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Analysis of Beams on Elastic Foundations by NASTRAN/PATRAN Finite Element software

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Conference

2022 ASEE - North Central Section Conference

Location

Pittsburgh, Pennsylvania

Publication Date

March 18, 2022

Start Date

March 18, 2022

End Date

April 4, 2022

Page Count

17

DOI

10.18260/1-2--39229

Permanent URL

https://peer.asee.org/39229

Download Count

1280

Paper Authors

biography

Cyrus K Hagigat The University of Toledo

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Dr. Hagigat is an associate professor in the Engineering Technology department of the College of Engineering of the University of Toledo. Dr. Hagigat has an extensive industrial background, and his teaching technique is based on practical aspects of engineering.

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Abstract

NASTRAN/PATRAN is one of the more commonly used Finite Element technique software packages which can be used to obtain solutions for non-standard loading scenarios. One of the non-standard loading scenarios is “Beams on Elastic Foundations.” The Elastic foundation can be continuous or applied at certain point(s) along the beam. Closed form solutions for Static Stress analysis for such structures are available for some standard “Beams on Elastic Foundations” cases in classical textbook such as “Roark’s Formulas for Stress & Stain.” However, the formulas are tedious to use and apply to limited loading conditions. The presence of elastic supports also influence the vibration behavior of the structures. The vibration characteristics of such structures cannot be obtained by classical vibration analysis techniques, and Finite Element techniques must be used for accurate vibration analyses. In this article, NASTRAN/PATRAN is used to perform Static and Vibration analyses of beams on elastic foundations subjected to various loading conditions. The techniques illustrated in this article were used in a “Machine Design” course. The study involved verifying the Static Finite Element results by comparing them to results for scenarios where classical solutions from Roark’s were available and then extending the Finite Element model beyond the scope of classical solutions. The Vibration Finite Element models were initially developed and verified by comparing their results against known solutions, and then the modeling techniques were used to model more complicated structures where no classical solution exists.

Hagigat, C. K. (2022, March), Analysis of Beams on Elastic Foundations by NASTRAN/PATRAN Finite Element software Paper presented at 2022 ASEE - North Central Section Conference, Pittsburgh, Pennsylvania. 10.18260/1-2--39229

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