Optimal Design Of Friction-Damped Vibration Damping Structures Based On Improved Particle Swarm Algorithms

At present,the traditional seismic design of building structures can no longer meet the requirements of people for the safety of building structures.With the development of energy dissipation damping technology,more and more researchers have started to use energy dissipation damping technology in structures.At present,research on energyconsuming damping devices is carried out either by changing the parameters of the devices,or by changing the arrangement of the damping devices,or by adjusting the number of damping devices to use the minimum number to achieve the best damping effect under the condition of considering the economic cost.In this paper,the parameters,arrangement and number of friction-damped damping devices in a non-linear structure are optimized using an improved discrete binary particle swarm algorithm and a hybrid continuous particle swarm algorithm.The details of the study are as follows.(1)Particle swarm algorithms can effectively solve optimization problems not only for continuous real numbers,but also for discrete variables.In this paper,based on the improvement of the continuous particle swarm algorithm and the position update conversion function of the discrete binary particle swarm algorithm,the improved discrete binary particle swarm algorithm and the continuous particle swarm hybrid algorithm are used to simultaneously optimize the parameters,placement and number of damping devices in friction-damped damping structures.(2)Three different working conditions were selected as the objective functions,and the damping effect of the friction-damped damping structure under the seismic action of different working conditions was analyzed respectively,which proved the feasibility and effectiveness of the optimization results of the algorithm;in the selection of the objective functions of the particle swarm in the friction-damped damping structure,three different objective functions were given,and the optimization results of different objective functions were compared and analyzed.(3)The improved hybrid particle swarm algorithm is applied to the friction damped damping structure to optimize the friction damped damping structure under different seismic waves.The results show that the improved hybrid particle swarm algorithm can simultaneously optimize the parameters,placement and number of dampers in the friction damped damping structure.