Ua ntej, qhov pib qhia ntawm tooj dag raj
Cov yeeb nkab tooj dag yog cov khoom siv tubular ua los ntawm cov khoom siv tooj dag, nrog cov thermal thiab hluav taws xob zoo, dav siv hauv kev tsim cov kav dej, cov kav dej roj, cov kav dej thiab lwm cov kav dej. Qhov hnyav ntawm tooj dag raj muaj feem xyuam rau nws cov khoom siv ntom ntom, phab ntsa thickness, txheej kab thiab lwm yam tsis.
Thib ob, theoretical qhov hnyav ntawm tooj dag raj siv txoj kev suav
Lub theoretical hnyav ntawm cov yeeb nkab tooj dag tuaj yeem xam los ntawm cov qauv hauv qab no:
Luj=π × (sab nraud txoj kab uas hla ² - puab kab ²) × ntev × cov khoom ceev ÷ 4
Qhov twg π yog lub voj voog 3.14, sab nraud thiab sab hauv txoj kab uas hla ntawm cov yeeb nkab sab nraud thiab sab hauv txoj kab uas hla, feem, qhov ntev yog qhov ntev ntawm cov yeeb nkab, cov khoom ntom ntom yog qhov ntom ntawm tooj dag, feem ntau 8.4 g / cubic centimeter.
Thib peb, qhov hnyav ntawm tooj dag kav piv txwv
Cov mis rau xam qhov hnyav ntawm cov yeeb nkab tooj dag ib 'meter' yog 0.0267 × phab ntsa thickness × (sab nraud txoj kab uas hla - phab ntsa thickness) × ntev.
Cov yeeb nkab tooj dag yog cov khoom siv hauv cov kav dej, thiab nws txoj kev ntsuas qhov hnyav yog txawv ntawm cov yeeb nkab tooj liab. Cov mis rau xam qhov hnyav ntawm cov yeeb nkab tooj dag yog qhov hnyav ib 'meter' sib npaug 0.0267 npaug ntawm phab ntsa thickness, qhov sib txawv ntawm cov kab thiab phab ntsa thickness, thiab qhov ntev. Cov mis no muab txoj hauv kev yooj yim thiab ncaj nraim los xam qhov hnyav ntawm cov tubing tooj dag thiab siv tau rau txhua qhov ntau thiab tsawg ntawm tooj dag tubing. Los ntawm cov qauv no, koj tuaj yeem xam qhov hnyav ntawm cov yeeb nkab tooj dag, sai thiab raug xam tias yog rau kev yuav khoom lossis kev siv nyiaj txiag, tuaj yeem muab kev yooj yim zoo.
Siv lub raj tooj dag nrog lub taub sab nraud ntawm 25mm, ib txoj kab uas hla ntawm 20mm thiab qhov ntev ntawm 1m ua piv txwv los xam nws qhov hnyav theoretical:
Luas=π × (25²-20²) × 1 × 8.4 ÷ 4 ≈ 1.82 kg
Plaub, sau ntawv
1. Qhov tseeb qhov hnyav ntawm lub raj tooj dag tuaj yeem cuam tshuam los ntawm kev siv thev naus laus zis thiab lwm yam, cov txiaj ntsig suav yog siv rau kev siv nkaus xwb.
2. Hauv kev siv tiag tiag, nws raug nquahu kom ntxiv qee yam kev nyab xeeb raws li cov xwm txheej tshwj xeeb kom ntseeg tau tias muaj kev nyab xeeb thiab kev ntseeg siab ntawm cov yeeb nkab.
Theoretical luj ntawm tooj dag cov yeeb nkab laij lej txoj kev yog qhov yooj yim, tsuas yog yuav tsum paub lub sab kab ntawm cov yeeb nkab, puab txoj kab uas hla, ntev thiab cov khoom ceev thiab lwm yam tsis muaj peev xwm xam tau. Hauv kev siv cov yeeb nkab tooj dag, raws li cov kev xav tau tshwj xeeb thiab qhov xwm txheej tiag tiag los txiav txim siab cov phab ntsa tuab ntawm cov yeeb nkab thiab lwm yam tsis zoo, txhawm rau ua kom cov yeeb nkab zoo thiab siv kev nyab xeeb.
