Your SlideShare is downloading. ×
  • Like
Isolation eng
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×

Now you can save presentations on your phone or tablet

Available for both IPhone and Android

Text the download link to your phone

Standard text messaging rates apply

Isolation eng

  • 244 views
Published

 

  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
    Be the first to like this
No Downloads

Views

Total Views
244
On SlideShare
0
From Embeds
0
Number of Embeds
0

Actions

Shares
Downloads
21
Comments
0
Likes
0

Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide

Transcript

  • 1. VIBRATIONISOLATION
  • 2. CONTENTSVIBRATION ISOLATION : WHY ? HOW TO MODEL THE PROBLEM ? WHAT IS RESONANCE ? WHAT TO USE ? HOW TO CHOOSE A SPRING ?
  • 3. WHY ?VIBRATIONS CAN BE A PROBLEM FOR :-THE MACHINE ITSELF-THE ENVIRONMENTTO MINIMIZE THE PROBLEM OF VIBRATIONS :DESIGN OF A VIBRATION ISOLATION SYSTEM
  • 4. HOW TO MODEL THE PROBLEM ? ACTIVE ISOLATION : F FT OR PASSIVE ISOLATION : X
  • 5. WHAT IS RESONANCE ?RESONANCE : tendency of a system tooscillate with larger amplitude at somefrequencies than at others. RESONANT FREQUENCIES
  • 6. WHAT TO USE ? dampers spring boxes aircushionsEvery isolation system canbemodeled by a spring and a damper. Here, wewillconsideronly the spring constant.
  • 7. HOW TO CHOOSE A SPRING ? COMPARISON BETWEEN :- F : FREQUENCY OF THE STRUCTURE- FO : RESONANT FREQUENCY OF THESPRINGIF F > FO : AMPLIFICATION OFTHE VIBRATIONSIF F = FO : RESONANCEIF F > FO : ABSORPTION OFVIBRATIONS IF F > 4 FO : T < 0,1
  • 8. CONCLUSION TO DESIGN A VIBRATION ISOLATION SYSTEM :DETERMINATION OF THE FREQUENCY F OF THE MACHINERESONANT FREQUENCY OF THE SPRING FO = F/5STIFFNESS K OF THE SPRING : FO =M = mass of the machine