m(W)5.7Sketch of the 试验室布局示意图（UnitDetaileddesignrequirement 设计要1NoisePerformancerequirements BackgroundNoise:lloffthenoiselevel 45dB(A)shouldbeachievedatcenteroftheDetaileddesignrequirement 设计要1NoisePerformancerequirements BackgroundNoise:lloffthenoiselevel 45dB(A)shouldbeachievedatcenterof

6、theExhaust system Noise: With Exhaust system on and other off the noise level 50dB(A)shouldbeachievedatthecenteroftheVentilationNoise:Withventilationsystemonandotheroffthenoiselevel shouldbeachievedatthecenteroftheroomatthecenterofthe2Freesoundfield Space of free he semi-anechoic room at 63Hz: Semi-

7、anechoicchamberfreeacousticfieldcharacteristics1/3octavebandnoise,accordingtoISO3745-2003measurement accuracyindicatorsare50-630Hz,Freefielddeviation2.5dB(A)800-5000Hz,Freefielddeviation2.06300Hz,Freefielddeviation3.0频带噪声，按ISO3745-2003 精度声场偏差Freefielddeviation2.5声场偏差Freefielddeviation2.06300Hz 声场偏差F

8、reefielddeviation3.0dB3Generalventilationsystem No air-conditioning system shall be provided in the room. The room temperature is downwithfreshairoutsidetheroombyroomventilationAir fresh supply for room um volume of semi-anechoic chamber: 24 m 15.5m(W)10umairflowshouldAir fresh supply for room um vo

9、lume of semi-anechoic chamber: 24 m 15.5m(W)10umairflowshouldbe37200m/hfor10timeshourofroomairVentilatorwillbelocatedonthegroundoutofthesemi-anechoicchamber.Seealsotheoflab4ExhaustgasextractionThe max engine displacement is 32L. So the exhaust gas system should be accordingum5Semi-anechoicchamberdoo

10、rs This lab will have two doors. One is for Machine in and out. 6m*6m. The other is for entrance.1m*2.1m(H).Thesedoorshavetobedoubledoor6.Chamberent There are some adapters in the wall for running fast mounting adapter (compressed hydrauliclines,connectionflangeanderface), theheentireassembly set so

11、und-absorbing board, when not used the surface acoustic constitutewhole.EachisNearthecontrolroomendwallssetalowerfigureoftemporaryerfaceconnectedthecontrollineandthenNearthecontrolroomendwallssetalowerfigureoftemporaryerfaceconnectedthecontrollineandthenIfilltheemptyspacewithsand.Thebox7Lighting Ano

12、minal average luminance of 500 lux, measured 1m above floor level. The two types circuits, houselights andtestlights will be used. Thetwocircuit system ve a feature; in case somebody (accidentally) switches all the lights off, then the house lights beput onagainstraight away. Thelightingsystem shoul

13、dalsoincludeemergency theexit 根据主体试验区域照度按GB/T13379-75（lx取 8CO/CHDetectingandAlarmingSystemCO/CH The system consists of 2sets CO detectors, 2sets CH detectors, THC detector ed soundandlight alarm. Thesystemshouldbeableto bewall-mountedcontroller mounted detectors, two programmable relays, remote cont

14、rol to adjust parameters; be able to real-time tracking site gas concentrations. The system should have a fault alarm, alarm memory, self-test, mute and other functions, can store 999 alarm records, indicating accuracy of 1%. The system should be able to be carried out with the overall linkagealarms

15、ystem,Exhaust e CO/CH-carbon monoxide detection alarm systems (CO/CH Detecting Alarming System) should be installed. Harmful hydrocarbons in engine exhaust gas houldbeinstalled2 CO 探测器、2 CH 探测器、THC 、999 linkagealarmsystem,Exhaust e CO/CH-carbon monoxide detection alarm systems (CO/CH Detecting Alarm

16、ing System) should be installed. Harmful hydrocarbons in engine exhaust gas houldbeinstalled2 CO 探测器、2 CH 探测器、THC 、999 。9.Isolatedbuildingfoundation 房隔The isolated building foundation will be designed and implemented by Liugong accordingto10.MonitoredcontrolLaboratory ystem, zoom color camera with P

17、TZ, canobservethefullrangeofanechoic chamberconditions. Monitoringsystemdoesnotthesemi-anechoicchamberfreesoundfieldcharacteristics,butdoesnotproduce11Materialsrequirements Acoustic foam and sound-absorbing metal wedge, acoustic absorption panels fill comp fire-environmentalprotection,noodor,prevent

18、iveandanti-oilpollution, sturdy andto clean, long life, and to prohibit the use of asbestos and other sound-absorbing harmtohumanhealth,sound-absorbingmaterialsshouldavoidmildewandin wet weather. Suggested acoustic absorption materials make use of pet material environmental glass wool, its demanded harmless/ easy to dry/ material stability/ long-term sound-absorbing insulation properties/ roof/ long-term ure weatheringphen