Nonlinear Analysis of Composite Beams under Random Excitations

<p>The vibration responses of three unsymmetrically laminated beams, that are excited with a Gaussian random forcing function, are studied in this thesis. The beams are analyzed nonlinearly and compared to linear results, indicating some important corrections. The solution procedure begins with the derivation of the general equation of motion using Galerkin's method. Then, two approaches are taken in the solution. First, the equation of motion is attacked directly employing a real time Runge-Kutta numerical analysis. Second, the method of equivalent linearization is used. The thesis finds the results from the two approaches to be in a close agreement, although some discrepancies at high loads could be found. However, the most important achievement of the thesis is undoubtedly that the same response equation can be used for any type of laminate layup, and any of the three types of beams. One of many applications that the solution can be used for is the assessment of fatigue tolerances.</p>

Name thesis:degree_name

Master of Aerospace Engineering

Level thesis:degree_level

Thesis - Open Access

Discipline thesis:degree_discipline

Graduate Studies

Year

1995

Author dc:creator

• Gudmundsson, Snorri

Contributors dc:contributor

• Habib Eslami
• Howard D. Curtis
• Frank Radosta

• nonlinear analysis
• composite beams
• random excitations
• Aerospace Engineering

Repository record dc:identifier

https://commons.erau.edu/db-theses/280

OAI identifier oai:identifier

oai:commons.erau.edu:db-theses-1104