Elastic Modulus ntawm Rail Pads thiab Track Vibration Damping Adaptation
Yuav ua li cas yog lub hauv paus tsim rau lub elastic modulus nyob rau hauv -rail puag daim hlau?
Kev tsim qauv ntawm cov qauv elastic ntawm hauv qab - cov phiaj xwm kev tsheb ciav hlau yuav tsum tau ua ke nrog cov kab hom, cov qib thauj khoom thiab kev poob siab xav tau, nrog rau qhov tseeb thiab ntau haiv neeg. Rau cov pa ceev railways nrog ib tug ceev Tsawg tshaj los yog sib npaug zos rau 160km / h thiab qag load Tsawg tshaj los yog sib npaug zos rau 21t, qhov kev thov poob siab yog nruab nrab, yog li lub elastic modulus ntawm roj hmab puag daim hlau yog tsim los ua 80-100MPa, ntsuas cov kabmob muaj peev xwm thiab kev poob siab yooj yim. Rau siab - txoj kev tsheb ciav hlau ceev nrog qhov ceev Ntau dua lossis sib npaug li 250 km / h thiab lub log siab - kev tsheb ciav hlau cuam tshuam zaus, yuav tsum muaj lub siab elastic modulus los xyuas kom meej kev ruaj ntseg. Lub modulus ntawm polyurethane puag daim hlau yog teem rau 120-150MPa, thiab poob siab absorbing yog zoo dua los ntawm cov mis optimization. Rau hnyav- kev tsheb ciav hlau nrog lub qag load Ntau dua lossis sib npaug li 25t thiab qhov cuam tshuam loj, lub hauv paus phaj xav tau cov kabmob muaj zog, yog li lub elastic modulus yuav tsum siab dua lossis sib npaug rau 100MPa, thiab cov modulus attenuation nyob rau hauv load yuav tsum tsawg dua los yog sib npaug li 5%. Kev tsheb ciav hlau hauv nroog muaj qhov xav tau siab rau kev tswj lub suab nrov, yog li xav tau cov phaj qis-modulus, nrog elastic modulus tswj ntawm 60-80MPa txhawm rau ntxiv dag zog rau qis zaus kev co. Tsis tas li ntawd, nws yog ib qho tsim nyog yuav tau hloov kho raws li hom pw tsaug zog, thiab qhov sib txawv ntawm qhov sib txawv ntawm ballastless track base plates tsawg dua los yog sib npaug rau ± 5% kom ntseeg tau tias kev ruaj ntseg ntawm kev taug qab geometry.
Dab tsi zoo dua polyurethane puag phaj muaj tshaj roj hmab puag phaj hauv elastic modulus stability?
Polyurethane puag daim hlau yog qhov zoo tshaj rau cov roj hmab hauv paus phaj hauv elastic modulus stability, yoog mus rau qhov ntev - lub sijhawm ua haujlwm xav tau ntawm cov kab siab - qib. Lub elastic modulus ntawm polyurethane puag daim hlau hloov tsawg dua los yog sib npaug li 5% nyob rau hauv ib puag ncig ntawm -40℃mus rau 80 degree, thaum lub modulus fluctuation ntawm roj hmab puag daim hlau nyob rau hauv qhov kub thiab tsis kub ib puag ncig muaj peev xwm ncav cuag 15%, uas yog ib qho yooj yim rau harden nyob rau hauv qis kub thiab soften ntawm high kub. Nyob rau hauv ntev - lub sij hawm cyclic loads, lub modulus attenuation ntawm polyurethane puag daim hlau tom qab 1 lab loads tsawg tshaj li los yog sib npaug li 3%, thaum cov roj hmab puag daim hlau yog ntau dua los yog sib npaug li 8%, uas muaj peev xwm tuav ruaj khov poob siab absorbing kev ua tau zoo rau lub sij hawm ntev. Kev tiv thaiv- kev laus ntawm cov khoom siv polyurethane zoo dua; Tom qab 3000 teev ntawm kev ntsuas huab cua tiv thaiv, qhov hloov pauv hloov tsawg dua lossis sib npaug li 4%, thaum cov roj hmab hauv paus daim hlau yuav muaj kev poob qis hauv modulus vim kev laus. Tsis tas li ntawd, polyurethane puag daim hlau muaj zog ua rau qaug zog thiab tsis yooj yim rau deformation mus tas li nyob rau hauv siab - zaus vibration, thaum cov roj hmab hauv paus daim hlau yog nquag mus compression mus tas li deformation tom qab ntev - siv sij hawm, ua rau modulus tsis ua hauj lwm. Qhov kom zoo dua no ua rau polyurethane puag daim hlau yog thawj qhov kev xaiv rau siab - kev tsheb ciav hlau ceev thiab hnyav - cov kab tsheb, ua kom cov kev ua haujlwm ntev ntawm cov kab poob siab.
Yog vim li cas tsis muaj elastic modulus nyob rau hauv -rail base daim hlau nyiam rau hauv nroog rail transit kab?
