Dynamic Finite Element Modeling of Flexible Structures.

Abstract

In Part I, reduced basis techniques are applied to the problem of the nonlinear analysis of the dynamics of unrestrained flexible structures. The reduced bases used consisted of mode shapes of the structures. The reduced bases used consisted of mode shapes of the structure as well as some modal derivatives. The technique was tested on a simple spacecraft structure. The numerical results indicated that the technique did not appear very promising for this type of problem. In Part II, a finite element technique is used for analysis of very flexible structures undergoing deployment maneuvers. The structure is assumed to consist of flexible bars attached to a rigid mass. The description of elastic deformation is based on the total lagrangian formulation which allows finite rotation. Numerical tests demonstrates the validity of the present approach.

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Document Details

Document Type
Technical Report
Publication Date
Nov 20, 1986
Accession Number
ADA177168

Entities

People

  • C. S. Choi
  • E.R. Christensen
  • Seh Wook Lee

Organizations

  • University of Maryland

Tags

Communities of Interest

  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Applied Mechanics
  • Artificial Satellites
  • Deployment
  • Differential Equations
  • Earth Orbits
  • Engineering
  • Equations
  • Equations Of Motion
  • Finite Element Analysis
  • Flexible Structures
  • Mechanics
  • Moment Of Inertia
  • Nonlinear Analysis
  • Rotation
  • Spacecraft
  • Three Dimensional
  • Two Dimensional

Readers

  • Software Engineering
  • Structural Dynamics.

Technology Areas

  • Space