>> P.27
ABCDEFGHIJKLM ……………………(19)p0NFm= ∫FndN1Npwhere,Fm:Meanequivalentload,N N:Totalnumberofrevolutions,rev. Fn:Fluctuatingload,N p: Exponent,Rollerbearing=10/3Ballbearing=3MeanequivalentloadcorrespondingtofluctuatingloadtheloadappliedtoWhenthebearingfluctuates,thebearinglifeiscalculatedbyusingthemeanequivalentloadFm,whichthebearingalifeequaltothatproducedunderthefluctu-atingisobtainedfromthefollowingequation:Themeanequivalentisaconstantthatwillgiveload.loadloadTable9showsexamplesofthecalculationofmeanequivalentloadsforvariousfluctuatingloads.Table9MeanequivalentloadforthefluctuationloadTypeoffluctuatingloadMeanequivalentloadFmpp1NFm= (F1N1+F2N2+…+FnNn)pppwhere,N1:TotalnumberofrevolutionsunderloadF1rev.N2:TotalnumberofrevolutionsunderloadF2rev.Nn:TotalnumberofrevolutionsunderloadFnrev.SteploadF1FF2FmN1N2NFnNnA24where,Fmax:Maximumvalueoffluctuatingload,NFmin:Minimumvalueoffluctuatingload,NFm= (2Fmax+Fmin)13FmaxFmNFmFmNFm≒0.65FmaxFm≒0.75FmaxMonotonouslychangingloadFFminNFmaxFFFmaxSinusoidallyfluctuatingloadStationaryloadplusrotatingloadFsFRFm=FS+FR- FSFRFS+FRwhere,FS:Stationaryload,NFR:Rotatingload,N
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