1,Tsarin gazawar MC pulley da bincike na dalili　

　　MC nailan abu ya zama polyamide sinadarai kuma ya ƙunshi covalent da molecular bonds, watau intra-molecular bonded by covalent bonds da inter-molecular bonded by molecular bonds.Wannan tsarin kayan yana da fa'idodi iri-iri kamar nauyin nauyi, juriya, juriya na lalata, rufi, da sauransu. Filas ɗin injiniya ne da ake amfani da shi sosai [1].　

　　Nailan MC nailan da aka yi amfani da shi a ƙofar garkuwa na Tianjin Metro Line 2 zai sami nau'i biyu na rashin nasara bayan wani lokaci: (1) sawa a gefen waje na pula;(2) sharewa tsakanin zobe na ciki na jallo da abin ɗamara.

Dalilan waɗannan nau'ikan gazawar guda biyu na sama, ana yin bincike mai zuwa.　

　　(1) Jikin kofa ba daidai ba ne, kuma matsayi na ɗigon zai kasance ba daidai ba yayin aiki, wanda zai sa gefen waje ya yi rauni, kuma ƙarfin gefen ciki na ɗigon da abin ɗamara zai bayyana ta hanyoyi daban-daban. damuwa sarari.　

　　(2) waƙa ba ta miƙe ba ko saman waƙa ba ta faɗi ba, yana haifar da lalacewa a waje.　

　　(3) Lokacin da kofar ta bude ta rufe, kofar da ke zamiya ta motsa, zamiya ta kan dora nauyin hawan keke na tsawon lokaci, wanda hakan ya haifar da nakasar gajiya, sai dabarar da ke ciki ta nakasa kuma ta samu tazara.　

　　(4) Ƙofa a hutawa, ɗigon ya kasance yana ɗaukar nauyin ƙofar zamewa, tsawon lokaci don ɗaukar ƙayyadaddun kaya, yana haifar da nakasawa.　

　　(5) Akwai bambanci mai taurin kai tsakanin abin ɗamarar ɗaki da jakunkuna, kuma aikin extrusion na dogon lokaci zai haifar da nakasawa kuma ya haifar da gazawa [2].　

　　2 MC pulley tsarin lissafin rayuwa　

　　MC nailan pulley wani tsari ne na polymer na kayan aikin injiniya, a cikin ainihin aikin aiki, ta wurin zafin jiki da kuma nauyin nauyin, tsarin kwayoyin halitta na nakasar da ba za a iya jurewa ba, wanda a ƙarshe ya kai ga lalata kayan [3].　

　　(1) An yi la'akari da yanayin zafi: tare da canjin yanayin zafi a cikin yanayi, dangantaka mai zuwa ta kasance tsakanin kayan jiki na kayan aikin kayan aiki da lokacin rashin nasara, wanda aka bayyana a matsayin aiki na　

　　F (P) = Kτ (1)　

　　inda P shine ƙimar dukiya ta jiki da na inji;K shine yawan dauki akai akai;τ shine lokacin tsufa.　

　　Idan an ƙaddara kayan aiki, to, an ƙayyade ƙimar P na sigogi na jiki na wannan kayan, kuma an saita ƙimar garanti na tensile da lankwasawa sama da 80%, to, dangantakar dake tsakanin lokaci mai mahimmanci da K akai-akai.　

　　τ=F(P)/K (2)　

　　Matsakaicin K da zafin jiki T sun gamsar da alaƙa mai zuwa.　

　　K=Ae(- E/RT) (3)　

　　inda E shine makamashin kunnawa;R shine madaidaicin iskar gas;A da e sune akai-akai.Ɗaukar logarithm na sama biyu dabaru da lissafi da sarrafa nakasawa, mun samu　

　　lnτ = E/ (2.303RT) C (4)　

　　A cikin ma'auni da aka samu na sama, C shine akai-akai.Bisa ga lissafin da ke sama, an san cewa akwai irin wannan kyakkyawar dangantaka tsakanin lokaci mai mahimmanci da zafin jiki .Ci gaba da nakasar ma'aunin da ke sama, mun samu.　

　　lnτ= ab/T (5)　

　　Bisa ga ka'idar bincike na lambobi, an ƙayyade ma'auni a da b a cikin ma'auni na sama, kuma ana iya ƙididdige rayuwa mai mahimmanci a zafin sabis.　

