基于新型压电摩擦阻尼器的高压输电塔半主动抗震控制

Semi-active seismic control of high-voltage transmission tower based on a new type of piezoelectric friction damper

基于笔者开发的以压电陶瓷管状驱动器为核心元件的新型压电摩擦阻尼器,利用ANSYS软件对高压输电塔进行有限元建模,并通过超单元法与MATLAB编程相结合的方法提取输电塔结构的整体刚度矩阵、质量矩阵、阻尼矩阵。利用MATLAB编制了LQR最优控制策略、最优Bang-Bang半主动控制策略的相关程序,并利用SIMULINK仿真工具箱将二者结合构成适于高压输电塔结构的半主动控制系统。利用所提出的压电摩擦阻尼器及所编制的半主动控制系统,对输电塔进行了EL-Centro地震作用下的振动控制。结果表明,该阻尼器及半主动控制系统能够有效地控制输电塔的地震响应且平均控制效果系数达25%。

Based on the proposed new type of piezoelectric friction damper,a finite element model of a high-voltage transmission tower was established with the finite element software ANSYS.Meanwhile,the overall stiffness and the quality and damping matrixes of the transmission tower structure were extracted by combining the super-element method and MATLAB programming.The LQR optimal control strategy and the Bang-Bang optimal semi-active control strategy program were compiled,and a suitable semi-active control system for the high-voltage transmission tower was established by combining the two strategies with the SIMULINK toolbox.With the proposed piezoelectric friction damper and the preparation of the semi-active control system,vibration control was carried out towards the transmission tower under the conditions of the EL-Centro earthquake.The results show that the damper and semi-active control system can effectively control the seismic response of the tower and the averaged control effect coefficient reached 25%.