Qhov hnyav ntawm tooj liab tau xaj los rau kev suav txheej tsis muaj kev hloov dua siab tshiab: thaj tsam ntawm ntu * 8,89=kg / km xws li 120 square millimeter xam: 120 * 8.89=1066.8kg / km
1. Tus nqi ntawm cov neeg xyuas pib: (Kg / Km)=d ^ 2 * 0.7854 * G * N * K1 * K2 * C /
d=tooj liab hlau xov G=tooj liab tshwj xeeb nqus N=tus naj npawb xov hlau K1=tooj liab tooj liab xaim qhov ncaj qha K2=tub ntxhais xov hlau xaim hlua C=tus naj npawb ntawm cov xov hlau
2. Rwb thaiv tsev ntau npaum li cas: (Kg / Km)=(D ^ 2-d ^ 2) * 0.7854 * G * C * K2 D=rwb thaiv txheej sab nrauv d=tus qauv sab nrauv diam G=rwb thaiv tsev tshwj xeeb nqus K2=tub ntxhais hlau xov xwm kaw=Tus naj npawb ntawm cov kab hlau tsis muaj hlau
3. Qhov ntau ntawm cov npog sab nraud: (Kg / Km)=(D1 ^ 2-D ^ 2) * 0.7854 * G D1=cov txheej txheem sab nraud tiav D=sab txheej txheem sab nraud txoj kab txiav G=rwb thaiv tsev kev nqus
4. Tus nqi ntawm strapping: (Kg / Km)=D ^ 2 * 0.7854 * t * G * ZD=txheej sab nraud ntawm cov txheej txheem sab sauv t=pluaj tuab G=pluaj lub nqus ntxig Z=sib tshooj tus nqi (1 / 4Lap=1.25 )
5. Tus nqi ntawm cov winding: (Kg / Km)=d ^ 2 * 0.7854 * G * N * Z d=tooj liab hlau xov tooj N=tus xov hlau G=kev nqus z=Zuj sib nrawm
6. Knitting nqi: (Kg / Km)=d ^ 2 * 0.7854 * T * N * G / cos θ θ=atan (2 * 3.1416 * (D + d * 2)) * ntxaij tooj / 25.4 / T d=Cov tooj liab xaim tooj liab T=tus ntxaiv N=tus naj npawb ntawm ntxaiv G=kev nqus ntawm tooj liab
Lub ntiajteb txawj nqus tshwj xeeb: Tooj -8,89; Nyiaj-10.50; Aluminium-2.70; Zinc-7.05; Npib tsib xee-8.90; Tin-7.30; Hlau-7.80; Lead-11.40; Aluminium ntawv ci Mylar-1.80; Ntawv-1.35; Mylar-1.37 PVC- 1.45; LDPE-0.92; HDPE-0.96; PEF (ua npuas dej) -0.65; FRPE-1.7; Teflon (FEP) 2.2; Nylon-0.97; PP-0.97; PU-1.21
Cov paj rwb ntaub nplaum -0.55; PP hlua -0.55; paj rwb xov -0.48
Cov ntaub ntawv uas tsis yog tus neeg xyuas pib
1. Sheath thickness: sab nraud txoj kab uas hla ua ntej extrusion × 0.035+1 (raws li lub zog hluav taws xob, cov nominal tuab ntawm tib-ntxhais cable sheath yuav tsum tsis pub tsawg dua 1.4mm, thiab nominal thickness ntawm cov tub ntxhais sib txuas cable yuav tsum tsis txhob tsawg dua 1.8 hli)
2. Kev ntsuas hauv online ntawm sheath thickness: sheath thickness=(periphery tom qab nyem qhov sheath-puag ncig ua ntej nyem lub hnab riam) / 2 π lossis sheath thickness=(puag ncig tom qab muab cov hnab riam-ua ntej nyem lub hnab riam) ua ntej × 0.1592
3. Cov pob khoom thinnest ntawm rwb thaiv tsev thickness: tus nqi nominal × 90% -0.1
4. Qhov kis tau yooj yim ntawm cov tsis muaj armored tiv thaiv sheath: tus nqi nominal × 85% -0.1
5. Lub thinnest point ntawm cov cuab yeej tiv thaiv lossis daim npog thaiv: nominal muaj nqis value 80% -0.2
6. Lub taub hau rau cov hlau muaj hlau: Cov xov tooj ntawm lub xaim={π × (txoj kab uas hla sab hauv ntawm cov kab xev sab hauv + taub hau hlau)} Lub cev hlau xov × λ) hnyav ÷ (kom muaj nuj nqis=π × cov xov hlau xov& sup2; × × L × tus lej ntawm cov xaim xaim ×
7. Qhov hnyav ntawm rwb thaiv tsev thiab sheath=π × outer (lub taub sab nraud ua ntej extrusion + tuab) × tuab × L × ρ
8. Qhov hnyav ntawm txoj hlua steel = {π × (sab nraud txoj kab uas hla ua ntej wra++2 × thickness-1) × 2 × thickness × ρ × L} / (1+K)
9. Qhov hnyav ntawm daim kab xev = {π × (sab nraud txoj kab uas hla ua ntej qhwv {{1}} tus naj npawb ntawm cov khaubncaws sab nraud × tuab) × tus lej txheej layers tuab × ρ × L / (1 ± K) qhov twg: K yog tus nqi sib tshooj lossis tus nqi sib txawv, yog tias Nws yog Overlap, nws yog 1-K; yog tias nws muaj qhov sib txawv, nws yog 1+K; ρ yog qhov tshwj xeeb nqus ntawm cov khoom siv; L yog cable ntev; λ yog cov kauj uas ua kom dim
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