Tsheb sib tsoo kev ua tau zoo

Vim hais tias lub expansion tube muaj ib tug ruaj khov zog nqus cov nyhuv, nws tau siv nyob rau hauv kev sib tsoo waveform generators nyob rau hauv Tuam Tshoj. Piv txwv li, Lub Tsev Haujlwm Saib Xyuas Kev Nyab Xeeb thiab Lub Zog Txuag Hluav Taws Xob ntawm Tsinghua University siv nws kom tau txais qhov kev txo qis uas yuav tsum tau muaj nyob rau hauv European txoj cai ECE R80. Shanghai Guanchi Lub tuam txhab kev nyab xeeb tsheb tau siv lub raj txuas ntxiv mus rau lub tshuab hluav taws xob waveform ntawm lub trolley test, thiab Yang Hui thiab lwm tus los ntawm Shanghai Motor Vehicle Inspection Center siv nws los ua lub zog nqus cov khoom ntawm lub hauv ntej kawg ntawm lub tsheb lub teeb. Qhov tseeb, lub raj xa dej tuaj yeem tsis tsuas yog siv los ua lub tshuab hluav taws xob waveform thiab lub zog nqus cov khoom ntawm lub hauv ntej kawg ntawm lub teeb tsheb, tab sis kuj tseem tuaj yeem siv ncaj qha rau cov khoom siv tiv thaiv tom qab ntawm lub tsheb thauj khoom kom nqus lub zog sib tsoo thiab txo qis. tsheb lub cev deceleration.
3.1 Cov qauv tsim ntawm expansion tube rear tiv thaiv ntaus ntawv
Txij li cov punch thiab lub raj nthuav dav tsis yog 100% axially stressed, txhawm rau tiv thaiv cov punch thiab cov raj nthuav dav los ntawm cov txheeb ze bending deformation thaum lub sij hawm sib tsoo lub zog nqus cov txheej txheem, lub casing yog ntxiv rau sab nraum lub raj txuas. Cov cuab yeej tiv thaiv nraub qaum hla kab thiab sab nraub qaum tiv thaiv tau raug kho. Lub punch yog muab tso rau hauv qhov qhib ntawm lub raj nthuav dav. Lub uprights ntawm lub rear tiv thaiv ntaus ntawv thiab lub longitudinal kab teeb ntawm lub tsheb, nruab nrab ntawm lub casing thiab lub longitudinal kab teeb, thiab nruab nrab ntawm cov punch thiab txhua txhua txuas nrog rotating hinges los xyuas kom meej kev tiv thaiv rear. Kev sib hloov dawb ntawm lub cuab yeej.
Thaum lub tsheb tsoo lub cuab yeej tiv thaiv tom qab, nws thawj zaug tsoo tus ntoo khaub lig beam ntawm cov khoom tiv thaiv, thiab tom qab ntawd tus ntoo khaub lig beam thawb lub punch txuas rau nws kom nthuav dav lub raj txuas. Thaum lub sij hawm expansion txheej txheem, lub expansion raj absorbs ib tug loj npaum li cas ntawm kev sib tsoo zog thiab nws yields. Lub zog yog 400 MPa, 235 MPa, thiab 386 MPa raws, thiab cov thicknesses yog 10 hli, 4 hli, thiab 7 hli feem. Ntawm lawv, lub expansion tube muaj thawj thiab theem nrab expansion tubes. Thawj lub raj nthuav dav yog ib feem nrog txoj kab uas hla ntawm 60 hli, thiab lub raj txuas ntxiv yog ib feem nrog txoj kab uas hla ntawm 52 hli.
3.2 Regulatory verification ntawm expansion tube rear tiv thaiv ntaus ntawv
Cov cuab yeej tiv thaiv yog ua raws li kev tswj xyuas kev tswj xyuas raws li qhov yuav tsum tau ua ntawm kev xeem dynamic ntawm GB11567.2-2001 tus qauv. Tus naj npawb ntawm cov qauv nodes yog 67195, tus naj npawb ntawm cov units yog 61096, thiab tag nrho cov loj ntawm lub rear tiv thaiv ntaus ntawv yog 96.38 kg. Qhov siab tshaj plaws kev nkag mus ntawm mobile barrier yog 156 mm, uas yog tsawg tshaj li 400 mm teev nyob rau hauv cov kev cai; lub rebound ceev ntawm lub mobile barrier tom qab kev sib tsoo yog 1.1 m / s, uas yog tsawg tshaj li 2m / s teev nyob rau hauv cov kev cai; lub deceleration ntawm lub mobile barrier yog qhov siab tshaj plaws Tus nqi yog 27.3 g, uas yog tsawg tshaj li 40 g yuav tsum tau los ntawm cov kev cai, yog li ntawd lub rear tiv thaiv ntaus ntawv raws li lub teb chaws tus txheej txheem. Tsis tas li ntawd, nws tuaj yeem pom tau tias qhov deceleration ntawm txav barrier thaum lub sij hawm sib tsoo me me thiab cov mem tes dav yog loj, qhia tau hais tias lub expansion tube rear tiv thaiv ntaus ntawv muaj ib tug zoo zog nqus cov nyhuv.