朱保兵
（上海建筑设计研究院有限公司，上海200041）

[摘要] 拉索结构系统在外部激励下作用下将产生低频谐振，会导致大的振幅而可能有破坏性事故发生，故需要一种有效的方法控制这种振动。而在拉索的锚座处沿拉索轴向实施主动控制却是一种很好的方法。本文在考虑拉索抗弯刚度的基础上，建立了拉索振动主动控制模型。通过线性二次型最优控制(LQR)策略对拉索振动实施了主动控制仿真计算，分析了抗弯刚度对拉索振动主动控制的影响，使该控制方法更适合在工程实际中应用。
[关键词] 拉索；低频谐振；抗弯刚度；主动控制

Effect of cables bending stiffness on active vibration control
Zhu Baobing
(Shanghai Institute of Architectural Design and Research Co., Ltd., Shanghai 200041, China)

Abstract: Large amplitudes of cables can be induced by low order frequency harmonic oscillations. Then, some destructive accidents will happen, and some efficient control methods will be needed. Axial active control at the boundary, i.e., cables anchorage, is an attractive approach. Considering the bending stiffness of cables, active vibration control model ofcables is given. Based on linear quadratic optimal control strategy, active vibration control ofcables is simulated. Effect of cables bending stiffness on active vibration controlis analyzed.Therefore,the control method can be better used in future practice.
Keywords: cables; low order frequency harmonic oscillations; bending stiffness; active control