Gear Noise and Vibration Episode 2 Part 4 pps

... 5*cos(1 .44 88 -(i-l)*0.1); yl(i) - 40 .7 84 - 5*sin(1 .44 88 -(i-l)*0.1); end fori=16:N; % involute ra = (i-16)*0. 02; xl(i) =40 .7 84* (sin(raHi-16)*0. 02* cos(ra)); yl(i) =40 .7 84* (cos(ra)+(i-16)*0. 02* sin(ra)); end for ... i=(N+l) :2* N ; % Image in x=0 other flank x2(i) = - xl (2* N+l-i); y2(i) - yl (2* N+l-i); rot 1=0 .45 413; xl(i) =x2(i)*cos(rotl) +y2(i)...

Ngày tải lên: 05/08/2014, 09:20

... 5*cos(1 .44 88 -(i-l)*0.1); yl(i) - 40 .7 84 - 5*sin(1 .44 88 -(i-l)*0.1); end fori=16:N; % involute ra = (i-16)*0. 02; xl(i) =40 .7 84* (sin(raHi-16)*0. 02* cos(ra)); yl(i) =40 .7 84* (cos(ra)+(i-16)*0. 02* sin(ra)); end for ... i=(N+l) :2* N ; % Image in x=0 other flank x2(i) = - xl (2* N+l-i); y2(i) - yl (2* N+l-i); rot 1=0 .45 413; xl(i) =x2(i)*cos(rotl) +y2(i)...

Ngày tải lên: 05/08/2014, 09:20

... intermittent, random, or irregular vibration will behave like random vibration and average to zero. Even powerful vibration such as engine inertia and firing effects from a 4- cylinder ... a readout of -20 dB on Ivolts 2 /Hz with a total bandwidth of 10,000 Hz and 40 0 lines in the spectrum. Each "line" is 25 Hz wide and the power is...

Ngày tải lên: 05/08/2014, 09:20

... alt="" Low Contact Ratio Gears 22 5 100 20 0 300 40 0 500 Fig 14 .2 Seven tooth gear meshing with rack. These highly loaded jacking gears work extremely slowly so noise is not a problem ... (brl*psil - brl*tan(phi2))/(pi*cos(phio)); r2 = (br2*psi2 - br2*tan(phi2))/(pi*cos(phio)); conratio = rl + r2; disp( f angle rl r2 contact ratio') disp([ phi2 rl r2 conr...

Ngày tải lên: 05/08/2014, 09:20

... 15 20 25 Steps of 1/16 of one tooth mesh 30 35 Fig 4. 10(b) Predicted static T.E. result for 10 |jm misalignment. 44 Chapter 4 Tooth with helix correction and end relief Fig 4. 6 ... on Vibration in Rotating Systems, I. Mech. E., London, Feb. 19 72, p 25 . 3. Matlab The Math Works Inc., Cambridge Control, Jeffrys Building, Cowley Road, Cambridge...

Ngày tải lên: 05/08/2014, 09:20

... rotation at the (narrow) gear of 0.1 F deflected shape Fig 4. 13 Tilting of gear due to helical axial forces. 44 Chapter 4 Tooth with helix correction and end relief Fig 4. 6 Different helix ... on Vibration in Rotating Systems, I. Mech. E., London, Feb. 19 72, p 25 . 3. Matlab The Math Works Inc., Cambridge Control, Jeffrys Building, Cowley Road, C...

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 ... a readout of -20 dB on Ivolts 2 /Hz with a total bandwidth of 10,000 Hz and 40 0 lines in the spectrum. Each "line" is 25 Hz wide and the p...

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., &apos...

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 ... car gearbox may require loaded T.E. to be less than 3 um in 5th, 5 um in 4th, 2 urn in 3rd (because of a particular difficult resonance), 7 um in 2nd and 12 um in 1s...

Ngày tải lên: 05/08/2014, 09:20

... equations and take 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/ r2 2 ] (s2r2-slr2-te) = - F23 [I3/r3 2 ] (A3.r3) + [D3/r3 2 ] (V3 r3) + [D 34/ r3 2 ] (V3r3-V4r3) + [k 34/ r3 2 ] (s3r3-s4r3)...

Ngày tải lên: 05/08/2014, 09:20