Los laij covKev sib txhuamua yeeb yam ntawm aTowed Mobile Scissor NqaRaws li nws txav, peb feem ntau xavDov Tshuab(es tsis txhob swb kev sib txhuam) txij li lub neej no feem ntau txav ntawm cov log .
Step-rau-kauj ruam txheej txheem:
1. Txiav txim siab lub zog ib txwm (hnyav)
Ua ntej, laij tag nrho qhov hnyav tag nrho ntawm cov scissor nqa:
Kev ua kom tsis muaj zog=m⋅gf {{1} {\\ {} {}} m \\ cdot g
hli: loj ntawm cov scissor nqa (hauv kg)
GG: Kev nrawm vim yog lub ntiajteb txawj nqus (kwv yees . 9.81 m / s²)
Yog tias nqa tau nyob ntawm ib qho chaw tiaj tiaj, lub zog ib txwm muaj sib npaug ntawm qhov hnyav tag nrho .
2. rolling tsis kam ntawm mis
TusKev Sib Txhuam (Kuj) YuamFrf _ r vim yob yog:
Fr=b⋅fnormalf _ r}} r \\ cdot f {\\ {ib txwm {?
FRF _ r: dov tawm tsam yuam (hauv Newtons)
CRC _ r: coefficient ntawm yob tsis kam (kawg 0.002-0.02 rau cov log tsheb roj hmab ntawm pob zeb ntawm pob zeb
FNormalf _ {\\ {qub {}}:}} m⋅gm \\ cdot g
Piv txwv li: rau 1500 kg tsa nrog cov log tsheb roj hmab ntawm cov pob zeb ua:
Crholes0.01c _ r \\ kwv yees li 0.01, yog li:
Fr =0.01} ⋅ (1500⋅9.81) {}} {} {} {{{{\\ cdot 14, 715=147.15 \\ ntawv {n}
{{0 {}} Xav txog cov neeg (yog tias muaj)
Yog tias nqa yog ntawm txoj kab nqes:
Kev sib dhos, sib thooj=m⋅g⋅sin (} {l} {m \\ {m \\ cdot g \\ cdot \\ sin (\\ theta)
Ntxiv qhov no rau cov dov ua kev tsis kam yog tias koj suav tag nrho cov quab yuam xav tau rau tow dej nce .
{{04.}} Add cua lossis luag (yog tias txav nrawm)
Yog tias teed ntawm kev ceev nrawm (e {. g.}}, tom qab lub tsheb), suav nrogAerodynamic luag:
Fd =12}} _}}}}}} d \\ cdot a \\ cdot v ^ 2
Qhov twg:
ρ o rho: huab cua ntom ntom (≈ 1.225 kg / mp)
CDC _ d: luag coefficient (~ 1.0-1.3 rau blunt tsheb)
AA: Cheeb Tsam Hauv Ntej (M²)
VV: Velocity (m / s)
Qhov no yog nyob ntawm xaiv tshwj tsis yog koj ua qhov kev ntsuas ceev ceev .
Cov ntsiab lus ntawm (tiaj tiaj):
FFricion=cr⋅m⋅gf {} {\\ {2} {}} r \\ cdot m \\ cdot g
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