Truss Optimization with Natural Frequency Constraints Using a Dolphin Echolocation Algorithm

Dynamic response of a structure is a remarkable characteristic which can be optimized (controlled) by imposing constraints on natural frequencies. But it is mentionable that size and shape optimization of trusses with multiple frequency constraints is a very non-linear and non-convex problem that may be converged to local optima when using meta-heuristic algorithms. To concur this problem, researchers have developed hybrid meta-heuristic algorithms. In this paper recently introduced dolphin echolocation algorithm is applied for optimum design of truss structures with frequency constraints. Four numerical examples are considered to demonstrate the efficiency of the algorithm in comparison to hybrid metaheuristic algorithms.