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Effects of added components on the dynamic modeling of printed circuit boards

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Date Issued:
1994
Summary:
Dynamic modeling of Printed Circuit Boards (PCBs) with mounted components, was investigated via the example of a PC network card by removing components in different stages and examining the resulting effects on the modal properties. Modal test results were compared with those from an ANSYS finite element analysis. Questions considered were: a) Do added components have a significant effect on the modal properties of a PCB and what are the effects ? b) How much variation is there in natural frequencies from board to board and test to test for a single board? c) Can a board with attached components reasonably be modeled as a uniform elastic plate with an "equivalent" density and modulus of elasticity? Results obtained indicate that added components do have significant effects on the board modal properties, less so for the lower modes than for the higher modes. There was only slight variation in the natural frequencies from board to board and from test to test for a single board. For the first two modes of vibration, it was found that the board considered could be modeled as a uniform elastic plate with "equivalent" properties, provided an appropriate value of equivalent elastic modulus was used. General findings, applicable to any PCB design, are presented.
Title: Effects of added components on the dynamic modeling of printed circuit boards.
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Name(s): Vallamattam, Bijoy Kurian.
Florida Atlantic University, Degree grantor
Stevens, Karl K., Thesis advisor
College of Engineering and Computer Science
Department of Ocean and Mechanical Engineering
Type of Resource: text
Genre: Electronic Thesis Or Dissertation
Issuance: monographic
Date Issued: 1994
Publisher: Florida Atlantic University
Place of Publication: Boca Raton, Fla.
Physical Form: application/pdf
Extent: 104 p.
Language(s): English
Summary: Dynamic modeling of Printed Circuit Boards (PCBs) with mounted components, was investigated via the example of a PC network card by removing components in different stages and examining the resulting effects on the modal properties. Modal test results were compared with those from an ANSYS finite element analysis. Questions considered were: a) Do added components have a significant effect on the modal properties of a PCB and what are the effects ? b) How much variation is there in natural frequencies from board to board and test to test for a single board? c) Can a board with attached components reasonably be modeled as a uniform elastic plate with an "equivalent" density and modulus of elasticity? Results obtained indicate that added components do have significant effects on the board modal properties, less so for the lower modes than for the higher modes. There was only slight variation in the natural frequencies from board to board and from test to test for a single board. For the first two modes of vibration, it was found that the board considered could be modeled as a uniform elastic plate with "equivalent" properties, provided an appropriate value of equivalent elastic modulus was used. General findings, applicable to any PCB design, are presented.
Identifier: AAI1356828 (UnM), 15015 (digitool), FADT15015 (IID), fau:11793 (fedora)
Collection: FAU Electronic Theses and Dissertations Collection
Note(s): College of Engineering and Computer Science
Thesis (M.S.)--Florida Atlantic University, 1994.
Subject(s): Modal analysis
Printed circuits--Mathematical models
Printed circuits--Design and construction--Data processing
Electronic systems
Held by: Florida Atlantic University Libraries
Persistent Link to This Record: http://purl.flvc.org/fcla/dt/15015
Sublocation: Digital Library
Use and Reproduction: Copyright © is held by the author, with permission granted to Florida Atlantic University to digitize, archive and distribute this item for non-profit research and educational purposes. Any reuse of this item in excess of fair use or other copyright exemptions requires permission of the copyright holder.
Use and Reproduction: http://rightsstatements.org/vocab/InC/1.0/
Host Institution: FAU
Is Part of Series: Florida Atlantic University Digital Library Collections.