　　Layin metro na Tianjin 2 asali ne tasha ta karkashin kasa, saboda rawar da kofar garkuwa take da kuma kula da zobe, yanayin zafin da ke cikin injin din yana da kwanciyar hankali a duk shekara, wanda aka auna ta hanyar daukar matsakaicin darajar 25.°, bayan duba tebur, za mu iya samun a = -2.117, b = 2220, kawo t = 25.° zuwa (5), za mu iya samuτ = shekara 25.4.Ɗauki matakin aminci na 0.6, kuma sami ƙimar aminci na shekaru 20.3.　

　　(2) lodi akan nazarin rayuwar gajiyawa: tsinkayar da ke sama don la'akari da zafin jiki na lissafin rayuwa, kuma a cikin ainihin amfani, ƙwanƙwasa kuma za ta kasance ƙarƙashin rawar nauyi, ƙa'idarsa ita ce: tsarin ƙwayoyin ƙwayoyin polymer Aiki na madaidaicin kaya ya haifar da juyin halitta wanda ba zai iya jurewa ba da lalacewar tsarin kwayoyin halitta, ma'aikatan injiniya a kan rawar sarkar kwayoyin halitta, sun haifar da juyawa da murdiya, samuwar nau'in azurfa da nau'in nau'i na azurfa, yana nuna gajiya, tare da tara manyan abubuwa. yawan lodin sake zagayowar sake zagayowar, ƙirar azurfa a hankali ta faɗaɗa, ta samar da tsagewa, kuma ta faɗi sosai, kuma a ƙarshe ta haifar da karyewar kayan lalacewa.　

　　A cikin wannan lissafin rayuwa, ana gudanar da nazarin rayuwa a ƙarƙashin yanayin yanayi mai kyau, watau hanya tana da lebur kuma matsayin jikin kofa shima lebur ne.　

　　Da farko ka yi la'akari da tasirin mitar kaya akan rayuwa: kowace kofa mai zamewa tana da ɗigo huɗu, kowane ɗigon yana raba kashi ɗaya cikin huɗu na nauyin ƙofar, bayan an duba bayanin cewa nauyin ƙofar da ke zamewa yana da kilogiram 80, ana iya samun nauyin kofa: 80× 9.8 = 784 N.　

　　Sa'an nan kuma raba nauyi akan kowane juzu'i kamar: 784÷ 4 = 196 N.　

　　Faɗin ƙofar da ke zamewa yana da 1m, wato, a duk lokacin da aka buɗe ƙofar kuma a rufe da 1m, sannan a auna diamita na ɗigon 0.057m, ana iya ƙididdige shi azaman kewayensa: 0.057.× 3.14 = 0.179m.　

　　Sa'an nan ƙofar zamiya ta buɗe sau ɗaya, adadin jujjuyawar abin da ake buƙata za a iya samu: 1÷ 0.179 = 5.6 juya.　

　　Dangane da bayanan da Ma'aikatar Kula da zirga-zirgar ababen hawa ta bayar, adadin gudu a gefe ɗaya na wata shine 4032, wanda za a iya samu daga adadin gudu a kowace rana: 4032÷ 30 = 134.　

　　kowace safiya tashar za ta gwada ƙofar allo kamar sau 10, don haka jimlar yawan motsin kofa a kowace rana shine: 134 10 = sau 144.　

　　Zamiya kofa sau ɗaya, juzu'in juyi 11.2, ƙofar zamewar rana tana da zagayowar juyawa 144, don haka jimlar adadin laps a rana: 144× 5.6 = 806.4 juya.　

　　Kowane cinya na juzu'i, dole ne mu kasance ƙarƙashin sake zagayowar ƙarfi, don mu sami mitar ƙarfinsa: 806.4÷ (24× 3600) = 0.0093 Hz.　

　　Bayan duba bayanan, 0.0093 Hz wannan mita ya dace da adadin hawan da ke kusa da rashin iyaka, yana nuna cewa yawan nauyin nauyin yana da ƙananan ƙananan, a nan baya buƙatar la'akari.　

　　(3) sake la'akari da tasirin matsa lamba akan rayuwa: bayan bincike, hulɗar tsakanin jan hankali da waƙa don hulɗar saman, an kiyasta yankinsa: 0.001.1× 0.001.1 = 1.21× 10-6m2　

　　Dangane da ma'aunin matsa lamba: P = F / S = 196÷ 1.21× 10-6 = 161× 106 = 161MPa　

　　Bayan duba tebur, adadin hawan keke daidai da 161MPa shine 0.24×106;bisa ga lambar sake zagayowar wata-wata sau 4032, ana iya samun adadin zagayowar a cikin shekara: 4032×12=48384 sau　

　　Sa'an nan kuma za mu iya samun wannan matsa lamba daidai da rayuwar jan hankali: 0.24× 106÷ 48384 = 4.9 shekaru