×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Is it possible to compare Random response data with Frequency Response

Is it possible to compare Random response data with Frequency Response

Is it possible to compare Random response data with Frequency Response

(OP)
i have two sets of data: 1) Random PSD g^2/hz data from a test we ran and 2)  frequency response data from the manufacturer (i.e. acceleration versus frequeny). Is it possible to compare these two to see if over testing was done?  

RE: Is it possible to compare Random response data with Frequency Response

Quote:

frequency response data...

would normally be output/input vs. frequency.  Are you sure about what you have in 2) above?

RE: Is it possible to compare Random response data with Frequency Response

(OP)
I mean accel versus frequency.  I obtained this data by taking FFT of time domain in-situ manufacturer data from a test where he mounted accels to hard points on the chassis of vehicle.

So now i have two curves.  1)freq./g**2 from random test we ran.  2) freq/g curve from vendor.

Now to compare the two do I just look at what happens at resonance of the part mounted to the chassis (which i make)  and use Miles equation?  Then see which gives the higher loading?

I am sure there I cannot just make a head to head comparison but only look at resonance to see if there was an overtest situation.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources