Gear Noise and Vibration Episode 2 Part 6 ppt

... the pinion at position 2. So 8, = Fpi, + Fp 12 and 5 2 = Fp 12 + Fp 22 . As the transmission error is the sum of 81 and S 2 T.E. = F(p n +2p, 2 + p 22 ) giving F. Once F ... in Fig. 16. 3 and then add the results and the estimates of the tooth effects as discussed in section 16. 6. 16 .2 Hydraulic vibrators As electromagnetic vibrators...

Ngày tải lên: 05/08/2014, 09:20

... the pinion at position 2. So 8, = Fpi, + Fp 12 and 5 2 = Fp 12 + Fp 22 . As the transmission error is the sum of 81 and S 2 T.E. = F(p n +2p, 2 + p 22 ) giving F. Once F ... in Fig. 16. 3 and then add the results and the estimates of the tooth effects as discussed in section 16. 6. 16 .2 Hydraulic vibrators As electromagnetic vibrators...

Ngày tải lên: 05/08/2014, 09:20

... acceleration output is about 101 mV/pC x 25 pC/g or 25 00 mV/g acceleration and so 25 0 mV per m s" 2 and the velocity sensitivity is then 25 0 mV per mm s" 1 . At the other ... of rotation frequency. B 2/ tooth 3/tooth frequency Fig 6. 6 Sketch of responses to T.E. excitation as tooth frequency varies. Measurements 81 20 0 pF F303-99 36...

Ngày tải lên: 05/08/2014, 09:20

... internal and external resonances by measuring the bearing vibrations and the noise simultaneously. This gives T.E. to bearing vibration as well as bearing vibration to noise. Whether ... a car engine and gearbox, the supports to take the torque reaction may be spaced 1 m apart and at a full engine torque of 20 0 N m with 4:1 first gear ratio...

Ngày tải lên: 05/08/2014, 09:20

... revolutions and divide the resulting totals by 25 6, our scale factor is unaltered and we have obtained an average vibration. 1 46 Chapter 9 ampl background noise lines frequency Fig 9 .6 ... non-synchronous, intermittent, random, or irregular vibration will behave like random vibration and average to zero. Even powerful vibration such as engine inert...

Ngày tải lên: 05/08/2014, 09:20

... result is a small amplitude random "white noise& quot; vibration. Analysis Techniques 149 1 0.8 0 .6 0.4 0 .2 0 -0 .2 -0.4 -0 .6 -0.8 -1 6 8 window length L 10 12 Fig 9.7 Finite length records ... non-synchronous, intermittent, random, or irregular vibration will behave like random vibration and average to zero. Even powerful vibration such as engine ine...

Ngày tải lên: 05/08/2014, 09:20

... as 2 jim rms the expected value of a low harmonic will be as high as 2V (2/ 32) which is 0.5 urn rms or 1.4 um p-p. 2. 5 V-1.5 10 20 30 40 50 harmonics of 1/rev 60 70 Fig 9 .20 ... contact. References 1. Newland, D.E.N., 'Random vibrations, spectral and wavelet analysis.' Longman, Harlow, UK and Wiley, New York, 1993. 2. Randall, R.B., '...

Ngày tải lên: 05/08/2014, 09:20

... as 2 jim rms the expected value of a low harmonic will be as high as 2V (2/ 32) which is 0.5 urn rms or 1.4 um p-p. 2. 5 V-1.5 10 20 30 40 50 harmonics of 1/rev 60 70 Fig 9 .20 ... contact. References 1. Newland, D.E.N., 'Random vibrations, spectral and wavelet analysis.' Longman, Harlow, UK and Wiley, New York, 1993. 2. Randall, R.B., '...

Ngày tải lên: 05/08/2014, 09:20

... rl=r2 [Il/r2 2 ] (Al.r2) + [Dl/r2 2 ] (VI r2) + [D 12/ r2 2 ] (Vlr2-V2r2) + [k !2/ r2 2 ] (slr2-s2r2+te) - Q/r2 [I2/r2 2 ] (A2.r2) + [D2/r2 2 ] (V2 r2) + [D 12/ r2 2 ] (V2r2-Vlr2) ... -k !2 (sl-s2 +te !2) - D 12 (V1-V2) rearranges to 11 Al + Dl VI + k !2 (sl-s2+te !2) + D 12 (V1-V2) = Q and similarly 12 A2 + D2 V2 - k !2 (sl-s2+te !2) -...

Ngày tải lên: 05/08/2014, 09:20

... rl=r2 [Il/r2 2 ] (Al.r2) + [Dl/r2 2 ] (VI r2) + [D 12/ r2 2 ] (Vlr2-V2r2) + [k !2/ r2 2 ] (slr2-s2r2+te) - Q/r2 [I2/r2 2 ] (A2.r2) + [D2/r2 2 ] (V2 r2) + [D 12/ r2 2 ] (V2r2-Vlr2) ... -k !2 (sl-s2 +te !2) - D 12 (V1-V2) rearranges to 11 Al + Dl VI + k !2 (sl-s2+te !2) + D 12 (V1-V2) = Q and similarly 12 A2 + D2 V2 - k !2 (sl-s2+te !2) -...

Ngày tải lên: 05/08/2014, 09:20