13.07.2015 Views

VAJA 2 - Student Info

VAJA 2 - Student Info

VAJA 2 - Student Info

SHOW MORE
SHOW LESS
  • No tags were found...

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Elektroenergetski elementi - vaje1.0. Specifična teža vrvi (γ) :Podatki iz tabele:γ Al = 0,027 N/mm 2 mγ Fe = 0,078 N/mm 2 mUporabljena vrv: Al/Je 490/65 mm 2Prerezno razmerje:η =AAAlFe=49065= 7,54γAlη+ γFeγ = = 0,032971+ηN/mm 2 m1.1. Modul elastičnosti (E) :Podatki iz tabele : E Fe = 180000 N/mm 2E Al = 56000 N/mm 2EFe+ η EAlskupni modul : E = = 696401+ηN/mm 21.2. Temperaturni razteznostni koeficient (α) :−6Podatki iz tabele: α Al = 23 ⋅ 10 1/ ° K−6α Fe = 11⋅ 10 1/ ° Kα E + α E η= ,E( 1+η )Fe Fe Al Al−6α = 19 37 ⋅101/ ° K1.3. Koeficiente γ, E in α lahko določimo tudi iz priložene tabeleγ = 0,0336 N/mm 2 mE = 70000 N/mm 2−6α = 19,40 ⋅ 10 1/ ° KV nadaljevanju bodo uporabljeni podatki iz tabele!1.4. Dodatno zimsko breme:A = A Al+ A Je0,2γD= = 0,0175 N/mm 2 m3A 4celotna specifična teža: γ = γ + γ = 0,0511 N/mm 2 mCDAvditorne vaje <strong>VAJA</strong> 2

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!