Thaum lub nqaj raug kho kom huv si?

2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07

Pure dabtsi yog khoov yog ib qho kev ntxhov siab qhov twgkhoov lub sijhawm raug siv rau lub nqaj yam tsis muaj qhov sib npaug ntawm axial, shear, lossis torsional rog. Pure dabtsi yog khoov tshwm sim tsuas yog nyob rau hauv ib tug tas li khoov lub sij hawm (M) txij li thaum lub shear force (V), uas yog sib npaug rau d M d x=V, yuav tsum sib npaug zos rau xoom.

Thaum ib lub nqaj raug kho kom huv si lub beam deformation yog?

Kev piav qhia: Lub beam raug kho kom huv si, yuav tsuas muaj bending moment thiab tsis muaj shear quab yuam nws ua rau tsim ib qho arc ntawm lub voj voog nrog qee lub vojvoog hu ua Radius ntawm curvature.

Thaum lub beam raug ntshiab bending the shear force?

Cov lus nug thiab cov lus teb ntawm Lub zog shear hauv ib lub teeb raug rau qhov zoo nkauj khoov yog (positive/zero/negative)Cov lus teb yog 'zero'.

Kev khoov ntshiab tshwm sim qhov twg?

Pure dabtsi yog khoov yog hais txog flexure ntawm lub nqaj nyob rau hauv ib lub sijhawm khoov tas li. Yog li ntawd, kev khoov ntshiab tsuas yog tshwm sim hauv thaj tsam ntawm lub nqaj uas lub zog shear yog xoom.

Yuav ua li cas yog dabtsi yog khoov formula?

Txoj kev nyuaj siab yog xam rau txoj kev tsheb ciav hlau los ntawm kab zauv S_b=Mc/I , qhov twg S_b yog qhov kev ntxhov siab khoov hauv phaus ib square inch, M yog lub sijhawm khoov siab tshaj plaws hauv phaus-inches, Kuv yog lub sijhawm ntawm inertia ntawm txoj kev tsheb ciav hlau hauv (inch) ^{4, thiab c yog qhov deb ntawm inches los ntawmlub hauv paus ntawm txoj kev tsheb ciav hlau mus rau nws qhov nruab nrab axis.}