结构连续变刚度控制有效性分析  

EFFECTIVENESS OF CONTINUOUSLY VARIABLE STIFFNESS SYSTEM

作　　者：杨润林[1] 闫维明[2] 周锡元[2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]北京工业大学工程抗震与结构诊治重点试验室,北京100022

出　　处：《振动与冲击》2008年第3期22-25,共4页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(50508003)

摘　　要：作为半主动控制系统的经典范例之一,变刚度控制系统已经在结构控制领域得到了广泛的认可,但是近来的研究显示传统变刚度控制系统抑振频带窄,而且对于加速度控制是不利的。鉴于此,拟研究提出一种新型的变刚度控制系统以提高其控制性能。首先通过反应谱分析了常规变刚度控制系统的不足,然后在此基础上提出一种新型的半主动连续变刚度控制(SCVS)系统以克服上述缺陷,并进行了相应的数值模拟。数值计算结果验证了该系统的有效性。建议系统相比传统变刚度控制系统不仅可以大幅拓宽控制系统的抑振频带,而且有利于同时提高地震激励下结构位移反应和加速度反应的控制性能。因此,相比传统的变刚度控制系统,建议系统更为有效。The paper aims to develop an innovative system to improve the performance of the traditional AVS system, which bears the disadvantage of limited narrow bandwidth frequency-adjustment capability. The deficiencies of the traditional AVS system were analyzed by using seismic response spectra. Then an innovative semiactive continuously variable stiffness (SCVS) system was presented and its performance and effectiveness were illustrated by numerical examples. It is demonstrated that, compared with the traditional AVS system, the adjustable frequency bandwidth of the proposed system is significantly increased, and the displacement and the acceleration responses of the structure are further decreased simultaneously.

关 键 词：振动控制 土木工程 半主动控制 变刚度系统 地震激励 

分 类 号：TU352.11[建筑科学—结构工程] O328[理学—一般力学与力学基础]