Chap12-1 - 9-3 kN C0 C0 S 0 P0 P0 = X 0R Y0 A 9-7 7312AC C=77.8 kN R 1 = 1800N n = 3000r min R 2 = 4200 N Fa = 1000N A >e X=0.41,Y=0.87 R S = 0.68

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§9-3 滚滚滚滚滚滚滚滚滚滚 滚滚滚滚滚滚滚滚滚滚 滚滚滚滚 - - - 滚滚滚滚 - - - 滚滚滚滚滚 滚滚滚滚滚 滚滚 滚滚滚滚滚 滚滚滚滚滚 滚 kN 0 C 0 0 0 P S C A Y R X P 0 0 0 + = 滚滚滚滚滚 滚滚滚滚滚
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滚 9-7 滚滚滚滚滚滚滚滚 7312AC 滚滚滚滚滚滚滚滚滚 滚滚 滚滚滚滚滚 滚滚滚滚滚 C=77.8 kN C=77.8 kN , 滚滚滚 , , 滚滚滚滚 S = 0.68 R 滚 e = 0.68 , 滚 滚滚 X=0.41,Y=0.87 滚滚滚滚滚滚 =1.2 滚滚滚滚滚 滚滚滚滚滚滚 min / r 3000 n = N 1800 R 1 = N 4200 R 2 = N 1000 F a = e R A 1 R a F 2 R p f
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1 滚滚 S N 2856 R 68 . 0 S N 1224 R 68 . 0 S 2 2 1 1 = = = = 1 R a F 2 R 滚滚滚滚 1 S 2 S 2 滚滚 A 1 2 a S N 3856 2856 1000 S F = + = + N 3856 F S A a 2 1 = + = N 2856 S A 2 2 = = 滚滚 2 滚滚滚 滚滚 1 滚滚滚
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3 滚滚 P e 1 . 2 1800 3856 R A 1 1 = = , 87 . 0 Y , 41 . 0 X 1 1 = = N 4911 ) 3856 87 . 0 1800 41 . 0 ( 2 . 1 ) A Y R X ( f P 1 1 1 1 p 1 = × + × = + = e 68 . 0 4200 2856 R A 2 2 = = = , 0 Y , 1 X 2 2 = = N 5040 4200 2 . 1 R 2 . 1 ) A Y R X ( f P 2 2 2 2 2 p 2 = × = = + =
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4 滚滚 h L N 5040 P 2 = N 4911 P 1 = 滚滚滚滚滚滚 P 滚滚滚滚滚 滚滚 滚滚滚滚滚 ε = 2 h P C n 16667 L = ε
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This note was uploaded on 10/15/2011 for the course ME 209 taught by Professor Yaolu during the Winter '09 term at Tsinghua University.

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Chap12-1 - 9-3 kN C0 C0 S 0 P0 P0 = X 0R Y0 A 9-7 7312AC C=77.8 kN R 1 = 1800N n = 3000r min R 2 = 4200 N Fa = 1000N A >e X=0.41,Y=0.87 R S = 0.68

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