Title

Damping Models For Timoshenko Beams With Applications To Spacecraft Wiring Harnesses

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 em- ployed 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 approx- imately 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. © 2012 AIAA.

Publication Date

8-15-2013

Publication Title

Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference

Number of Pages

-

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

84881331802 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84881331802

This document is currently not available here.

Share

COinS