Loading…
This event has ended. Visit the official site or create your own event on Sched.
Welcome to ICSV26!
Back To Schedule
Tuesday, July 9 • 15:50 - 16:10
ANALYSIS OF THE POWER FLOW AND MODAL ENERGY DISTRIBUTION IN FIBER REINFORCED COMPOSITE BEAMS

Log in to save this to your schedule, view media, leave feedback and see who's attending!

Feedback form is now closed.
Fiber reinforced composites are used to fabricate components for aerospace, automotive and marine structures because of their high strength and low density. Modeling the vibration transmission in such structures is used as a design tool to ensure vibration and acoustic levels are within prescribed limits. In this work the high frequency dynamics of composite beams are investigated to determine if such structures can be appropriately included as subsystems in the tool, Statistical Energy Analysis. An underlying assumption in Statistical Energy Analysis is that there is an equipartition of modal energy in each subsystem. The study derives expressions for the total modal energy of composite beams with the following layups: (1) symmetric unbalanced layup coupled in bending-torsion and (2) non-symmetric cross-ply layup elastically coupled in bending-extension. It is shown that when beams of both layups are excited by spatial white noise the variation in modal energy over the modal spectrum is non-uniform even under the assumption of a constant damping bandwidth. The behavior is observed to be more pronounced for the laminate coupled in bending-torsion. Expressions for the power flow of the propagating waves on the beam are derived for both lay-ups and it is shown that the strength of the cross-conversion of wavetypes at the boundaries dictate the distribution of modal energy levels.

Moderators
avatar for Simon Jones

Simon Jones

Associate Professor, Rose-Hulman Institute of Technology
Professional interests include undergraduate engineering education, finite element modeling, ground-borne vibrations, vibrations of musical instruments, and dynamics of toys.
GM

Guilhem Michon

Professor, ISAE-SUPAERO

Authors

Tuesday July 9, 2019 15:50 - 16:10 EDT
St-Laurent 7
  T07 Struct. dyn. & nonlin. vib., RS03 Struct ac & vibr

Attendees (6)