2 - MASINAC.org

More documents

Recommendations

Info

PONAŠANJE BRODA NA TALASIMA____________________________Formula Heridzme i Bukelmana izvedena je podpretpostavkom da brod plovi pramcem karegularnim talasima...Dodatni otpor na neregularnim talasima, možese, na osnovu principa superpozicije, izračunatikaoNΔR= ∑ ΔRn( ωn)n=1Za dodatni otpor na neregularnim talasima,međutim, najčešće se koristi nešto drugačija,integralna formula.Izraz se transformišeΔRn( ωn)2ΔRn( ωn) = ⋅ An( ωn)=2A ( ω )gde je iskorišćenonn2= 2Δr ( ω ) S ( ω ) ΔωΔr( ω ) =nnn n n n pΔRAA ( ω ) = 2S ( ω ) ⋅Δωn n n n pnnDodatni otpor na neregularnimtalasima je tadaN∑n = 12ΔR= 2 Δr ( ω ) ⋅S( ω ) ΔωAkoformula postaje∫n n n n pΔω → dωp∞R = 2 2r (0p) ST( p)⋅dpΔ Δ ω ω ωTo je formula Herizme i Bukelmanaza dodatni otpor broda naneregularnim talasima...Treba naći Δr u funkciji prividnefrekvencije... (igra, na neki način,ulogu prenosne funkcije...)pPREDAVANJA 2009. 171
PONAŠANJE BRODA NA TALASIMA____________________________Primer ukupnog otpora na neregularnimtalasimakontejnerski broda L = 175 m,Sprega ponašanja broda na talasima ipropulzije broda...Potisak propelera u slobodnoj vožnji T prodređuje se iz bezdimenzione karakteristike...TprKT =2 4ρn Dprv A( 1−w) vJ = =oDn DnprprKojom brzinom v o napreduje brod?Potrebno je odrediti potisak propelera T pr ...i naneti ga u dijagram...VažiPresek krivih R i( )T 1− t = RprT ′prT ′prdaje brzinu plovidbe...Pretpostavimo (npr) da motor radi na max.režimu, i da je pri tome n = n MCRZa (pretpostavljenu) brzinu v o ...vo → J → KT →Tpr →T′prsledi tačka u dijagramu...Da li motor može da razvije n MCR ??PREDAVANJA 2009. 172
Page 2 and 3:
PONAŠANJE BRODA NA TALASIMA_______
Page 4 and 5:
Page 6 and 7:
Page 8 and 9:
Page 10 and 11:
Page 12 and 13:
Page 14 and 15:
Page 16 and 17:
Page 18 and 19:
Page 23 and 24:
Page 25 and 26:
Page 27 and 28:
Page 29 and 30:
Page 31 and 32:
Page 33 and 34:
Page 35 and 36:
Page 37 and 38:
Page 39 and 40:
Page 41 and 42:
Page 43 and 44:
Page 45 and 46:
Page 47 and 48:
Page 49 and 50:
Page 51 and 52:
Page 53 and 54:
Page 55 and 56:
Page 57 and 58:
Page 59 and 60:
Page 61 and 62:
Page 63 and 64:
Page 65 and 66:
Page 67 and 68:
Page 69 and 70:
Page 71 and 72:
Page 73 and 74:
Page 75 and 76:
Page 77 and 78:
Page 79 and 80:
Page 81 and 82:
Page 83 and 84:
Page 85 and 86:
Page 87 and 88:
Page 89 and 90:
Page 91 and 92:
Page 93 and 94:
Page 95 and 96:
Page 97 and 98:
Page 99 and 100:
Page 101 and 102:
Page 103 and 104:
Page 105 and 106:
Page 107 and 108:
Page 109 and 110:
Page 111 and 112:
Page 113 and 114:
Page 115 and 116:
Page 117 and 118:
Page 119 and 120:
Page 121 and 122: PONAŠANJE BRODA NA TALASIMA_______
Page 171: PONAŠANJE BRODA NA TALASIMA_______
Page 223 and 224:
Page 225 and 226:
Page 227 and 228:
Page 229 and 230:
Page 231 and 232:
Page 233 and 234:
Page 235 and 236:
Page 237 and 238:
Page 239 and 240:
Page 241 and 242:
Page 243 and 244:
Page 245 and 246:
Page 247 and 248:
Page 249 and 250:
Page 251 and 252:
Page 253 and 254:
Page 255:
show all

2 - MASINAC.org

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?