基于遗传算法的结构主动控制作动器优化布置
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摘要
研究地震激励作用下主动控制结构的作动器优化布置,基于等效激励法构造了随机激励,应用状态空间控制算法进行了求解。针对作动器优化布置问题提出了基于遗传算法的优化方案,即利用遗传算法的0,1染色体编码模拟作动器的楼层空间布置,实现了作动器数目限定条件下,以楼层最大加速度和层间位移角组合为控制目标函数的作动器最优布置。仿真分析表明,该优化方法适应性强,效果显著。
The optimization of actuators of an active control structure under seismic excitation is studied.The random excitation is generated by equivalent excitation method,and the state space control algorithm is employed to calculate the dynamic responses.An optimized procedure based on genetic algorithm is proposed,in which a 0-1 chromosome coding is used to resemble the spatial arrangement of actuators.Several typical cases are analyzed,in which the fitness objectives are composed of maximum acceleration response and maximum inter-story angle,while the structure is controlled by certain actuators.The results demonstrate that the proposed method is suitable and effective.
The optimization of actuators of an active control structure under seismic excitation is studied.The random excitation is generated by equivalent excitation method,and the state space control algorithm is employed to calculate the dynamic responses.An optimized procedure based on genetic algorithm is proposed,in which a 0-1 chromosome coding is used to resemble the spatial arrangement of actuators.Several typical cases are analyzed,in which the fitness objectives are composed of maximum acceleration response and maximum inter-story angle,while the structure is controlled by certain actuators.The results demonstrate that the proposed method is suitable and effective.
引文
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[2]欧进萍.结构振动控制——主动、半主动和智能控制[M].北京:科学出版社,2003.
[3]钟万勰,吴志刚,谭述君.状态空间控制理论与计算[M].北京:科学出版社,2007.
[4]林家浩,张亚辉.随机振动的虚拟激励法[M].北京:科学出版社,2006.
[5]孙作玉,王晖.结构振动分析的等效激励法[J].工程力学,2010(SI):20-22.
[6]TANG Yao,SUN Zuoyu,WANG Hui.Random vibration a-nalysis of controlled building based on the equivalent ex-citation method[C]∥Information Technology and Archi-tecture Engineering(ITAE 2012),2012,4:456-459.
[7]Holland J H.Adaptation in natural and artificial systems[M].Ann Arbor,Michigan:University of MichiganPress,1975.
[8]燕乐纬,蹇开林,黄晓刚.基于广义遗传算法的结构动力响应优化[J].工程力学,2008,25(7):57-65.
[9]燕乐纬,陈树辉.基于改进遗传算法的非线性方程组求解[J].中山大学学报:自然科学版,2011,50(1):9-13.
[10]燕乐纬,陈洋洋,周云.一种改进的微种群遗传算法[J].中山大学学报:自然科学版,2012,51(1):50-54.
[11]李宏男,曲激婷.基于遗传算法的位移型与速度型阻尼器位置优化比较研究[J].计算力学学报2010,27(2):252-257.
[12]薛素铎,王雪生,曹资.基于新抗震规范的地震动随机模型参数研究[J].土木工程学报,2003,36(5):5-10.
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