压电主动控制在空间结构动力失稳中的应用及试验研究  

Applying intelligent active control to reduce dynamic instability of a spatial latticed shell structure

作　　者：马乾瑛[1] 王社良[2] 朱军强[2] 熊二刚[1] 

机构地区：[1]长安大学建筑工程学院,西安710061 [2]西安建筑科技大学土木工程学院,西安710055

出　　处：《振动与冲击》2013年第17期123-127,176,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(51208041;51178388;10972168;51008245;51108035);国家重点实验室开放项目(11JS061);长安大学2013年大学生创新创业训练计划(201310710052)

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.

关 键 词：网壳 动力稳定 主动控制 试验 

分 类 号：TU352.1+1[建筑科学—结构工程] TU317+.1