Study On The Optimization Of The Space Truss Structure Of The Piezoelectric Friction Resistor System

With the development of the national economy,there have many characteristics of the space structure of the building,and the spatial structure of the seismic and vibration requirements are higher.Only relying on the structure itself is difficult to resist the external earthquake.Usually the structure need to add shock absorber system Reduce the vibration response of them.In recent years,the application of intelligent materials and the development of vibration control theory have provided a new way for structural vibration control.In this paper,In this paper,a piezoelectric friction damping system is proposed by using the mechanical properties of the electric energy and mechanical capacity of piezoelectric materials.The shaking system is optimized by shark algorithm and simulated by shaking table.The main contents of the paper are:(1)Based on the piezoelectric material,and applied its electrical and mechanical capacity conversion characteristics,a piezo-resistive friction system was developed to establish the mechanical calculation model of the damping system.At the same time,the performance parameters of the system were determined,and the simulation model was obtained.And it can provide the basis for numerical simulation and simulation optimization.(2)Based on the artificial fish swarm algorithm,the piezoelectric frictional damping system based on spatial structure proposed in this paper is used to study the optimization of the damping system layout and arrangement quantity,Through utilized the MATLAB language programming program,we analyzed the seismic response of the space bar structure and studied the control effect of the space bar structure optimization before and after the shock.The results show that the artificial fish swarm algorithm isused to optimize the configuration of the piezoelectric frictional damping system,and the global convergence efficiency is high and the robustness is strong.The optimized interplanar displacement of the space rod structure is about 41%.Control effect is obvious.(3)A 2-span 3-layer space structure model was designed and fabricated.The piezoelectric friction damping system was integrated into the spatial model structure.Three kinds of layout schemes were selected to arrange the seismic shaking table without arranging,random arrangement and artificial fish swarm optimization.The The results show that the average displacement of the control effect can be reduced by25.4% and the acceleration can be reduced by 15.7% on average when the random arrangement is adopted.However,the control effect of the optimization scheme is better after the fish group algorithm is optimized.The average displacement can be reduced by41.0%,the acceleration can be reduced by an average of 28.4%.The results show that the proposed method can effectively reduce the seismic response of the space bar structure by using the piezoelectric friction damping system proposed in this paper.The optimized method of artificial fish swarm optimization is obvious,and the effect of interlayer displacement and acceleration is 61.4% And 80.8%,indicating that the proposed piezoelectric friction damping system and optimization method is effective and feasible for further research and application of reference.