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基于NSGA-Ⅱ的巨-子结构层间隔震体系优化分析

, PP. 187-193

Keywords: 巨-子结构,层间隔震体系,NSGA-Ⅱ,复模态,随机振动,优化分析

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Abstract:

对巨-子结构中子结构采用层间隔震策略,形成巨-子结构层间隔震体系。建立了该新型隔震体系的分析模型与运动方程,采用复模态方法在随机域内推导了该体系的随机地震响应方差。基于NSGA-Ⅱ算法提出了巨-子结构层间隔震体系参数优化流程,仿真分析表明了该优化设计方法的准确性与高效性。对巨-子结构层间隔震体系的进一步研究表明,随子结构质量比增大,其减震工作机理也相应地从调谐转化为耗能隔震。此外,时程分析也表明巨-子结构采用层间隔震策略后,主结构和子结构的地震响应均得到了较好的控制,且体系的输入能、动能、变形能和主结构自身耗能均有较大程度的下降。

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