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referring to thread384-444725 about diesel enine frequency spectrum

thread384-456076

referring to thread384-444725 about diesel enine frequency spectrum

referring to thread384-444725 about diesel enine frequency spectrum

(OP)
Hi,
I am trying to analyze hydraulic pressure frequency spectrum of a system driven by a diesel engine (V12, 4 stoke). I almost exactly see the frequency activity around 110-130 Hz as the picture in thread384-444725: Frequency from diesel engine that is also about diesel engine. I am wondering it is coming from engine or not? if so, I am sure it is not fundamental frequency. The rpm is almost 2000 and fundamental should be 200 Hz. However, I do not see that in frequency spectrum.
Thanks,

RE: referring to thread384-444725 about diesel enine frequency spectrum

(OP)
True. All pumps frequencies are detected. However, I see no evidence of engine frequency in the spectrum.

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