Lub hauv paus ntsiab lus ntawm Fishplate Lateral Bending Stiffness thiab Track Smoothness Guarantee hauv Rail Joint Area
Vim li cas lub lateral dabtsi yog khoov nruj ntawm cov ntses daim hlau yog qhov tseem ceeb taw qhia kom ntseeg tau tias kev sib koom ua ke smoothness, tsis yog lub zog tensile?
Lub zog tensile feem ntau resists longitudinal rail nro los tiv thaiv kev sib cais sib cais, thaum lateral dabtsi yog khoov txhav resists transverse rail dabtsi yog khoov rog los tiv thaiv kev sib koom "kinking." Thaum lub tsheb ciav hlau hla kev sib koom ua ke, kev cuam tshuam lub log tsim tsis tau tsuas yog lub zog ntev, tab sis kuj yog lub sijhawm khoov uas ua rau ntsug thiab kab rov tav oscillation ntawm txoj kev tsheb ciav hlau xaus. Tsis txaus lateral dabtsi yog khoov nruj tso cai rau elastic los yog yas lateral dabtsi yog khoov ntawm cov ntses phaj, ua rau "cov kauj ruam" los yog "kinks" ntawm lub tsheb ciav hlau sib koom ua ke -qhov tseem ceeb ntawm kev sib koom ua ke tsis sib xws. Yog li, kom ntseeg tau tias lub zog tensile nkaus xwb tsis tuaj yeem daws teeb meem smoothness; nruj tswj ntawm lateral bending stiffness yog yuav tsum tau.
Dab tsi ntawm cov qauv tsim tsis muaj kev cuam tshuam zoo nrog rau sab nraub qaum tawv ntawm cov phaj ntses?
Lateral bending txhav yog qhov zoo sib xws nrog peb qhov tseem ceeb: 1)phaj thickness-stiffness yog proportional rau lub voos xwmfab ntawm thickness, nrog ib tug 1 hli boosting txhav los ntawm ntau tshaj 30%; 2)ntu ntu ntawm inertia- txuas ntxiv lub taub hau kev tsheb ciav hlau / lub hauv paus qhov ntev los yog siv qhov "I" zoo li tus ntoo khaub lig-section ua kom muaj zog ntxiv; 3)khoom elastic modulus-siv siab- lub zog alloy steel (xws li, 42CrMo) es tsis txhob ntawm cov pa roj carbon zoo tib yam txhim kho cov khoom deformation kuj. Tsim kom muaj qhov ntsuas qhov ntsuas no kom tsis txhob hnyav dhau los ntawm cov phaj tuab heev.
Cov kab mob tshwj xeeb dab tsi ua rau ntses daim hlau uas tsis txaus lateral dabtsi yog khoov txhav ua rau cov pob qij txha txuas ntxiv welded rail (CWR)?
CWR pob qij txha (piv txwv li, expansion pob qij txha) ua rau muaj kev ntxhov siab loj heev; ntses daim hlau nrog tsis txaus lateral dabtsi yog khoov txhav yuav tsis zoo txwv rail thermal deformation. Ua ntej, nws ua rauruaj khov lateral hard dabtsi yog khoovntawm rails hauv cheeb tsam sib koom ua ke nyob rau hauv qhov kub thiab txias zog. Thib ob, kev khoov nyuaj ua rau muaj qhov hloov pauv hloov pauv hauv lub sijhawm taug qab geometry ntawm thaj chaw sib koom ua ke, ua raurail corrugation. Qhov tseem ceeb tshaj plaws, cov ntsiab lus nyuaj khoov dhau los ua qhov chaw muaj kev ntxhov siab thermal, ua rau muaj kev cuam tshuam kev tsheb ciav hlau tawg thaum lub caij txias thiab cuam tshuam tag nrho cov kev ntxhov siab ntawm CWR.
Dab tsi yog qhov sib txawv hauv kev sim rau ntses phaj lateral dabtsi yog khoov nruj ntawm Suav thiab thoob ntiaj teb cov qauv?
Suav cov qauv txais yuavpeb-point dabtsi yog khoov xeem- kho cov ntses phaj ntawm txoj kev tsheb ciav hlau- simulating kev txhawb nqa, siv kev thauj khoom hla ntawm lub phaj nruab nrab, thiab ntsuas lub nra ntawm qhov chaw deflection los txiav txim siab qhov tsim nyog nruj. Cov qauv thoob ntiaj teb zoo li EN 13674-1 siv covplaub-point dabtsi yog khoov xeem, nrog rau kev thauj khoom siv ntawm ob lub qhov ntsia hlau, ntau dua simulating hauv -kev pabcuam kev ntxhov siab. Tsis tas li ntawd, cov qauv thoob ntiaj teb xav tau acyclic loading xeem-tom qab 1 lab alternating load cycles, lub lateral bending stiffness attenuation rate yuav tsum tsis pub tshaj 5%, qhov yuav tsum tau hais tsis meej nyob rau hauv Suav cov qauv rau post- qaug zog txhav.
Yuav ua li cas thim rov qab txiav txim tsis txaus lateral dabtsi yog khoov nruj ntawm cov ntses daim hlau ntawm -cov ntaub ntawv soj ntsuam geometry site?
Cov txheej txheem tseem ceeb yog kev txheeb xyuasrail alignment thiab longitudinal theem deviation cov ntaub ntawv in the joint zone. Using a track inspection car, if "sharp-angled" sudden changes in rail alignment deviation (peak >2mm) raug kuaj pom nyob rau hauv 3m ua ntej thiab tom qab kev sib koom ua ke, thiab cov kev hloov no tseem nyob hauv ntau qhov kev tshuaj xyuas yam tsis tau ploj mus nyob rau hauv lub tsheb ciav hlau dov, tsis txaus ntses phaj lateral dabtsi yog khoov txhav tuaj yeem txiav txim siab. Tsis tas li ntawd, kev soj ntsuambolt qhov deformationnyob rau hauv cheeb tsam sib koom ua ke -elliptical transverse o ntawm lub qhov ntsia liaj qhov rooj qhia rov qab khoov ntawm cov ntses phaj nyob rau hauv transverse rog, ua rau shear deformation ntawm lub qhov thiab ua raws li cov pov thawj ncaj qha ntawm tsis txaus lateral dabtsi yog khoov nruj.