Kev tshawb fawb txog theoretical lub hauv paus ntawm tsim kom ua tau zoo ntawm findagable finges thiab yoog raws lub cev mechanism1

Abstract: Qhov kev tshawb fawb no tsom rau kev kawm cov matrix yooj yim ntawm txoj kev ncaj lub nqaj sib npaug zom cov pob khawm. Qhov ntsuas kev txheeb xyuas kev sib tw rau hauv-dav hlau defformation ntawm lub pob khawm yog muab tau raws li lub cantilevever nqaj txoj kev xav. Cov qauv kaw-lub voj txhais lus rau cov qauv levrix uas tau tsim, thiab qhov yooj yim sib piv rau kev xaiv lub ces kaum vojvoog thiab pob khawm tuab thiab khawm tuab. Ib qho ntxiv, tus qauv zoo ntawm lub pob khawm tau tsim los xyuas qhov tseeb ntawm cov qauv analytical. Cov txheeb ze yuam kev nruab nrab ntawm kev tshuaj xyuas thiab simulation qhov tseem ceeb ntawm qhov hloov pauv hloov kho kom haum yog kev tshuaj xyuas rau cov qauv pob zeb sib txawv. Cov txiaj ntsig tau qhia tias tus qauv analysical yog qhov tseeb, thiab cov txheeb ze ua tsis raug yuav tswj tau hauv kev txwv tsis pub dhau.

Saj zawg zog hinges tau dav siv nyob rau hauv cov khoom siv ntsuas vim yog lawv qhov zoo ntawm kev daws teeb meem zoo, tsis muaj kev sib txhuam, thiab cov txheej txheem tsim kev sib txhuam, thiab yooj yim yooj yim. Cov hinges cia siab rau lawv tus kheej Elastic Discacation los xa lossis hloov cov lus tsa suab, quab yuam, lossis lub zog, tshem tawm cov kev xav tau rau cov roj rigid. Tus yuam sij ntawm ib lub pob khawm hloov tau ncaj qha cuam tshuam nws cov yam ntxwv zoo thiab xaus txoj haujlwm raug. Kev tshawb fawb yav dhau los tau tsom mus rau ntau hom sib txawv ntawm cov pob khawm, tab sis kev tshawb fawb tsawg tau ua rau txoj kev ncaj ntawm lub nqaj sib npaug zom cov pob khawm. Daim ntawv no aims los sau qhov kev tshawb fawb no los ntawm kev kawm txog cov matrix yooj yim ntawm xws li hinges.

1. Yooj taus matrix ntawm txoj kev ncaj lub nqaj sib npaug hindes:

Txoj kev ncaj lub nqaj sib npaug khawm sib npaug Lub pob khawm qhov chaw ntsuas hluav taws xob suav nrog qhov siab, ntev, tuab, thiab fillet vojvoog. Tus qauv kaw-voj txhais lus rau cov matrix yooj yim ntawm cov pob khawm tau tsim los ntawm kev ntsuas kev tawm tsam hauv-dav hlau deformation. Qhov yooj yim hloov matrix tsis txheeb xyuas rau cov pob khawm sib txawv, thiab cov txheeb ze ua yuam kev ntawm kev ntsuas thiab simulation muaj nuj nqi raug suav.

2. Finite Element ntawm qhov yooj yim latrix:

Txhawm rau kom raug qhov tseeb ntawm cov qauv analytical, tus qauv zoo ntawm lub pob khawm yog tsim tau siv Ugnx Nastran Software. Kev sim raws li lub pob khawm uas tau loaded nrog chav ua haujlwm (lub zog yog muab piv nrog kev ntsuas qhov tseem ceeb. Cov txheeb ze qhov yuam kev ntawm kev txheeb xyuas qhov tseem ceeb thiab simulation qhov tseem ceeb ntawm kev sib piv ntawm kev sib piv ntawm kev sib piv ntawm kev sib piv ntawm kev sib piv ntawm kev sib piv ntawm cov pob khawm sib piv rau cov tuab (L / T).

2.1 Cov nyhuv ntawm L / T on yooj yim latrix tsis:

Cov txheeb ze yuam kev nruab nrab ntawm kev tshuaj xyuas thiab simulation qhov tseem ceeb ntawm qhov hloov pauv hloov kho tau zoo li hauv 5.5% thaum cov lej l ntau dua lossis sib npaug rau 4. Rau kev sib piv tau tsawg dua 4, qhov yuam kev txheeb ze nce vim yog qhov kev txwv ntawm cov ntoo txeej kev xav. Yog li ntawd, lub voj kaw-xov tooj analytical yog haum rau cov hinges nrog loj l / t sib piv.

2.2 Cov nyhuv ntawm r / t on yooj yim latrix tsis:

Cov txheeb ze yuam kev nruab nrab ntawm kev tshuaj ntsuam thiab simulation qhov tseem ceeb ntawm qhov hloov pauv hloov zuj zus mus nrog kev nce hauv R / T. Rau kev sib piv ntawm 0.1 thiab 0.5, qhov txheeb ze yuam kev tuaj yeem tswj tsis pub dhau ntawm 9%. Rau kev sib piv ntawm 0.2 thiab 0.3, cov txheeb ze yuam kev tuaj yeem tswj tsis pub dhau 6.5%.

2.3 Cov nyhuv ntawm R / T ntawm Yooj Yim Yooj Yim Matrix tsis:

Yooj yim Analytical cov qauv rau qhov yooj tau zoo matrameters yog muab kev txiav txim siab qhov sib piv r / t. Qhov txheeb ze sib npaug ntawm cov txiaj ntsig contrally thiab cov nqi simulation nce nrog kev nce hauv r / t. Rau kev sib piv ntawm 0.3 thiab 0.2, qhov txheeb ze yuam kev tuaj yeem tswj tsis pub dhau 9% thiab 7%, feem.

Cov tsim tawm kaw-Voj Analytical qauv ntawm kev ncaj loj lev hloov kho lub hauv paus rau kev tsim kho thiab kev ua kom haum ntawm cov pob khawm thiab cov txheej txheem. Qhov tseeb ntawm tus qauv yog siv tau los ntawm cov ntsiab lus zoo, thiab cov txheeb ze ua tsis raug yog nyob hauv kev txwv cov qauv sib txawv. Qhov kev tshawb fawb no ua rau muaj kev nkag siab thiab cov ntawv thov ncaj nqaj tsa cov pob khawm sib npaug hauv ntau yam.