NDLI: Continuum Modeling of a Slewing ISAT (Innovative Space Antenna Technology)

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Salehian, Armaghan Eugene, M. Cliff Daniel, J. Inman
Copyright Year	2005
Abstract	A simple approach is presented herein for obtaining the equivalent continuum model of an ISAT (Innovative Space Antenna Technology) truss structure in order to find the free vibration solutions for different coordinates of vibration. Kinetic and potential energy expressions are written in terms of the strain components of the elements and the nodal velocities. The Lagrangian approach is employed to find the governing partial differential equations of the structure which for the bending degrees of freedom lead to an equivalent Timoshenko beam. Finally, the physical characteristics of the continuum model are written in terms of the material and geometrical properties of the truss, which provide a simple tool for comparing dynamic characteristics of lattices with different properties. The natural frequencies are found for each of the bending, longitudinal, and torsional coordinates of vibration and are compared to those of a FEM solution for the purpose of validation. The analytical model shows very high accuracy in prediction of the natural frequencies of the original truss.
Sponsorship	Design Engineering Division and Computers and Information in Engineering Division
Starting Page	1971
Ending Page	1977
Page Count	7
File Format	PDF
ISBN	0791847381
DOI	10.1115/DETC2005-84025
e-ISBN	0791837661
Volume Number	Volume 1: 20th Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C
Conference Proceedings	ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
Language	English
Publisher Date	2005-09-24
Publisher Place	Long Beach, California, USA
Access Restriction	Subscribed
Subject Keyword	Continuum model Inflatable structures Truss structures Isat Potential energy Degrees of freedom Finite element model Vibration Partial differential equations Free vibrations Air-supported structures Finite element methods Modeling Trusses (building)
Content Type	Text
Resource Type	Article

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