27_ch 13 Mechanical Design budynas_SM_ch13

27_ch 13 Mechanical Design budynas_SM_ch13 - µ r bP d P 2...

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Chapter 13 359 Proper center-to-center distance : C = d P + d G 2 = 2 . 083 33 + 2 . 104 17 2 = 2 . 093 75 in r bP = r cos φ = 2 . 0833 2 cos 20 = 0 . 9788 in 99:100 Mesh d P = 99 48 = 2 . 0625 in d G = 100 48 = 2 . 083 33 in Proper : C = 99 / 48 + 100 / 48 2 = 2 . 072 917 in r bP = r cos φ = 2 . 0625 2 cos 20 = 0 . 969 06 in Improper : C = d P + d G 2 = d P + (100 / 99) d P 2 = 2 . 093 75 in d P = 2(2 . 093 75) 1 + (100 / 99) = 2 . 0832 in φ = cos 1 r bP d P / 2 = cos 1 0 . 969 06 2 . 0832 / 2 = 21 . From Ex. 13-1 last line
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Unformatted text preview: µ r bP d P / 2 ¶ = cos − 1 · ( d P / 2) cos φ d P / 2 ¸ = cos − 1 · ( N P / P ) cos φ (2 C / (1 + m G )) ¸ = cos − 1 · (1 + m G ) N P cos φ 2 PC ¸ Ans . 13-45 Computer programs will vary....
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