A Modal Analysis and Modelling of a Lightly Damped Large Space Structure

Author

Scott E. George

Date of Award

6-1992

Document Type

Thesis

Degree Name

Master of Science

Department

Department of Aeronautics and Astronautics

First Advisor

Howard D. Gans, PhD

Second Advisor

Ronald L. Bagley, PhD

Third Advisor

Bradley S. Liebst, PhD

Abstract

This study involves the modification to the PACOSS Dynamic Test Article to create a lightly damped representative large space structure with closely spaced, low frequency modes. An experimental modal analysis is performed to recharacterize the low frequency flexible vibration modes. A finite element model is created using MSC/NASTRAN to predict low frequency behavior using both real eigenvalue analysis and frequency response analysis. Then a reduced order model is created and fine-tuned to represent the dynamics of the structure for the identified low frequency modes.

AFIT Designator

AFIT-GA-ENY-92J-01

DTIC Accession Number

ADA256566

Comments

The author's Vita page is omitted.

Recommended Citation

George, Scott E., "A Modal Analysis and Modelling of a Lightly Damped Large Space Structure" (1992). Theses and Dissertations. 7505.
https://scholar.afit.edu/etd/7505