Fatigue Characteristics of Fasteners in Sections with Dense me Curves in Urban Rail Transit
Q1: Vim li cas qhov fastener qaug zog tseem ceeb dua nyob rau hauv me me nkhaus ntawm kev tsheb ciav hlau hauv nroog?
A1: Me me nkhaus vojvoog thiab loj lateral quab yuam; nquag acceleration thiab deceleration, muaj zog longitudinal cuam tshuam; siab tsheb ciav hlau ceev thiab ntau lub sij hawm cyclic load. Lub superposition ntawm ntau yam zoo heev accelerates lub fastener qaug zog ceev.
Q2: Dab tsi yog daim ntawv tseem ceeb ntawm kev tsheb ciav hlau hauv nroog tsis ua haujlwm?
A2: Feem ntau qaug zog tawg, mus tas li deformation thiab clamping quab yuam attenuation. Cov hom kev ua tsis tiav ntawm sab hauv thiab sab nrauv nkhaus clips yog sib txawv, nrog ntau eccentric tawg ntawm sab nrauv thiab pom tseeb hnav thiab loosening ntawm sab hauv.
Q3: Qhov kev puas tsuaj ntxiv dab tsi pib nquag pib- nres nres ua rau cov fasteners?
A3: Kev cuam tshuam ntev ntev ua rau lub bolt loosening, clip plam, ncoo crushing, txo qhov ntsuas ruaj khov, thiab ntau zaus retightening thiab hloov.
Q4: Vim li cas qhov hnav ceev ntawm lub nroog tsheb ciav hlau ntsuas qhov nrawm nrawm dua?
A4: Cov nkhaus me me muaj qhov loj ntawm qhov zawv zawg, lub log muaj zog- kev tsheb nqaj hlau cuam tshuam, ua ke nrog ntau cov plua plav, hnav hnyav hnyav, thinning ceev ntawm lub ntsuas ntsuas qhov chaw ua haujlwm, thiab txo qis kev txhawb nqa.
Q5: Dab tsi yuav tsum tau tsom mus rau hauv nroog rail fastener xaiv thiab tu?
A5: Xaiv cov fasteners nrog kev qaug zog, siab hnav tsis kam thiab siab sab nraud; shorten lub voj voog soj ntsuam; tsub kom qhov retightening zaus; txais yuav cov khoom siv ntxiv dag zog ua ke hauv cov ntu nkhaus.