多重调谐冲击阻尼器的多目标优化设计研究

Multi-objective optimization design of multiple tuned impact dampers

为开发减震性能良好的新型阻尼器,将颗粒阻尼器与多重调谐质量阻尼器(multiple tuned mass dampers,MTMD)相结合,提出一种新型的多重调谐冲击阻尼器(multiple tuned impact dampers,MTID),并对其减震性能进行了优化和对比研究。首先,提出MTID应用于实际工程结构时基于性能的多目标优化设计方法及流程;然后,基于一个20层Benchmark结构,进一步分析了传统设计和优化设计MTID的振动控制性能;最后,对比研究了MTID和MTMD的最优减震性能及工作行程。研究表明,MTID需要一定的启动时间以高效发挥减震性能,待其启动后,可显著减小主体结构的动力响应;优化设计的MTID相比于传统设计具有更优异的减震性能,进而可显著减小主体结构在大震作用下的塑性变形和非线性损伤;MTID和MTMD的最优减震性能较为接近,但MTID的工作行程更小。

Here,to develop a new type of damper with good seismic reduction performance,a new type of multiple tuned impact dampers(MTID)was proposed by combining particle dampers with multiple tuned mass dampers(MTMD),and its seismic reduction performance was optimized and studied contrastively.Firstly,the performance-based multi-objective optimization design method and procedure when MTID was applied in practical engineering structures were proposed.Then,based on a 20-story benchmark structure,the vibration control performance of traditional design and optimal design of MTID was further analyzed.Finally,the optimal seismic reduction performance and working stroke of MTID and those of MTMD were studied contrastively.The results showed that MTID needs a certain start-up time to give full play to its seismic reduction performance;after its start-up,it can significantly reduce dynamic response of the main structure;compared with the traditional design,MTID for optimization design has better seismic reduction performance,it can significantly reduce plastic deformation and nonlinear damage of the main structure under large earthquakes;the optimal seismic reduction performance of MTID and that of MTMD are close to each other,but the working stroke of MTID is smaller.