新型压电摩擦阻尼器在输电塔结构中的振动控制研究

Research of vibration control of high-voltage transmission tower with a new piezoelectric friction damper

基于所提出的新型压电摩擦阻尼器,利用ANSYS有限元软件对一高压输电塔进行了有限元建模,并通过超单元法与MATLAB编程相结合的方法提取了该输电塔结构的整体刚度、质量及阻尼矩阵;利用MATLAB中的SIMULINK仿真工具箱编制了适于该结构的半主动控制系统;最后,利用遗传算法工具箱对100个阻尼器的布置位置进行了优化,并结合所提出的半主动控制系统,对该输电塔在EL-Centro地震作用下进行了无控、阻尼器位置优化后有控及随机布置后有控的控制效果对比分析.结果表明,该阻尼器及半主动控制系统能够有效地对该高压输电塔进行振动控制,且经优化布置后的控制效果明显优于随机布置,表明利用遗传算法对阻尼器的布置位置进行优化是可行有效的.

Based on the proposed new type of piezoelectric friction damper, the finite element modeling of a high-voltage transmission tower was established with the finite element software ANSYS. Meanwhile the overall stiffness, mass and damping matrix of the transmission tower structure were extracted by combining the super-element method and MATLAB programming. A suitable semi-active control system for the structure was prepared with MATLAB SIMULINK toolbox. Finally, the layout of the 100 dampers was optimized with the genetic algorithm toolbox, and combined with the semi-control system. The control effect was analyzed under the no control, the optimized arrangement of the control and the random arrangement of the control with the EL-Centro earthquake. The results showed that the high- voltage transmission tower vibration could be effectually controlled with the damper and the semi-active control system, and the control effect of the optimized arrangement was significantly better than that of random arrangement, which indicated that using the genetic algorithm to optimize the arrangement of the damper was feasible and effective.