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Date: | Thu, 8 May 2008 13:00:21 -0400 |
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Dan
A great deal of work was done by Bell Laboratories in the 70's on this
issue. Essentially, the procedure developed was to build a structure with
the same same similarity structural parameters as the product or if possible
use the actual product. Then subject the test specimen to a random vibration
spectrum that had the same power spectrum as the actual environment.
Obviously, this is not a back of the envelope, hand waving analysis, but if
you want a serious analysis that can be relied upon, you have some work to
do. There are several good books on the random vibration of plates. I would
start there.
Best regards
Lee
J. Lee Parker, Ph.D.
JLP Consultants LLC
804 779 3389
----- Original Message -----
From: "Dan Skweres" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, May 08, 2008 10:03 AM
Subject: [TN] deflection data???
Good day all!
I have received an inquiry from a customer regarding deflection data. They
want to know if there's any data they can input so they can simulate if
their BGAs will be ejected off their PCBs in a high vibe environment. The
PCB is a 14 layer FR-4 .062 thick. Any guidance would be greatly
appreciated.
Thanks,
Dan S.
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