Cov xwm txheej tam sim no ntawm Lunar Railway Plans
Lunar railway systems yog nyob rau hauv lub tswvyim thiab kev kawm theem, tsis yog lub procurement theem. Tsis muaj txoj cai ntawm txoj kev tsheb ciav hlau, chaw ua haujlwm lossis cov qauv hauv lub cev tau tshaj tawm cov lus qhia rau lunar rails, spikes, clips lossis sleepers, thiab raws li kev sau ntawv ntawm tsab xov xwm no tsis muaj lunar track hardware tau tsim lossis ya. Cov lus pom zoo tshaj plaws rau pej xeem, NASA's Flexible Levitation ntawm Txoj Kev Taug Kev Tshaj Tawm tau tshaj tawm xyoo 2024, siv cov hlau nplaum levitated robots ntawm txoj kev ua yeeb yaj kiab thiab txhob txwm zam kev tsheb ciav hlau - rau - pw tsaug zog. Lwm cov tswv yim kawm siv cov qauv kev tsheb ciav hlau, thiab rau cov ntsiab lus no yuav tsum muaj qhov tsim nyog los yog clip tsim thaum kawg. Txhua yam nyob rau hauv tsab xov xwm no uas tsis qhia meej meej rau kev ntsuas lub hli ib puag ncig cov ntaub ntawv yog li ntawd ib qho kev kwv yees engineering, thiab yuav tsum tau nyeem raws li cov tswv yim tsim rau kev tshawb fawb lub tswv yim es tsis yog raws li tus qauv siv. Cov neeg yuav khoom yuav tsum ceev faj txog txhua tus neeg muag khoom thov kom muab cov khoom siv lunar fasteners hnub no.
Ib puag ncig tus Fastener yuav tsum muaj sia nyob
Lub hnub ci qhov chaw ib puag ncig tsis zoo li txhua txoj kev tsheb ciav hlau hauv av. Cov lus hauv qab no qhia txog qhov ntsuas lossis qhov zoo-tsim cov xwm txheej thiab txhua tus xav tau dab tsi los ntawm kev sib tw tsheb ciav hlau.
| Environmental factor | Lunar mob | Tsim qhov tshwm sim |
|---|---|---|
| Qhov kub thiab txias | Txog -173 deg C thaum hmo ntuj mus rau +127 deg C los ntawm hnub ntawm kab zauv | Kwv yees li 300 ° C thermal cycling; CTE mismatch ntawm steel, composites thiab lunar lug |
| Hnub- hmo ntuj | Txog 14.7 Ntiaj Teb hnub ntawm hnub, 14.7 ntawm hmo ntuj | qeeb, sib sib zog nqus thermal so; Lub voj voog qaug zog muaj tsawg tab sis hnyav hauv amplitude |
| Lub ntiajteb txawj nqus | 1.62 m/s^2, ib -6th of Earth | Txo qis rub-tawm quab yuam, tab sis kev vibration-induced loosening tseem tseem ceeb |
| Huab cua | Nyob ze - lub tshuab nqus tsev, tsis muaj huab cua zoo | Tsis muaj corrosion locking; txias welding txaus ntshai; roj thiab roj yuav tsum tsis txhob outgas |
| Nto plua plav | Electrostatically them, abrasive regolith | Jamming ntawm threads thiab mechanisms; nrawm hnav ntawm zawv zawg qhov chaw |
| Hluav taws xob | Hnub ci UV thiab them cov khoom, tsis muaj kev tiv thaiv magnetic | Polymers yuav tsum yog hluav taws xob- tshuaj ntsuam; embrittlement dhau lub sijhawm |
Cov xwm txheej no hloov qhov tseem ceeb ntawm engineering tag nrho. Nyob rau hauv lub ntiaj teb, corrosion yog qhov tseem ceeb fastener tsis ua hauj lwm hom. Nyob rau lub hli tsis muaj dej thiab tsis muaj oxygen -tsav corrosion nyob rau hauv lub siab ib txwm, tab sis lub tshuab nqus tsev txias vuam tuaj yeem fuse huv mating hlau nto, thermal cycling ntawm 300 deg C tsav qhov sib txawv ntawm cov khoom sib txawv, thiab cov hmoov av electrostatic tuaj yeem cuam tshuam cov xov nyob rau hauv cov hnub ntawm raug.
Projected Materials thiab xov yuav tsum tau
Rau lub lunar spike nqa txoj haujlwm tswj kev tsheb ciav hlau, engineering logic taw qhia rau cov khoom siv sib tw me me. Titanium alloy Ti-6Al-4V muaj lub zog zoo tshaj plaws- rau- huab hwm coj piv, kev qaug zog zoo thiab cov coefficient ntawm thermal expansion ntawm li 8.6 x 10^-6 per deg C, uas yog ze rau cov ntaub ntawv sib xyaw ua ke dua li carbon hlau. cuaj feem pua nickel steel thiab maraging steels muab cryogenic toughness kom deb li deb ntawm lub lunar hmo ntuj yam tsawg kawg nkaus, ntawm tus nqi ntawm ntau dua thiab phem CTE txuam. Aluminium alloys yog lub teeb tab sis muaj zog tsawg thiab siab nthuav dav, thiab tsuas yog haum rau cov uas tsis yog -load- cov kabmob. Rau cov khoom siv insulating, polyimide thiab PEEK- hom polymers nyiam dua cov khoom siv yas vim tias muaj hluav taws xob tsis zoo thiab qis qis, raug kuaj xyuas cov khoom siv hauv qhov chaw. Cov ntaub ntawv xov xov yuav tsum ua raws li ISO 68 thiab ISO 965 metric systems rau kev tsim khoom yooj yim, tab sis kev xauv yuav tsum ua tiav nrog cov yam ntxwv ntawm lub zog, kev sib txuas los yog lub caij nplooj ntoos hlav es tsis yog corrosion los yog xov-locking adhesives uas outgas hauv lub tshuab nqus tsev. Lubrication ntawm lub hli tsis tuaj yeem cia siab rau roj lossis roj; Cov khoom siv roj nplua nyeem xws li molybdenum disulphide yog cov txheej txheem rau lub tshuab nqus tsev.
Yuav ua li cas Lunar Requirements txawv ntawm Terrestrial Design
Qhov sib txawv tshwm sim nyob rau hauv yuav luag txhua qhov kev tsim tawm tswv yim. Pull-tawm quab yuam tuaj yeem txo qis vim tias qhov dav dav hauv ib qho - lub ntiajteb txawj nqus thib rau tsuas yog ib feem ntawm cov khoom hnyav, tab sis qhov kev tuav pov hwm yog teem los ntawm traction thiab braking quab yuam ntawm lub tsheb, tsis yog los ntawm qhov hnyav, yog li tus spike tseem xav tau lub peev xwm tiag tiag. Thermal stress dominates: steel rail 25 m ntev viav vias los ntawm kwv yees li 86 hli ntawm kev nthuav dav dawb tshaj li ntawm 300 deg C, yog li txhua lub tswv yim kev tsheb ciav hlau yuav tsum suav nrog kev tswj kev nthuav dav uas ib leeg tsis tuaj yeem muab. Cold welding quab yuam cov ntsiab lus ntawm kev kho deg los yog oxide txheej ntawm tag nrho cov mating threads. Regolith plua plav tsav qhov kev xav tau rau kev sib khi lossis tus kheej - ntxuav cov xov nkag thiab cov txheej tawv tawv ntawm qhov chaw hnav. Thiab vim tias tsis muaj cov neeg saib xyuas nyob rau hauv qhov kev zov me nyuam thaum ntxov, cov lus qhia tshwj xeeb yuav tsum tsom zero-kev tu lub neej es tsis tau teem sijhawm rov- zawm.
