Optimum structural sizing for gust induced responseThe present paper describes an optimization capability for sizing airframe structures that are subjected to a combination of deterministic and random loads. Design constraints are implemented to prevent structural failure in fatigue and due to a single exceedance of the allowable stress. The random load is treated as a stationary, homogeneous process with a Gaussian probability distribution, and a frequency domain method is used for the computation of dynamic response parameters. An equal-probability-of-load-combination criterion is proposed in the formulation of strength constraints. This alleviates problems associated with the incomplete phase information available when using power spectral density methods. The optimization procedure is illustrated by examples using typical built-up structures.
Document ID
19880045021
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hajela, P. (Florida Univ. Gainesville, FL, United States)
Bach, C. T. (Florida, University Gainesville, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1988
Subject Category
Aircraft Design, Testing And Performance
Report/Patent Number
AIAA PAPER 88-2298
Meeting Information
Meeting: Structures, Structural Dynamics and Materials Conference