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

Nthuav dav

Saj zawg zog hinges tau nce siab rau hauv cov khoom siv precision vim lawv lub peev xwm los xa tawm cov lus tsa suab lossis lub zog los ntawm ulast deform Cheebtsam. Piv rau cov tsoos suab nrov khawm, hloov tau cov hinges yoog raws li kev daws teeb meem zoo, tsis muaj kev sib txhuam, thiab cov txheej txheem tsim khoom yooj yim. Lawv tau siv dav hauv ntau cov cuab yeej ua kom pom tseeb, hluav taws xob ntsuas phoo, hluav taws xob cov chaw taws teeb, thiab cov qauv ntsuas hluav taws xob, thiab ua kom muaj ultra-precision. Tus yuam sij ntawm kev ua tiav, zoo li yoog cov pob khawm, ncaj qha cuam tshuam cov yam ntxwv zoo thiab muab qhov tseeb ntawm qhov kawg. Yog li ntawd, cov kev tshawb fawb dav dav tau ua rau nkag siab txog qhov hloov tau ntawm pob taws kom haum. Daim ntawv no aim rau kev kawm txog txoj kev ncaj loj ntawm txoj kev ncaj sib luag sib npaug, txheeb xyuas nws cov tsis sib xws, thiab muab cov laj thawj zoo rau lawv cov qauv thiab kev ua haujlwm zoo.

Yooj taus matrix ntawm txoj kev ncaj lub nqaj sib luag zom tes taw hinges:

Txoj kev ncaj lub nqaj sib npaug ntawm cov pob khawm sib npaug muaj cov qauv nqaj nqaj nrog cov sib npaug ntawm cov pob khawm ntawm cov pob khawm sib npaug. Lub ntsiab lus geometric tseem ceeb suav nrog khawm qhov siab (h), pob khawm ntev (t), thiab pob khawm fillet voj (r). Txhawm rau txheeb xyuas qhov hauv-dav hlau deformation ntawm pob khawm, ib qho kev ntsuas kev xam cov txheej txheem raws li lub cantilevever nqaj lub tswv yim yog muab tau. Cov qauv no tsim lub voj voos kaw-lub voj anevalical rau cov qauv hauv-dav hlau yooj yim ntawm lub pob khawm hloov tau yooj yim. Txuas ntxiv, ib qho yooj yim muab cov mis rau qhov yooj yim latrix yog muab thaum cov kev sib piv ntawm lub tshuab raj ntawm kaum lub voj voog rau tuab (R / T) tau muab.

Finite keeb kwm theem:

Txhawm rau siv cov qauv tshuaj uas tau muab tau los ntawm cov qauv ncaj qha, tus qauv zoo ntawm txoj kev ncaj lub pob khawm sib npaug siv ulgx nastran software. Kev simulation cov txiaj ntsig ntawm tus qauv zoo tshaj plaws yog muab piv nrog cov txiaj ntsig kev tawm tsam ntawm qhov yooj yim hloov kho matameters. Qhov txheeb ze sib npaug ntawm ob yog tshuaj xyuas rau kev sib txawv sib txawv hauv pob khawm, xws li qhov sib piv ntawm cov khawm khawm kom tuab (r / t).

Qho kawg:

Kev tsom xam pom tias rau L / t piv ntau dua lossis sib npaug ntawm 4, qhov txheeb ze ntawm kev ntsuas thiab simulated tseem ceeb ntawm qhov yooj yim latrix yog nyob rau hauv 5.5%. Txawm li cas los xij, rau l / t sib piv tsawg dua 4, qhov txheeb ze yuam kev yog qhov loj me ntsis rau qhov tsis muaj peev xwm los ua kom yooj yim lub cantilever nqaj mus rau ib lub nqaj nqaim. Qhov no qhia tau tias lub voj kaw-lub voj analytical qauv yog qhov tsim nyog rau LOJ LOJ LOJ.

Hais txog qhov sib piv r / t, kev tsom xam pom tias thaum 0.1 ≤ 0.5, cov txheeb ze tau yuam kev ntawm cov analytical thiab simulated tseem ceeb tuaj yeem tswj hwm tsis pub dhau 9%. Ib qho ntxiv, thaum 0.2 ≤ R / T ≤ 0.3, qhov txheeb ze yuam kev tuaj yeem tswj tsis pub dhau 65%. Cov kev tshawb pom tau ua rau pom tseeb thiab muaj kev yeem ntawm lub voj voos uas kaw-lub voj analytical qauv rau cov qauv hloov zuj zus.

Lub kaw-lub voj analytical qauv tsim nyob rau hauv txoj kev kawm no muab kev ntseeg siab rau kev tsim qauv thiab kev txhim kho ntawm txoj kev ncaj lub nqaj sib npaug khawm. Kev ntsuas pom tau hais tias tus qauv tuaj yeem twv xyuas tau cov kev twv xyuas qhov tseeb thaum txiav txim siab hloov pauv hauv pob khawm ntev, tuab, thiab lub ces kaum. Cov kev tshawb pom no yuav pab txhawb kev nce qib ntawm kev ua tiav cov txheej txheem thiab lawv cov ntawv thov hauv cov khoom siv ntsuas.