Kev Tshawb Fawb thiab Kev Xeem
Ua ntej txhua qhov lunar spike tuaj yeem lees txais, qhov kev xeem yuav tsum tau them rau plaub thaj chaw. Thermal cycling: ntau txhiab lub voj voog hla tag nrho -173 txog +127 deg C ntau yam nrog rub- tawm thiab torque retention check ntawm ob qho tag nrho. Nqus tus cwj pwm: kev ntsuas tawm ntawm tag nrho cov polymers thiab lubricants, thiab txias - vuam checks ntawm xov khub hauv lub tshuab nqus tsev. Plua plav kev ua tau zoo: abrasion thiab jamming xeem siv lunar regolith simulant nyob rau hauv electrostatic charging. Kev ntsuam xyuas tus qauv: rub- tawm, shear thiab qaug zog ntawm ib qho - thib rau - lub ntiajteb txawj nqus load theem. Cov no yog cov txheej txheem kev txheeb xyuas qhov chaw-hardware hloov mus rau cov khoom siv fastener; lawv yuav tsim lub hauv paus lees paub rau ib qho kev qhia yav tom ntej. Txog thaum muaj qhov tshwj xeeb no, cov lus teb ncaj ncees rau qhov kev thov rau lunar railway spike specifications yog tias cov kev cai tseem raug txiav txim siab, thiab cov lej hauv kab lus no yog qhov kev kwv yees engineering ntawm cov kev xav tau yuav zoo li cas.
Cov lus nug nquag
Q1: Puas yog lunar railway spikes tau tsim hnub no?
Tsis yog. Lunar railway cov kev pab cuam nyob rau hauv lub tswv yim theem. Tsis muaj lub koom haum tau tshaj tawm cov kev qhia tshwj xeeb thiab tsis muaj chaw tsim khoom tsim cov khoom siv lunar. Kho ib qho kev thov ntawm Tshuag lunar spikes li kev lag luam es tsis yog engineering.
Q2: Dab tsi yog qhov ntsuas kub tiag tiag rau lunar khiav?
Kev ntsuas qhov siab tshaj plaws yog kwv yees li -173 ° C thaum hmo ntuj thiab +127 ° C thaum nruab hnub ntawm kab hluav taws xob, lub viav vias ntawm li 300 ° C. Qee qhov chaw crater-shadowed tseem txias dua, uas ua rau thermal cycling qhov tseem ceeb tsim load.
Q3: Vim li cas ho tsis siv lub caij nplooj ntoos hlav terrestrial steel?
Ordinary carbon caij nplooj ntoos hlav steel poob toughness qis dua 0 deg C thiab yuav yog marginal ntawm -173 deg C. Cryogenic qib, titanium alloys los yog tshwj xeeb validated steels nrog rau cov ntaub ntawv pov thawj uas tsis tshua muaj kev cuam tshuam cov khoom yuav tsum tau hloov.
Q4: Lub hli puas muaj teeb meem corrosion?
Tsis zoo li nyob ntiaj teb. Tsis muaj dej-tsav xeb, tab sis lub tshuab nqus tsev vacuum txias tuaj yeem ua kom txias-fuse huv cov xov hlau, uas yog qhov sib txawv thiab sib npaug loj tsis ua haujlwm. Nto oxide txheej thiab cov khoom siv sib xws tau teev tseg los tiv thaiv nws.
Q5: Vim li cas regolith hmoov av tseem ceeb rau fasteners?
Lunar plua plav yog zoo, ntse thiab electrostatically them, yog li nws lo rau ntawm qhov chaw thiab tsiv mus rau hauv qhov khoob. Nws tuaj yeem cuam tshuam cov xov, qhab nia zawv zawg qhov chaw thiab abrade txheej. Kev tiv thaiv xov thiab plua plav- tiv thaiv tsim yog yuav tsum tau ua rau txhua lub hnub qub.
Q6: Cov qauv dab tsi yuav ua raws li lunar spike?
Tsis muaj lunar- tus qauv tshwj xeeb muaj. Hauv kev xyaum, ib qhov project yuav muab cov qauv xov xwm dav dav xws li ISO 965 nrog qhov chaw - kho vajtse tshuaj xyuas cov khoom siv thiab qhov project- kev lees paub tshwj xeeb, txij li cov qauv kev tsheb ciav hlau hauv av xws li EN 13481 tsis npog lub tshuab nqus tsev lossis 300 deg C thermal cycling.