0
RESEARCH PAPERS

Determining the Loss Factor by the Power Input Method (PIM), Part 1: Numerical Investigation

[+] Author and Article Information
M. Carfagni, M. Pierini

Dipartimento di Meccanica e Tecnologie Industriali, Universià di Firenze, Via di Santa Marta, 350139 Firenze, Italy

J. Vib. Acoust 121(3), 417-421 (Jul 01, 1999) (5 pages) doi:10.1115/1.2893996 History: Received March 01, 1998; Online February 26, 2008

Abstract

Damping must be accurately determined in the design and/or optimization of vehicle and aircraft trim. Yet, owing to the complexity of the dynamic interaction among the components in trimmed panel systems, until now it has been difficult to obtain reliable damping estimates. In this work, the power input method (PIM), which compares dissipated energy to the structure’s strain energy, was evaluated as a damping evaluation tool. Numerical simulations were used to analyze the lumped mass system (with custom software) and the plates (with commercial finite element software) and consequently to evaluate the assumptions required to apply the PIM. It was thus possible to find a way of minimizing the effect of the assumptions on the results, whose importance would be fundamental in the successive phase involving the experimental application of the method.

Copyright © 1999 by The American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In