变刚度半主动振动控制算法计算研究

Computation Study on Algorithm for Structural Semi-Active Vibration Control with Variable-Stiffness System

建立了一栋20层变刚度半主动控制结构体系的地震反应分析模型。利用MATLAB语言编写了求解软件。计算结果表明:变刚度半主动控制对结构的层间位移和楼层位移有较好的减震效果,通过调整变刚度参数指标kv可以达到最优的减震效果,对层间位移的减震效率可达到35%～50%,且沿楼层高度分布均匀,kv越大,其减震效果越明显。对楼层加速度的减震效果不佳,对有加速度要求的结构不适宜用此算法。

A theoretical analyzing approach about vibration mitigation system,a 20 storey structure with variable-stiffness system,is presented,and it is solved with software prepared with Matlab language. The results show that the system could have more notable vibration mitigation effect,which could still be optimized with reasonable increase of kv. A larger kvcorresponds to larger seismic mitigation efficiency and larger semi-control forces. Seismic mitigation efficiency is generally 35% ~ 50%,with relatively even distribution along structural height. It might be recognized that seismic mitigation efficiency for storey acceleration is not satisfied.Bang-Bang algorithm for variable-stiffness system is not recommended for application on buildings with necessity of acceleration mitigation.