Ua ntej, txoj kev suav ntawm qhov hnyav ntawm cov yeeb nkab tooj liab liab
Kev xam qhov hnyav ntawm cov yeeb nkab tooj liab liab yuav tsum coj mus rau hauv tus account ob yam hauv qab no:
1. qhov ntev ntawm lub raj, feem ntau yog nyob rau hauv meters raws li ib chav tsev.
2. qhov chaw hla ntawm lub raj, feem ntau yog square millimeters lossis square centimeters ua ib chav tsev.
Cov mis rau xam qhov hnyav ntawm cov yeeb nkab liab liab yog raws li nram no:
Qhov hnyav (kg)=ntev (m) x cheeb tsam ntu (square meters) x ceev (kg/m3)
Qhov ntom ntawm tooj liab violet yog 8.9 g / cm³. Qhov no tuaj yeem hloov mus rau kg / cubic meter li 8900 kg / m³.
Piv txwv li, ib tug tooj liab violet raj nrog ib tug ntev ntawm 2 m, ib tug sab nraud txoj kab uas hla ntawm 20 hli thiab phab ntsa thickness ntawm 2 hli yuav tsum muaj ib tug sab hauv txoj kab uas hla ntawm 16 hli. tom qab ntawd qhov chaw hla ntawm lub raj tooj liab violet yog π(202-162)/4=157 mm². Raws li cov qauv, qhov hnyav ntawm lub raj yog hais txog: 2m x 0.157 x 8900kg / m³=2.8kg.
Qhov thib ob, cov yam ntxwv cuam tshuam rau qhov hnyav ntawm cov yeeb nkab tooj liab
1. Qhov ntev ntawm lub raj: ib qho ntawm qhov pom tseeb cuam tshuam, raws li cov qauv saum toj no, qhov cuam tshuam qhov cuam tshuam yog linear, uas yog hais tias, thaum qhov ntev yog ob npaug, qhov hnyav kuj tseem yuav tau ob npaug.
2. Hla-sectional shapes ntawm lub raj: sib txawv ntawm cov hlaws-sectional shapes tshwm sim nyob rau hauv txawv cross-sectional cheeb tsam, uas nyob rau hauv lem muaj feem xyuam rau qhov hnyav ntawm lub raj tooj liab.
3. Phab ntsa thickness ntawm lub raj: phab ntsa thickness ntawm lub raj tooj liab yuav ncaj qha cuam tshuam rau nws qhov chaw hla ntu, yog li cov phab ntsa tuab ntawm lub raj tooj liab kuj hnyav dua.
4. Cov khoom siv ntom ntom ntawm lub raj: qhov ntom ntawm cov khoom sib txawv yog qhov sib txawv, yog li qhov hnyav ntawm cov khoom sib txawv txawv yog tias lub raj muaj tib lub thickness thiab ntev.
Zuag qhia tag nrho, kev ntsuas qhov hnyav ntawm cov yeeb nkab tooj liab yog qhov yooj yim heev, tab sis koj yuav tsum ntsuas qhov ntev thiab ntu ntu ntu, nrog rau kom raug suav nrog qhov ceev. Vam tias, tsab xov xwm no yuav pab tau cov neeg nyeem los ntawm kev muab lawv cov kev taw qhia thaum saib los yog xam qhov hnyav ntawm cov ntshav liab tubing.
