A New Genetic Algorithm Methodology for Design Optimization of Truss Structures: Bipopulation-Based Genetic Algorithm with Enhanced Interval Search

Algorithm 1

Pseudocode for SGA.

SGA (𝑃_𝑖,NG,SP,𝐹_𝑖,Par_sel,Par_mut,Par_cr)

If [𝑃_𝑖]=[], Initialize (𝑃_𝑖, SP, NDV)

for 𝑖=1: NG

[𝑃^𝑑_𝑖]=𝑃_𝑖

If required, [𝑃^𝑑_𝑖]=Decoding(𝑃_𝑖)

If [𝐹_𝑖]=[],[𝐹_𝑖]=Fitness_Calculation(𝑃^𝑑_𝑖)

[𝑃_𝑖−sel]=Selection(𝑃_𝑖,𝐹_𝑖,Par_sel)

[𝑃_𝑖+1−sel]=Selection(𝑃_𝑖,𝐹_𝑖,Par_sel)

[𝑃_new]=𝑃_newUCrossover(𝑃_𝑖−sel,𝑃_{𝑖+1−se𝑙},Par_cr)UMutation(𝑃_𝑖−sel,𝑃_𝑖+1−sel,Par_mut)

[𝑃_𝑖]=[𝑃_new]

end