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将MR阻尼器作为被动耗能装置使用,对不同位置的阻尼器施加不同的控制电压,控制电压的大小由多目标遗传算法NSGA-Ⅱ确定。对一装有MR阻尼器的3层框架结构分别输入峰值调整为0.25g的ElCentro波、Kobe波,Hachinohe波和Northridge波进行仿真分析。结果表明,优化方案对位移和加速度的控制都明显优于passive-off方案,对位移的控制效果与passive-max接近,对加速度的控制优于passive-max方案。
The MR damper is used as a passive energy dissipation device. Different control voltages are applied to the dampers at different positions. The magnitude of the control voltage is determined by a multi-objective genetic algorithm NSGA-II. The three-layer MR frame with MR damper was simulated by ElCentro, Kobe, Hachinohe and Northridge waves respectively with the peak value adjusted to 0.25g. The results show that the optimized scheme has much better control over displacement and acceleration than the passive-off scheme. The control effect of displacement is close to passive-max, and the control over acceleration is superior to passive-max scheme.