变阻尼半主动振动控制算法减震效果计算研究

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

摘要: 建立了一栋20层结构变阻尼半主动控制的分析模型，并利用Matlab语言编制了求解软件。计算结果表明：变阻尼半主动控制对层间位移、楼层位移、楼层速度、楼层加速度有较明显的减震效果，可以通过调整其参数指标cdmax达到目标减震效果。cdmax越大，层间位移及楼层位移动力反应减震效率越高。减震效率可达到25%~45%，且减震效率沿房屋高度分布均匀。最优Bang-Bang控制力基本与简单Bang-Bang相同，但普遍比简单Bang-Bang控制力稍大。

Abstract: A theoretical analyzing approach about vibration mitigation system, a 20 storey structure with variable dampers, was presented, and it was solved with software prepared with Matlab language. Results show that the system could have more notable vibration mitigation effect, which could still be optimized with reasonable increase of cdmax. A larger cdmax corresponds to larger seismic mitiga-tion efficiency and larger semi-control forces. Seismic mitigation efficiency was generally 25% - 45%, with relatively even distribution along structural height. Semi-active control forces for both simple Bang-Bang and optimized Bang-Bang are approximately the same, with ones for optimized Bang-Bang slightly larger.