1,Ifomu yokungaphumeleli kwe-MC pulley kunye nohlalutyo lwesizathu　

　　Imathiriyeli yenayiloni yeMC iba yipolyamide ngokwekhemikhali kwaye iqulathe iibhondi ze-covalent kunye nemolekyuli, okt intra-molecular edityaniswe ngamabhondi adibeneyo kunye ne-inter-molecular edityaniswe ngamabhondi emolekyuli.Esi sakhiwo sezinto eziphathekayo sineenzuzo ezahlukeneyo ezifana nobunzima obulula, ukuxhathisa ukunxiba, ukuxhathisa ukubola, ukugquma, njl njl. Yiplastiki yobunjineli esetyenziswa ngokubanzi [1].　

　　I-MC nylon pulley esetyenziswe kumnyango wekhaka le-Tianjin Metro Line 2 iya kuba nezi ndlela zimbini zokungaphumeleli emva kwexesha elithile: (1) ukunxiba kumda wangaphandle wepuli;(2) ukukhutshwa phakathi kwendandatho yangaphakathi yepuli kunye nokuthwala.

Izizathu zezi ndlela zimbini zingasentla zokungaphumeleli, uhlalutyo olulandelayo lwenziwa.　

　　(1) Umzimba wocango awuchanekanga, kwaye indawo ye-pulley ayiyi kuphosakela ngexesha lokusebenza, okuya kubangela ukuba umgca wangaphandle uguge, kwaye amandla ecala langaphakathi le-pulley kunye nokuthwala kuya kubonakala kumacala ahlukeneyo. uxinzelelo lwendawo.　

　　(2) umzila awuthe tye okanye umphezulu womkhondo awumcaba, ubangela ukuguga ngaphandle.　

　　(3) Xa umnyango uvula kwaye uvale, ucango lokutyibilika luhamba, ivili elijikelezayo liphantsi komthwalo we-cyclic ixesha elide, okubangela ukuguqulwa kokukhathala, ivili elingaphakathi le-pulley likhubazekile kwaye i-gap yenziwe.　

　　(4) umnyango ekuphumleni, i-pulley ithwele ubunzima bomnyango wokutyibilika, ixesha elide lokuthwala umthwalo osisigxina, okubangela ukuguqulwa kwe-creep.　

　　(5) Kukho umahluko wobunzima phakathi kokuthwala kunye ne-pulley, kunye nesenzo sexesha elide le-extrusion liya kuvelisa i-deformation kwaye ibangele ukusilela [2].　

　　2 MC pulley ubomi inkqubo yokubala　

　　I-MC nylon pulley sisakhiwo sepolymer sezinto zobunjineli, kumsebenzi wokwenene wokusebenza, ngobushushu kunye nendima yomthwalo, isakhiwo se-molecular of deformation engenakuguqulwa, ekugqibeleni ikhokelela ekutshatyalalisweni kwezinto [3].　

　　(1) Ithathelwa ingqalelo ngokweqondo lobushushu: ngotshintsho lweqondo lobushushu ngaphakathi kokusingqongileyo, olu budlelwane bulandelayo bukhona phakathi kweempawu ezibonakalayo zamacandelo esixhobo kunye nexesha lokusilela, elichazwa njengomsebenzi　

　　F (P) = Kτ (1)　

　　apho iP ilixabiso lepropathi ebonakalayo neyomatshini;I-K yireyithi yokusabela rhoqo;τ lixesha lokuguga.　

　　Ukuba i-material igqitywe, ngoko ixabiso le-P leeparamitha ezibonakalayo zesi sixhobo lichongiwe, kwaye ixabiso eliqinisekisiweyo le-tensile kunye nokugoba libekwe ngaphezu kwe-80%, ngoko ubudlelwane phakathi kwexesha elibalulekileyo kunye no-K rhoqo.　

　　τ=F(P)/K (2)　

　　I-K engaguqukiyo kunye nobushushu be-T iyanelisa olu budlelwane bulandelayo.　

　　K=E(- E/RT) (3)　

　　apho i-E ingamandla okusebenza;R yeyona gas engaguqukiyo;U-A kunye no-e zizigxina.Ukuthatha i-logarithm yezi fomyula zimbini zingasentla ngokwemathematika kunye nokusetyenzwa kwe-deformation, siyayifumana　

　　lnτ = E/(2.303RT) C (4)　

　　Kule nxaki ifunyenwe ngasentla, uC uyinto engatshintshiyo.Ngokwe-equation engentla, kwaziwa ukuba kukho ubudlelwane obuhle obufanayo phakathi kwexesha elibalulekileyo kunye nobushushu .Ukuqhubela phambili kunye ne-deformation ye-equation engentla, sifumana.　

　　lnτ=ab/T (5)　

　　Ngokutsho kwethiyori yohlalutyo lwamanani, i-constants a kunye ne-b kwi-equation engentla inqunywe, kwaye ubomi obubalulekileyo kwiqondo lokushisa lenkonzo bungabalwa.　

