... ltt/rmin= 330/(0,289 .16 )= 71, 4. Hệ số mômen phụ: 47,0 13 0 .18 .16 . 310 0 12 000.4, 71 1 310 0 1 22=−=−=nngRANλξ 22 /13 013 0 .1. /12 8 15 0.768.47,0 13 0 .18 000 18 .16 12 000..cmkgRmcmkgRWRMANnnuthnth==<=+=+=→ξσ ... Tema= 80ad=80.8 .1, 8= 11 52kg; Temc=50cd=50 .12 .1, 8 =10 80 kg; Tu =18 0d2+2a2 =18 0 .1, 82+2.82= 711 kg< 250d2=250 .1, 82= 810 kg. Vậy Tmin= min (11 52 ,10 80, 711 )= 711 kg. Số lượng ... uuxxmRtgkWM+ ) .1( ctuuxxWcm,),,(,)tg.k(mRMW ==ì+ì=+3 12 97460 211 15 112 026 418 1 cm,,,kWhx 912 1297 216 633=ìì== b = 12 ,9 / 1, 2 = 10 ,75cm Chọn h = 14 cm, b = 12 cm. Tớnh cỏc...