ThisstudyproposesanewPSOS-modelbaseddamageidentificationprocedureusingfrequencydomaindata.TheformulationoftheobjectivefunctionfortheminimizationproblemisbasedontheFrequencyResponseFunctions(FRFs)ofthesystem.AnovelstrategyforthecontroloftheParticleSwarmOptimization(PSO)parametersbasedo