Cable Tais Load

Cable tais load yog muab faib ua static load, dynamic load thiab ntxiv load.
Static load yog hais txog hom, tus naj npawb thiab sab nraud qhov hnyav / chav tsev ntev ntawm cov cables nteg nyob rau hauv lub tais cable, uas tau teev tseg thiab suav raws li cov kev sib txawv ntawm kev tso cable.
Dynamic load yog hais txog qhov hnyav ntawm kev tsim kho thiab kev saib xyuas cov neeg ua haujlwm thaum lub sijhawm teeb tsa thiab kev saib xyuas ntawm lub tais cable. Rau lub teeb cable tais, dynamic load feem ntau tsis suav hais tias yog, cov neeg tsis raug tso cai sawv (taug kev) ntawm tus choj. Yog tias yuav tsum tau sawv ntsug, qhov ncua yuav tsum raug txo kom tsim nyog.
Kev thauj khoom ntxiv tsuas yog hais txog kev thauj khoom uas tsim los ntawm dej khov, daus, cua thiab hluav taws xob hluav taws xob sab nraum zoov. Nws muaj feem xyuam rau cov xwm txheej ntuj huab cua ntawm thaj chaw uas qhov chaw teeb tsa nyob thiab cov khoom ntawm lub cev raug them. Nws yuav tsum raug xam raws li ntau yam kev mob hauv kev tsim.
Expansion thiab contraction teeb meem
Vim qhov kev hloov pauv ntawm qhov kub thiab txias, cov tais steel hlau yuav nthuav dav thiab cog lus nrog cua sov. Sab nraum zoov cable tais raug cuam tshuam los ntawm qhov kub thiab txias. Piv txwv li, yog tias qhov kub siab tshaj plaws ambient yog 40 degree thiab qhov kub qis tshaj yog -20 degree, qhov siab tshaj plaws contraction ntawm cable tais yog xam raws li nram no:
Δt=11.2 × 10-6 × 60 ° (degrees) × 1000mm
Los ntawm qhov no, peb tuaj yeem xaus tias:
Thaum qhov kub sib txawv yog 60 degree, Δι =0.672mm / m
Thaum qhov kub sib txawv yog 50 degree, Δι =0.560mm / m
Thaum qhov kub sib txawv yog 40 degree, Δι =0.448mm / m
Hauv kev tsim qauv engineering, cov pob qij txha txuas ntxiv yuav tsum tau txiav txim siab rau cov tais kab ncaj nraim. Qhov sib nrug ntawm expansion pob qij txha yog pom zoo kom txiav txim raws li nram no:
Thaum qhov kub sib txawv yog 40 degree, nws yog 50m;
Thaum qhov kub sib txawv yog 50 degree, nws yog 40m;
Thaum qhov kub sib txawv yog 60 degree, nws yog 40m;