Statistical Sensitivity Analysis of Lattice Space Structures
Publication: Journal of Aerospace Engineering
Volume 6, Issue 3
Abstract
This paper presents a statistical sensitivity analysis for shape distortions of space structures. The approach is based on a statistical shape‐distortion analysis on the structural errors and an adjoint method of sensitivity analysis. The statistical shape‐distortion analysis allows the stochastic errors to be represented by member‐length tolerances. The sensitivity analysis is performed to predict the effects of member‐length errors for lattice space antennas on the surface accuracy. The formulas presented in this paper give an effective approach to predict the effects of member‐length errors on the shape distortions, to obtain effective structural elements to correct the shape distortions, and to design tolerance errors of the structural elements. Numerical examples for statically determinate and indeterminate two‐dimensional truss beams have been demonstrated to identify the members contributing most to the errors. These results show that the errors of the longitudinal elements of the structure are important for designing accurate truss structures. Moreover, the validity and effectiveness of the present approach have been investigated.
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Information & Authors
Information
Published In
Journal of Aerospace Engineering
Volume 6 • Issue 3 • July 1993
Pages: 236 - 248
Copyright
Copyright © 1993 American Society of Civil Engineers.
History
Received: Jun 25, 1991
Published online: Jul 1, 1993
Published in print: Jul 1993
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