An efficient method is presented for multi-criterion preliminary design and demonstrated for a tetrahedral truss platform. The present method requires minimal analysis effort and permits rapid estimation of optimized truss behavior for preliminary design.A 14 m-diameter, 3-ring truss platform represents a candidate reflector support structure for space-based science spacecraft. The truss members are divided into 9 groups by truss ring and position. Design variables are the cross-sectional area of all members in a group, and are either 1, 3 or 5 times the minimum member area. Non-structural mass represents the node and joint hardware used to assemble the truss structure. Taguchi methods are used to efficiently identify key points in the set of Pareto-optimal truss designs. Key points identified using Taguchi methods are the maximum frequency, minimum mass, and maximum frequency-to-mass ratio truss designs. Low-order polynomial curve fits through these points are used to approximate the behavior of the full set of Pareto-optimal designs. The resulting Pareto-optimal design curve is used to predict frequency and mass for optimized trusses. Performance improvements are plotted in frequency-mass (criterion) space and compared to results for uniform trusses. Application of constraints to frequency and mass and sensitivity to constraint variation are demonstrated.
Multi-criterion preliminary design of a tetrahedral truss platform
Multikriterielle vorläufige Konstruktion einer Plattform mit tetragonaler Verankerung
1995
9 Seiten, 8 Bilder, 4 Tabellen, 12 Quellen
Aufsatz (Konferenz)
Englisch
Multi-Criterion Preliminary Design of a Tetrahedral Truss Platform
British Library Conference Proceedings | 1995
|Multicriterion Preliminary Design of a Tetrahedral Truss Platform
Online Contents | 1996
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