Minimum-Weight Design of a Portal Frame

1958 ◽  
Vol 123 (1) ◽  
pp. 66-74
Author(s):  
William Prager
Keyword(s):  
Minimum Weight ◽  
Minimum Weight Design ◽  
Portal Frame ◽  
Weight Design

Optimum Plastic Design of a Portal Frame for Alternative Loads

1967 ◽  
Vol 34 (3) ◽  
pp. 772-773 ◽  
Author(s):  
W. Prager
Keyword(s):  
Minimum Weight ◽  
Necessary Condition ◽  
Minimum Weight Design ◽  
Plastic Design ◽  
Portal Frame ◽  
Weight Design

Minimum-weight design of a portal frame for alternative combinations of horizontal and vertical loads is discussed. It is shown that the usual proof of the existence of a Foulkes mechanism as a necessary condition for minimum weight cannot be carried over to this problem.

On Foulkes Mechanism in Portal Frame Design for Alternative Loads

1969 ◽  
Vol 36 (1) ◽  
pp. 73-75 ◽  
Author(s):  
H. S. Y. Chan
Keyword(s):  
Minimum Weight ◽  
Sufficient Condition ◽  
Programming Formulation ◽  
Necessary And Sufficient Condition ◽  
Minimum Weight Design ◽  
Frame Design ◽  
Portal Frame ◽  
Linear Programming Formulation ◽  
Weight Design ◽  
Necessary And Sufficient

Minimum-weight design of a portal frame for alternative loadings is discussed. A linear programming formulation is used. The concept of Foulkes mechanism as the necessary and sufficient condition for optimum is generalized for this class of problems.

Minimum Weight Design of Ring Stiffened Cylinders Under External Pressure

1961 ◽  
Vol 5 (03) ◽  
pp. 44-49 ◽  
Author(s):  
George Gerard
Keyword(s):  
Yield Strength ◽  
Minimum Weight ◽  
External Pressure ◽  
Compressive Yield Strength ◽  
Minimum Weight Design ◽  
Weight Design

Minimum weight analyses for unstiffened and ring-stiffened cylinders under external pressure are presented for designs based on stability and compressive yield-strength considerations. The results for both types of cylinders are compared in terms of a common set of parameters to establish the efficiency of the stiffening system. The results are then compared on a somewhat different basis to establish the relative efficiencies of various classes of materials. Finally, certain conclusions are drawn of particular pertinence to deep submersibles.

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