Ityhubhu yesikwere VS ityhubhu yoxande, yeyiphi imilo ehlala ixesha elide?
Umahluko wokusebenza phakathiityhubhu yoxandekwayeityhubhu yesikwerekwizicelo zobunjineli kufuneka zihlalutywe ngokubanzi ukusuka kwiimbono ezininzi zoomatshini njengamandla, ukuqina, ukuzinza, kunye nokuthwala umthamo.
1. Amandla (ukugoba kunye nokuxhathisa i-torsion)
Amandla okugoba:
Ityhubhu yeRectangular: Xa iphantsi komthwalo wokugoba ecaleni kwendlela yecala elide (indlela yokuphakama), umzuzu we-inertia yecandelo likhulu, kwaye ukuxhathisa ukugoba kubhetele kakhulu kunombhobho wesikwere.
Umzekelo, amandla okugoba we-100 × 50mm ityhubhu yoxande kwicala elide liphezulu kunetyhubhu ye-75 × 75mm yesikwere.
Ityhubhu yesikwere: Umzuzu we-inertia uyafana kuzo zonke iinkalo, kwaye ukusebenza kokugoba ku-symmetrical, kodwa ixabiso layo lidla ngokuba lincinci kunelo icala elide letyhubhu ye-rectangular phantsi kwendawo efanayo ye-cross-sectional.
Isiphelo: Ukuba ulwalathiso lomthwalo lucacile (njengesakhiwo se-boam), ityhubhu yoxande ingcono; ukuba ulwalathiso lomthwalo luyahlukahluka, ityhubhu yesikwere ilungelelene ngakumbi.
Amandla eTorsion:
I-torsion constant ye-square ityhubhu iphezulu, ukusabalalisa uxinzelelo lwe-torsion kufana ngakumbi, kwaye ukuxhatshazwa kwe-torsion kungcono kunombhobho wexande. Umzekelo, ukuxhathisa kwe-torsion ye-75 × 75mm yesikwere ityhubhu yomelele kakhulu kune-100 × 50mm ityhubhu yoxande.
Isiphelo: Xa umthwalo we-torsional ulawula (njenge-shaft yokuhambisa), iibhubhu zesikwere zingcono.
2. Ukuqina (i-anti-deformation isakhono)
Ukugoba ukuqina:
Ukuqina kuhambelana nomzuzu we-inetia. Iityhubhu ezixande zinobunzima obuphezulu kwicala elide, elilungele iimeko ezifuna ukuxhathisa ukuphambuka kwe-unidirectional (njengemiqadi yebhulorho).
Iityhubhu zesikwere zine-symmetrical bidirectional stiffness kwaye zifanelekile kwimithwalo ye-multidirectional (njengeekholomu).
Ukuqukumbela: Iimfuno zokuqina zixhomekeke kwicala lomthwalo. Khetha iityhubhu ezixande kwimithwalo engafaniyo; khetha iityhubhu zesikwere kwimithwalo ye-bidirectional.
3. Uzinzo (ukumelana ne-buckling)
Ukudibanisa indawo:
Iityhubhu ezixande zidla ngokuba nomlinganiselo omkhulu wobubanzi ukuya kubukhulu, kwaye iindawo ezinodonga olucekethekileyo ziqhelene kakhulu nokubophana kwendawo, ngakumbi phantsi koxinzelelo okanye imithwalo yokucheba.
Iityhubhu zesikwere zinozinzo olungcono lwendawo ngenxa ye-symmetrical cross-section.
Ukubopha kukonke (i-Euler buckling):
Umthwalo we-buckling unxulumene ne-radius encinci ye-gyration ye-cross-section. I-radius ye-gyration yeetyhubhu zesikwere iyafana kuzo zonke iinkalo, ngelixa i-radius ye-gyration yeetyhubhu ezixande kwicala elifutshane lincinci, okwenza ukuba bathande ukukhwela.
Isiphelo: Iityhubhu zesikwere zikhethwa kumalungu acinezelayo (njengeentsika); ukuba ulwalathiso olude lwecala lombhobho wexande lunyanzeliswa, lunokuhlawulwa ngokuyila.
4. Ukuthwala umthamo (i-axial kunye nemithwalo edibeneyo)
Uxinzelelo lweAxial:
Umthamo wokuthwala unxulumene nommandla we-cross-sectional kunye ne-slenderness ratio. Ngaphantsi kwendawo efanayo ye-cross-sectional, ii-tubes zesikwere zinomthamo ophezulu wokuthwala ngenxa ye-radius enkulu yokujika.
Umthwalo odibeneyo (uxinzelelo oludibeneyo kunye nokugoba):
Iityhubhu ezixande zinokuthatha ithuba loyilo oluphuculweyo xa ulwalathiso lomzuzu wokugoba lucacile (njengomthwalo othe nkqo kwicala elide); iityhubhu zesikwere zifanelekile kwizihlandlo zokugoba ze-bidirectional.
5. Ezinye izinto
Ukusetyenziswa kwezinto:
Iityhubhu ezixande zisebenza ngakumbi kwaye zigcina izinto xa ziphantsi kokugoba unidirectional; iityhubhu zesikwere zinoqoqosho ngakumbi phantsi kwemithwalo ye-multi-directional.
Uncedo loqhagamshelo:
Ngenxa ye-symmetry yeetyhubhu zesikwere, ukudibanisa i-node (njenge-welding kunye ne-bolts) kulula; iityhubhu eziluxande kufuneka zithathele ingqalelo indlela.
Iimeko zesicelo:
Iityhubhu ezixande: imiqadi yokwakha, iingalo zecrane, i-chassis yesithuthi (indlela ecacileyo yomthwalo).
Iityhubhu zesikwere: iikholomu zokwakha, iitrasi zendawo, iifreyimu zoomatshini (imithwalo ye-multi-directional).
Ixesha lokuposa: May-28-2025
