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link 20.02.2015 13:40 |
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Subject: pocket-passing frequency (про компрессор) gen. А вдруг меня кто осчастливит переводом сабжа?.. Пока ничего не нашел сам..If the amplitude of any discrete, non-synchronous vibration, excluding the frequency of the other rotor and its harmonics, exceeds 20 % of the allowable overall vibration as defined in Table 4 or Table 5, or 75 % of the allowable overall vibration in the case of the pocket-passing frequency (PPF) and its harmonics, the purchaser and the vendor shall agree on requirements for any further investigation, which may include additional testing. |
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в помощь "The frequency of the working process is called pocket passing frequency and is calculated by male rotor frequency multiplied by the number of lobes on the male rotor" http://turbolab.tamu.edu/proc/turboproc/T38/ch14_Wennemar.pdf |
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