压电主动控制在空间结构动力失稳中的应用及试验研究
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摘要
针对传统空间网壳结构容易发生动力失稳现象以及不具备自我调节与自我控制的能力,提出了基于智能材料对网壳结构动力失稳进行主动控制的思路,推导了动力失稳主动控制的有限元方程,从理论上证明了通过主动控制,可以避开或减小结构动力失稳区域。进行了主动控制优化设计,随着主动杆件的增多,对动力失稳的控制效果增强,结构动力失稳主动控制一般需要基于多点控制;通过网壳结构动力失稳主动控制试验,结构整体的加速度和位移得到了良好的控制效果,使结构中的应力得到合理的重分布,结构的动力特性得到调整,其动力稳定性能得到提高。
Because of a traditional spatial latticed shell structure being prone to dynamic instability and without a self-adjust and self-control ability,a new idea to actively control dynamic instability of a spatial latticed shell structure based on intelligent material was proposed here.Then,the finite element equation for dynamic instability active control was derived.It was proved theoretically that through active control,the structureal dynamic instability region of a latticed shell can be avoided or reduced.The active control optimization design was performed.It was shown that with increase in active members,the control effect on dynamic instability is enhanced;the active control of structural dynamic instability is generally based on multipoint control;through structural dynamic instability active control tests for a latticed shell,its accelerations and displacements of the whole structure gain a good control effect,its structural stress gets reasonable redistribution,its structural dynamic characteristic is adjusted,and its dynamic stability performance is improved.
Because of a traditional spatial latticed shell structure being prone to dynamic instability and without a self-adjust and self-control ability,a new idea to actively control dynamic instability of a spatial latticed shell structure based on intelligent material was proposed here.Then,the finite element equation for dynamic instability active control was derived.It was proved theoretically that through active control,the structureal dynamic instability region of a latticed shell can be avoided or reduced.The active control optimization design was performed.It was shown that with increase in active members,the control effect on dynamic instability is enhanced;the active control of structural dynamic instability is generally based on multipoint control;through structural dynamic instability active control tests for a latticed shell,its accelerations and displacements of the whole structure gain a good control effect,its structural stress gets reasonable redistribution,its structural dynamic characteristic is adjusted,and its dynamic stability performance is improved.
引文
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[2]Singh M P,Matheu E E,Suarez L E.Active and semi-active control of structures under seismic excitation[J].Earthquake Engineering and Structural Dynamics,1997,26(2):193-213.
[3]陈应波,陈军明,吴代华.网壳结构在地震作用下的动力稳定研究[J].华中科技大学学报(自然科学版),2004,32(10):40-42.CHEN Ying-bo,CHEN Jun-ming,WU Dai-hua.Dynamic stability of reticulated shell under earthquake excitation[J].Journal of Huazhong University of Science and Technology(Nature Science),2004,32(10):40-42.
[4]曲淑英,张瑞丰,曲乃泗,等.阻尼与纵向共振对结构动力稳定的影响[J].应用力学学报,2002,19(2):94-96.QU Shu-ying,ZHANG Rui-feng,QU Nai-si,et al.Analysis of effect of damping and longitudinal resonance on structure dynamic stability[J].Chinese Journal of Applied Mechanics,2002,19(2):94-96.
[5]欧进萍,王刚,田石柱.海洋平台结构振动的AMD主动控制试验研究[J].高技术通讯,2002,12(10):85-90.OU Jin-ping,WANG Gang,TIAN Shi-zhu.Experimental research on AMD control of structural vibration of offshore platform[J].High Technology Letters,2002,12(10):85-90.
[6]王社良,马乾瑛,朱军强,等.一种压电套筒式拉压双向受力主动抗震控制装置[P]:200910254589.7.2010.06.16.
[7]Mehrabian A R,Shahi H,Yousefi-Koma A.An optimal approach to active vibration control of smart structures[M].Proceedings of the IASTED International Conference on Modelling and Simulation.Montreal,QC,Canada:Acta Press,2007:501-506.
[8]冷振波,姜哲.有源控制解耦中压电作动器位置优化[J].噪声与振动控制,2011,31(5):126-129.LENG Zhen-bo,JIANG Zhe.Location optimization of piezoelectric actuators for active control decoupling based on the theory of radiation modes[J].Noise and Vibration Control,2011,31(5):126-129.
[9]Fu W J,Zhu C M,Ye Q T.Application of multi-objective genetic algorithm to integrated plant/controller optimization for active guide roller design[J].Zhen dong Gong cheng Xue bao/Journal of Vibration Engineering,2006,19(2):227-233.
[10]孟祥众,石秀华,杜向党.基于遗传算法的振动主动控制优化方法研究[J].计算机测量与控制,2008,16(1):74-77.MENG Xiang-zhong,SHI Xiu-hua,DU Xiang-dang.Research of active vibration control optimization based on genetic algorithm[J].Computer Measurement&Control,2008,16(1):74-77.
[11]Adachi K,Awakura Y,Iwatsubo T.Active control effort of hybrid piezoelectric absorber for structural control[J].Applied Acoustics,2004,65(3):277-292.
[12]王社良,田秀婷,代建波,等.基于可控性柱面网壳结构主动控制作动器布置的优化研究[J].振动与冲击,2011,30(9):50-54.WANG She-liang,TIAN Xiu-ting,DAI Jian-bo,et al.Optimal placement of actuators for active vibration control of cylindrical reticulated shells based on controllability[J].Journal of Vibration and Shock.2011,30(9):50-54.
[13]李东旭.大型挠性空间桁架结构动力学分析与模糊振动控制[M].北京:科学出版社,2008.
[14]Birman V.Active control of composite plates using piezoelectric stiffeners[J].International Journal of Mechanical Sciences,1993,35(5):387-396.
[15]杜园芳,王社良,张博.基于耦合模态控制算法对空间结构主动控制的试验研究[J].华中科技大学学报(城市科学版),2010,27(4):8-11.DU Yuan-fang,WANG She-liang,ZHANG Bo.Experimental study for space structures based on coupled modal arithmetic active control[J].Journal of Huazhong University of Science and Technology Urban Science,2010,27(4):8-11.
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