Damage Identification Of Structural Based On Improved Bat Algorithm

Structural health monitoring is a comprehensive technology,relates to the structural dynamics of information technology,such as signal transmission,storage and processing,sensor technology,optimization design and other disciplines,and the use of computer intelligent algorithm with constraints on the mathematical model of the dynamic response of structure before and after damage were analyzed to detect whether the structure injury,damage location,damage degree and type.When damage occurs in structure,the structure of some parts of the size and material properties will change in the weakening of stiffness and strength,section size and boundary conditions of the structure or reduce the impact,the dynamic properties of the structure,specific performance in the performance of structure is reduced,reducing the use of life.Aiming at the application of swarm intelligence optimization algorithm in structural damage identification,this paper shows that the improved swarm intelligence algorithm has better ability of damage identification,and is committed to provide a basis for selection of practical engineering applications.(1)describes the present research of damage identification of structures at home and abroad,identified 4 levels to identify structural damage diagnosis of structure damage: to determine whether the damage,damage degree,damage size and type and structure residual life,for structural damage identification of 4 species of intelligent optimization algorithms are introduced: the cuckoo algorithm and particle swarm algorithm artificial fish swarm algorithm,and bat algorithm.(2)the principle and implementation process of the heuristic bat algorithm(BA)are introduced,and the algorithm is improved according to the main control factors of the algorithm(loudness and pulse emissivity),and the specific improvement method is given.(3)the natural frequencies and mode shapes of the two parameters of the dynamic response of simply supported beam and continuous beam finite element model is established based on the MATLAB 2016 b,set different conditions,respectively with thebat algorithm(BA)and a new improved bat algorithm(MBA)for structural damage identification,determine the location and degree of damage.To verify the improved algorithm of damage identification validity and superiority.(4)MATLAB model is established based on concrete beams,respectively,vibration test on concrete beam model in 2015 and 2017,based on the consideration of the elastic modulus of concrete discreteness,optimized for the theory of elastic modulus of elastic modulus based on finite element model,establish a baseline finite element model,using the improved algorithm of target bats function to solve and get the frequency and mode of vibration,the recognition results obtained in the benchmark model to define the frequency and vibration mode,comparing the measured frequency and frequency analysis theory,error test,to verify the improved algorithm accuracy and robustness.