Numerical Simulation And Experimental Research Of Smart Structure Driven By Micro Fiber Composites Actuator

Smart structures with distributed piezoelectric systems are widely applied industries, such as aerospace industry. Piezoelectric fiber actuator could be widely applied in smart materials and structures, since they have more toughness, performances and orthotropy. Because of the huge dimensional discrepancy, the finite element grid is hard to divided. So the simulation of smart structures is much complicated. Based on the analogy between converse piezoelectric effect and thermoelastic effect, an applied electric field is input as a thermal load and piezoelectric strain coefficient's characterizing an actuator are modeled as thermal expansion coefficients, and thermoelastic finite element method can be employed to analyze smart structures with distributed piezoelectric.In this paper, the numerical simulation and experimental analysis are applied to the smart structures driven by piezoelectric fiber actuator. Main study work is as followed:1. Give a brief introduction of the basic information and theories of piezoelectric effects in this paper. Recite the basic theory and commonly approach of finite element method in piezoelectric materials analysis. The selection of piezoelectric actuator is also presented.2. Based on the analogy between converse piezoelectric effect and thermoelastic effect, thermoelastic finite element method can be employed to analyze converse piezoelectric effect. So that thermoelastic finite element method can be employed to analyze piezoelectric fiber actuator's static displacement.3. The mechanical model and the finite element model of piezoelectric plate structure are derived and developed. The characteristics of deformation of smart structures are found by numerical simulation. The influence of the tack coat's thickness in the smart structures system is analyzed.4. The experiment platform of the smart structures system is set up. After that introduced the principle and equipment of the experiment, and analyzed experiment's result. At last, builds finite element model of the wind-box, and carries out numerical simulation analysis with piezoelectric-thermal analogy method.