　　I-Tianjin metro line 2 ngokusisiseko sisikhululo esingaphantsi komhlaba, ngenxa yendima yomnyango wekhaka kunye nolawulo lwendandatho, iqondo lokushisa apho i-pulley ibekwe khona lizinzile unyaka wonke, lilinganiswa ngokuthatha ixabiso eliqhelekileyo le-25.°, emva kokujonga itafile, sinokufumana i = -2.117, b = 2220, yizisa t = 25° kwi (5), singafumanaτ = 25.4 iminyaka.Thatha ukhuseleko lwe-0.6, kwaye ufumane ixabiso lokhuseleko le-20.3 iminyaka.　

　　(2) umthwalo kuhlalutyo lobomi bokukhathala: olu qikelelo lungentla luqwalaselo lobushushu bokubalwa kobomi be-pulley, kunye nokusetyenziswa okwenyani, i-pulley iya kuba phantsi kwendima yomthwalo, umgaqo wayo ngulo: isakhiwo se-polymer molecular phantsi Intshukumo yomthwalo otshintshanayo yavelisa inguquko engenakujikwa kunye nokuguqulwa kwesakhiwo semolekyuli, abasebenzi bomatshini kwindima yetsheyini lemolekyuli, bavelisa ukujikeleziswa kunye nokugqwetheka, ukubunjwa kwepateni yesilivere kunye nebhendi yesilivere yeepateni, ifanekisela ukukhathala, kunye nokuqokelelana okukhulu. inani ukulayisha umjikelo alternating, ipateni yesilivere ngokuthe ngcembe yandiswa, ukwenza intanda, kwaye kabukhali banzi, yaye ekugqibeleni kwakhokelela ukwaphuka umonakalo eziphathekayo.　

　　Kolu balo lobomi, uhlalutyo lobomi lwenziwa phantsi kweemeko zendawo efanelekileyo, oko kukuthi, umzila usicaba kwaye indawo yomzimba womnyango nayo ilula.　

　　Okokuqala qwalasela impembelelo yomthamo womthwalo kubomi: umnyango ngamnye wokutyibilika uneepuli ezine, i-pulley nganye yabelana ngekota yobunzima bomnyango, emva kokujonga ulwazi lokuba ubunzima bomnyango wokutyibilika bu-80kg, ubunzima bomnyango bunokufumaneka: 80× 9.8 = 784 N.　

　　Emva koko yabelana ngomxhuzulane kwipuli nganye njenge: 784÷ 4 = 196 N.　

　　Ububanzi bomnyango we-sliding yi-1m, oko kukuthi, ixesha ngalinye umnyango uvuliwe kwaye uvaliwe kwi-1m, kwaye emva koko ukulinganisa ububanzi be-pulley yi-0.057m, ingabalwa njenge-perimeter yayo: 0.057× 3.14 = 0.179m.　

　　Emva koko umnyango otyibilikayo uvula kube kanye, inani lokujika ipuli kufuneka lihambe linokufumaneka: 1÷ 0.179 = 5.6 ijika.　

　　Ngokweenkcukacha ezinikwe liSebe loLawulo lwezoThutho, inani lemitsi kwelinye icala lenyanga ngama-4032, elinokuthi lithathwe kwinani lemitsi ngosuku: 4032÷ 30 = 134.　

　　ntsasa nganye isikhululo siya kuvavanya umnyango wesikrini malunga namaxesha ali-10, ngoko ke inani lilonke leentshukumo zocango lokutyibilika ngosuku: 134 10 = 144 amaxesha.　

　　Slayida umnyango switsha kube kanye, ipuli ukuya 11.2 ukujika, usuku sliding ucango ine 144 umjikelo wokutshintsha, ngoko ke inani lilonke lepuli ejikelezayo ngosuku: 144× 5.6 = 806.4 ijika.　

　　I-lap nganye ye-pulley kufuneka sixhomekeke kumjikelo wamandla, ukuze sifumane i-frequency yayo yamandla: 806.4÷ (24× 3600) = 0.0093 Hz.　

　　Emva kokutshekisha idatha, i-0.0093 Hz le frikhwensi ihambelana nenani lemijikelezo esondeleyo kwi-infinity, ebonisa ukuba i-frequency yomthwalo iphantsi kakhulu, apha ayifuni ukucinga.　

　　(3) kwakhona ukuqwalasela impembelelo yoxinzelelo kubomi: emva kokuhlalutya, uqhagamshelwano phakathi kwe-pulley kunye nomzila wokudibanisa umphezulu, ngokuqikelelwa indawo yayo: 0.001.1× 0.001.1 = 1.21× 10-6m2　

　　Ngokutsho kwemitha yoxinzelelo: P = F / S = 196÷ 1.21× 10-6 = 161× 106 = 161MPa　

　　Emva kokujonga itafile, inani lemijikelo ehambelana ne-161MPa yi-0.24×106;ngokwenombolo yomjikelo wenyanga ngamaxesha angama-4032, inani lemijikelo ngonyaka linokufumaneka: 4032×12=48384 amaxesha　

　　Emva koko sinokufumana olu xinzelelo oluhambelana nobomi be-pulley: 0.24× 106÷ 48384 = 4.9 iminyaka