Research On Seismic Isolation Of Semi-active Isolated Structures Based On Multi-objective Cuckoo Search Algorithm

Since the reform and opening up,with the rapid economic development,more and more buildings in China have risen from the ground,and public buildings and civil buildings have emerged in endlessly.Especially the idea of relocating from ancient times to the present has made more and more houses Rapid construction takes a lot of financial and material resources,so once an earthquake occurs,our country will suffer great losses.In recent years,basic isolation has developed rapidly,and it has been widely used around the world.Among them,the multi-objective optimization problem is very important in engineering applications,and the goal of shock absorption can be achieved by optimizing the semi-active control strategy.In this paper,a multi-objective cuckoo search algorithm is used to optimize the semi-active isolated structure to improve the seismic resistance of the base isolated structure,which mainly includes the following aspects:(1)Using the base isolation structure with piezoelectric friction damper,the mechanical model used for the structure,the mechanical model used for the isolation support and the mechanical model for piezoelectric friction damper are determined,and the corresponding Simulink model is established.(2)Taking fuzzy control strategy as the base model,the multi-object cuckoo algorithm is used to optimize the fuzzy control rules in the fuzzy control strategy,and the MOCS-FUZZY controller is established to obtain the optimal fuzzy The control rule is to adjust the output control force of the damper by adjusting the output voltage of the piezoelectric friction damper.(3)Six near-fault seismic waves and two far-field seismic waves were selected in the strong earthquake database,and the uncontrolled and semi-active control simulations were carried out respectively.And analyze and compare the seismic response of the structure under the three control strategies under the action of different seismic waves.It can be seen from the results that under the action of different seismic waves,the proposed MOCS-FUZZY controller can significantly reduce the displacement of the isolation layer,And there is no increase in the acceleration and displacement of the top layer of the superstructure.