随机激励作用下被控结构的阻尼器优化布置
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摘要
以结构在随机激励作用下的振动控制问题为研究对象.通过等效激励法构造具备随机谱特征的等效地震荷载时程作为输入,从而将频域范围内的结构随机振动控制问题转化为时域问题进行计算分析.利用遗传算法的0,1染色体编码模拟阻尼器的楼层空间布置,实现了阻尼器数目指定情况下,以楼层最大加速度和层间位移角为控制目标函数的阻尼器最优布置方案.仿真分析表明:该优化措施针对性强,效果显著.
In the paper,the optimization of dampers of a controlled structure under seismic excitation is studied,the equivalent excitation method is employed to simulate the earthquake excites,while a hybrid control is conducted by using dampers and an actuator.To improve the efficacy of the optimization,a 0-1 chromosome coding of genetic algorithm is used to represent the spatial arrangement of dampers.Several typical cases are calculated through adjusting the fitness objectives composed by maximum acceleration responses and maximum inter story angles.The simulation results show that the proposed method has some plausible features for engineering application.
In the paper,the optimization of dampers of a controlled structure under seismic excitation is studied,the equivalent excitation method is employed to simulate the earthquake excites,while a hybrid control is conducted by using dampers and an actuator.To improve the efficacy of the optimization,a 0-1 chromosome coding of genetic algorithm is used to represent the spatial arrangement of dampers.Several typical cases are calculated through adjusting the fitness objectives composed by maximum acceleration responses and maximum inter story angles.The simulation results show that the proposed method has some plausible features for engineering application.
引文
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[8]TANG Y,SUN Z Y,WANG H.Random vibration analysis of controlled building based on the equivalent excitation method[C]∥Information Technology and Architecture Engineering(ITAE 2012),2012(4):456-459.
[9]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.LI H N,QU J T.Comparison of optimal placement of displacement-based and velocity-based dampers using genetic algo-rithm[J].Chin J Computat Mech,2010,27(2):252-257.
[10]GB50011-2010建筑抗震设计规范[S].GB50011-2010 Code for seismic design of buildings[S].
[11]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.XUE S D,WANG X S,CAO Z.Parameters study on seismic random model based on the new seismic code[J].China CivilEngineer J,2003,36(5):5-10.
[2]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.LIN J H,ZHANG Y H.Pseudo-excitation method for random vibration[M].Beijing:Science Press,2006.
[3]孙作玉,王晖.结构振动分析的等效激励法[J].工程力学,2010,127:20-22.SUN Z Y,WANG H.Equivalent excitation method for random structural vibration analysis[J].Engineer Mech,2010,127:20-22.
[4]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.OU J P.Structural Vibration Control—active,semi-active and intelligent control[M].Beijing:Science Press,2003.
[5]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.ZHONG W X,WU Z G,TAN S J.State space control theory and calculation[M].Beijing:Science Press,2007.
[6]CLOUGH R W,PENZIEN J.Dynamics of Structures[M].2nd Ed.New York:McGraw-Hill,Inc,1993.
[7]陈国兴,金永彬,宰金珉.高层建筑随机地震反应的简捷计算[J].南京建筑工程学院学报,1999,(1):29-37.CHEN G X,JIN Y B,ZAI J M.A Simple Method of Random Earthquake Response Analysis for High-Rise Buildings[J].J Nanjing Archit Civil Engineer Instit,1999,(1):29-37.
[8]TANG Y,SUN Z Y,WANG H.Random vibration analysis of controlled building based on the equivalent excitation method[C]∥Information Technology and Architecture Engineering(ITAE 2012),2012(4):456-459.
[9]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.LI H N,QU J T.Comparison of optimal placement of displacement-based and velocity-based dampers using genetic algo-rithm[J].Chin J Computat Mech,2010,27(2):252-257.
[10]GB50011-2010建筑抗震设计规范[S].GB50011-2010 Code for seismic design of buildings[S].
[11]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.XUE S D,WANG X S,CAO Z.Parameters study on seismic random model based on the new seismic code[J].China CivilEngineer J,2003,36(5):5-10.
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