磁流变变阻尼半主动控制结构的仿真分析

由于高阶单步法已成功地应用于结构非线性分析及考虑时滞的主动控制等，显示了它的稳定、精度高和计算迅速等特点。用于结构振动控制的磁流变阻尼器属于速度相关型变阻尼半主动控制器，已有的一些算法，或因计算时间过长不能用于实际控制，或因需要事先经过学习训练，控制效果取决于训练学习的情况。因此，本文将高阶单步法应用于磁流变变阻尼半主动控制系统，采用开关控制和连续控制两种控制率对磁流变液的剪切强度进行调节。仿真计算表明，该控制算法是一种能用于结构实际控制的变阻尼有效算法.

Simulation analysis of semi-active control of structures with magnetorheological variable damper

Because the successful application to nonlinear analysis of structure vibration and active control takes into account the time-delay,the high order single step method shows good stability, high precision and high computing speed, etc. The magnetorheological fluid damper applied to structural vibration control is velocity-related variable damper, the present algorithms need too long calculation time to be used to practical control or need training in advance, and their control effects depend on the result of the training. Therefore the paper applies the high order single step method to the semi-active control system of structures with magnetorheological variable dampers,in which two control rules, switch control rule and continuative control rule, are used to regulate the shearing stress of magnetorheological fluid. It is proved by the results of simulation analysis that this control method is an effective method in practical control of structures with variable dampers.