Minimum Weight Design of Enclosed Antennas

by Mehdi S. Zarghamee,

Serial Information: Journal of the Structural Division, 1969, Vol. 95, Issue 6, Pg. 1139-1152

Document Type: Journal Paper


The minimization of the total weight of the tiltable component of an enclosed antenna structure with a given topology and a given initial design subject to relative deformation constraints (rms limits) in both face-up and face-side attitudes as well as to certain structural constraints is formulated, and the solution to this problem is sought by a modified version of the gradient projection method of nonlinear programming. The given initial design should satisfy all the structural constraints, but it may violate one or both deformation constraints. The solution is obtained in two steps by first finding a feasible solution, that is a solution which satisfies all the constraints, and then minimizing the total weight subject to structural and deformation constraints. The structural constraints, for the sake of simplicity, have been assumed to be linear. The method is tested by optimizing a plane truss of a large radio telescope antenna.

Subject Headings: Minimum weight design | Deformation (mechanics) | Antennas | Plastic design | Nonlinear analysis | Computer programming | Linear functions | Optimization models

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