機械原理 - 考試
By Emma
at 2014-05-30T06:17
at 2014-05-30T06:17
Table of Contents
問題:若要使滾珠軸承之壽命增加一倍,則軸承所受負載約應降低原來的多少倍?
(A)0.14 (B)0.42 (C)0.61 (D)0.79
答案是(D)
老魯,印象中軸承壽命的公式好像是: L2/L1=(P1/P2)^3
假設原本壽命是 L1=1 負載是 P1=1
若要使 L2=2 則 P2=0.793700526 ,故選(D)
感覺似乎有點怪怪的,想請問高手的正確詳解。感謝
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By Kumar
at 2014-06-01T20:15
at 2014-06-01T20:15
By Olga
at 2014-06-02T18:30
at 2014-06-02T18:30
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