what the quality engineer needs to know about vibration testing part1of3
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What the Quality Engineer y gneeds to know about Vibration Testing
Part 1 of 3Part 1 of 3
Wayne Tustin©2011 ASQ & Presentation Wayne Tustin
Presented live on Sep 06th, 2011
http://reliabilitycalendar.org/The_Reliability Calendar/Short Courses/Shliability_Calendar/Short_Courses/Short_Courses.html
ASQ Reliability DivisionASQ Reliability Division Short Course SeriesShort Course SeriesThe ASQ Reliability Division is pleased to present a regular series of short courses
featuring leading international practitioners, academics and consultantsacademics, and consultants.
The goal is to provide a forum for the basic andThe goal is to provide a forum for the basic and continuing education of reliability
professionals.
http://reliabilitycalendar.org/The_Reliability Calendar/Short Courses/Shliability_Calendar/Short_Courses/Short_Courses.html
What the Quality Engineer needs to know about Vibra7on
Wayne Tus7n Equipment Reliability Ins7tute
Santa Barbara, California www.equipment-‐reliability.com
805-‐564-‐1260 September 6, 2011
Wayne’s 2005 text
Figure 1-4 Naval Helicopter in Flight
courtesy US Navy
Figure 14-18 “Four Poster” Shaking for Buzz, Squeak and Rattle Investigation
Figure 1 Resonance can be Fun!
Courtesy Fotosearch
forcing frequency ff
natural frequency fn
ff = fn
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Make sure your designers
DON’T STACK THEIR RESONANCES!
Resonances?
Natural frequencies?
What is Wayne talking about?
Figure 2
Figure 7
Video Clip 10-5 Second Mode Bending
Figure 8 Stroboscopic light
courtesy Monarch Instrument
Video Clip 10-6 Second Mode, with Strobe
Video Clip 10-7 Sprinkling Salt to Identify Nodes
Video Clip 10-8 Salt Migrates to Two Nodes
Video Clip 10-9 Arrows Identify Nodes
Video Clip 10-10 More Salt, Seeking More Resonances
Video Clip 10-11 Three Nodes means Resonance #4
Video Clip 10-12 More Salt, Seeking More Resonances
Figure 10 8 Nodes, 9th Mode
Video Clip 20-6 Detroit Street
Figure 10 Card Cage
courtesy John Starr
Animation 10-1
Figure 11 Underneath a chip
In service, don’t let it receive much excita7on at 174, 258 or 341 Hz.
DON’T STACK YOUR RESONANCES!
More commonly, your know the fns of your customer’s hardware.
If you don’t know, ask him.
Tell your PWA designers to avoid those frequencies.
Shake test the PWA.
Make sure your designers
DON’T STACK THEIR RESONANCES!
courtesy Endevco
Figure 12
Figure 13 Compression Piezoelectric Accelerometer
Figure 14 Data Acquisition Front-end
Courtesy Dewetron America, Inc.
Courtesy Sound & Vibra7on magazine
Figure 15
g2/H
z
frequency - Hz
Figure 16
What the Quality Engineer needs to know about Vibra7on
Wayne Tus7n Equipment Reliability Ins7tute
Santa Barbara, California www.equipment-‐reliability.com
805-‐564-‐1260
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