Damping models for Timoshenko beams with applications to spacecraft wiring harnesses

Jeffrey L. Kauffman, George A. Lesieutre

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Power and data cabling are attached to a spacecraft bus structure at many points and can account for a significant fraction of a spacecraft's dry mass. This combination leads to coupled spacecraft and cable dynamics that require a model to predict the effects of this interaction. While current models can accurately predict vibration frequencies, typical proportional damping models are inadequate. Instead, a viscous damping model that produces approximately frequency-independent modal damping in Euler-Bernoulli and shear beams is considered. The relevant viscous damping terms (as well as those commonly employed in proportional damping approaches) are extended and modified for application to Timoshenko beams. The inclusion of rotary inertia does add some frequency-dependence; however, careful selection of damping coefficients can produce a large range of approximately frequency-independent modal damping. As transverse shear and rotary inertia effects become large, this range decreases, with the terms producing modal damping values that increase or decrease with mode number in a fashion similar to typical proportional damping models, but at a much lower rate. When transverse shear and rotary inertia effects approach zero, collapses to the one that provides frequency-independent modal damping for the Euler-Bernoulli beam.

Original languageEnglish (US)
Title of host publication54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
DOIs
StatePublished - Aug 2 2013
Event54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Boston, MA, United States
Duration: Apr 8 2013Apr 11 2013

Publication series

Name54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

Other

Other54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
CountryUnited States
CityBoston, MA
Period4/8/134/11/13

Fingerprint

Electric wiring
Spacecraft
Damping
Vibrations (mechanical)
Cables

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Mechanics of Materials
  • Building and Construction
  • Architecture

Cite this

Kauffman, J. L., & Lesieutre, G. A. (2013). Damping models for Timoshenko beams with applications to spacecraft wiring harnesses. In 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference (54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference). https://doi.org/10.2514/6.2013-1890
Kauffman, Jeffrey L. ; Lesieutre, George A. / Damping models for Timoshenko beams with applications to spacecraft wiring harnesses. 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. 2013. (54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference).
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Kauffman, JL & Lesieutre, GA 2013, Damping models for Timoshenko beams with applications to spacecraft wiring harnesses. in 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, Boston, MA, United States, 4/8/13. https://doi.org/10.2514/6.2013-1890

Damping models for Timoshenko beams with applications to spacecraft wiring harnesses. / Kauffman, Jeffrey L.; Lesieutre, George A.

54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. 2013. (54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Kauffman JL, Lesieutre GA. Damping models for Timoshenko beams with applications to spacecraft wiring harnesses. In 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. 2013. (54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference). https://doi.org/10.2514/6.2013-1890