Cov xwm txheej ua haujlwm thiab cov kev xav tau ntawm kev tsheb ciav hlau hauv nroog txiav txim siab tias nws nyiam qhov qis elastic modulus nyob rau hauv -rail base plates. Kev tsheb ciav hlau hauv nroog tsheb ciav hlau muaj kev khiav hauj lwm ntau zaus, nquag pib thiab nres, thiab feem ntau dhau los ntawm cov cheeb tsam hauv nroog, nrog cov kev cai nruj rau kev tswj lub suab nrov thiab kev co. Tsawg-modulus puag daim hlau (60-80MPa) tuaj yeem nqus tau qis- zaus vibrations, tswj suab nrov qis dua 65dB, thiab ua tau raws li cov qauv kev tiv thaiv hauv nroog. Tsawg elastic modulus puag daim hlau muaj qhov loj deformation, uas tuaj yeem cuam tshuam qhov kev cuam tshuam ntev thaum lub tsheb ciav hlau pib thiab nres thiab txhim kho cov neeg caij tsheb kev nplij siab. Cov kab tsheb ciav hlau hauv nroog feem ntau yog cov kab hauv av lossis cov qauv siab; qis- cov phiajcim hauv paus tuaj yeem txo qhov kev sib kis ntawm kev co mus rau cov tsev nyob ib puag ncig, tsis txhob muaj kev cuam tshuam ntawm cov qauv thiab kev cuam tshuam ntawm cov neeg nyob hauv. Piv nrog rau siab-modulus puag daim hlau, qis-modulus puag daim hlau muaj zog adaptability, tuaj yeem sib phim nrog cov tsheb ciav hlau hauv nroog tshwj xeeb cov neeg pw tsaug zog, txo cov log-rail kev sib cuag kev ntxhov siab, thiab txuas ntxiv lub neej kev pab cuam ntawm kev tsheb nqaj hlau thiab lub log. Nyob rau tib lub sijhawm, nws muaj kev yooj yim dua installation thiab tuaj yeem hloov kho sai rau cov chaw nres tsheb ntom ntom thiab kev ua haujlwm nyuaj ntawm cov kab tsheb ciav hlau hauv nroog.
Dab tsi yog qhov elastic modulus tswj kev ntsuas rau hauv qab -rail base plates nyob rau hauv cheeb tsam alpine?
Qhov kub tsis tshua muaj nyob hauv thaj tsam alpine yuav ua rau kev ruaj ntseg ntawm lub hauv paus phaj lub elastic modulus, yog li kev tswj xyuas cov phiaj xwm xav tau los xyuas kom meej qhov ua tau zoo. Hais txog cov khoom siv, txias -resistant polyurethane los yog hloov roj hmab yog xaiv, thiab txias -cov yas resistant yog ntxiv rau cov mis, kom cov elastic modulus ntawm lub hauv paus phaj tseem tuaj yeem tswj tau ntau dua 90% ntawm tus nqi tsim ntawm -50 degree, tsis txhob qis - kub embrittlement. Hauv cov txheej txheem tsim khoom, qis-kub vulcanization thev naus laus zis tau txais los txhim kho qhov qis-kub adaptability ntawm cov qauv sab hauv ntawm lub hauv paus phaj thiab txo qhov kev hloov tam sim ntawm modulus ntawm qhov kub thiab txias. Lub hauv paus daim hlau yog pre-txias thiab sab laug ntawm -40℃rau 24 teev ua ntej tawm hauv lub Hoobkas los tshuaj xyuas cov khoom uas muaj ntau dhau modulus fluctuations, kom ntseeg tau tias lub hauv paus daim hlau muab tso rau hauv kev siv muaj kev ruaj ntseg. Thaum lub sij hawm installation, ib tug thermal rwb thaiv tsev cushion yog ntsia nruab nrab ntawm lub hauv paus phaj thiab cov pw tsaug zog kom txo tau qhov ncaj qha cuam tshuam ntawm qhov kub thiab txias ntawm lub hauv paus phaj thiab tuav nws ua hauj lwm kub siab tshaj -20 degree. Lub modulus ntawm lub hauv paus phaj yog saib xyuas tsis tu ncua, nrog rau kev kuaj xyuas txhua lub hlis twg. Yog hais tias lub modulus sib txawv tshaj 10%, nws yog hloov nyob rau hauv lub sij hawm los xyuas kom meej lub poob siab absorber thiab bearing kev ua tau zoo ntawm alpine kab.
Dab tsi yog qhov cuam tshuam ntawm elastic modulus attenuation ntawm hauv qab -rail base plates ntawm kab khiav haujlwm?
Lub attenuation ntawm lub elastic modulus nyob rau hauv - rail puag daim hlau yuav ncaj qha ua rau cov kab poob siab absorbing thiab bearing system thiab ua rau ib tug series ntawm kev ua hauj lwm teeb meem. Modulus attenuation yuav txo qhov kev poob siab ntawm kev ua haujlwm ntawm lub hauv paus phaj, lub log -rail kev co tsis tuaj yeem nqus tau zoo, thiab lub tsheb ciav hlau lub suab nrov yuav nce ntxiv. Cov kab tsheb ciav hlau hauv nroog yuav muaj ntau dua li cov qauv kev tiv thaiv ib puag ncig thiab ua rau muaj kev tsis txaus siab hauv zej zog. Tsis txaus modulus yuav txo tau lub peev xwm ntawm lub hauv paus phaj, uas ua rau ntau deformation nyob rau hauv lub tsheb ciav hlau load, ua rau taug qab ntsug irregularity, aggravating log -rail coj, thiab shortening cov kev pab cuam lub neej ntawm rails thiab log. Ntev - lub sij hawm modulus attenuation yuav ua rau lub deterioration ntawm khiav geometry, tshaj tus qauv ntawm gauge thiab kab rov tav sib txawv, ua rau cov zaus thiab cov nqi ntawm kev kho kab. Hnyav- cov kab tsheb thauj khoom kuj tseem tuaj yeem ua rau kev tsheb ciav hlau hloov pauv vim qhov tsis ua haujlwm modulus. Nyob rau hauv cov xwm txheej hnyav, modulus attenuation yuav ua rau lub hauv paus phaj tawg, poob poob siab absorbing thiab bearing functions. Kev cuam tshuam muaj zog yuav tshwm sim thaum lub tsheb ciav hlau hla, hem kev nyab xeeb ntawm kev tsav tsheb thiab txawm ua rau muaj xwm txheej loj xws li derailment.