考虑舒适度的大跨楼盖MTMD系统混合优化设计

发布时间：2018-04-11 07:20

本文选题：人行荷载 + 大跨楼盖　；参考：《振动工程学报》2017年05期

【摘要】：围绕大跨楼盖多重调谐质量阻尼器(Multiple Tuned Mass Dampers,MTMD)系统的设计方法开展研究。首先,建立了某高铁站房商业夹层的结构有限元模型,对其动力特性和振动舒适度进行了分析;随后,基于遗传算法(Genetic Algorithm,GA)和模式搜索算法(Pattern Search,PS)构建了混合优化算法A(Hybrid Algorithm A,HA)和混合优化算法B(Hybrid Algorithm B,HB),并基于此建立了大跨楼盖MTMD减振优化设计方法;最后,通过数值算例对比了4种算法的寻优能力和稳定性,并分析了设置MTMD系统后,大跨楼盖加速度响应的分布和衰减规律。研究表明,对于质量、刚度等分布不均匀的复杂大跨楼盖,振动响应规律与一般楼盖有一定的差异;在相近的重分析次数下,利用HA得到的最优值平均为0.653,小于利用GA和PS得到的结果;设置MTMD系统后,大跨楼盖响应较大区域内的节点加速度均有所降低,最大衰减超过了30%。
[Abstract]:The design method of multiple Tuned Mass dampers (MTMD) system for long span floor floor is studied.Firstly, the finite element model of a commercial sandwich structure of a high-speed railway station is established, and its dynamic characteristics and vibration comfort are analyzed.Based on genetic algorithm GA( genetic algorithm) and pattern search algorithm (pattern search PSN), a hybrid optimization algorithm, A(Hybrid Algorithm algorithm, and a hybrid optimization algorithm, B(Hybrid Algorithm MTMD, are constructed. Based on this, an optimal design method of MTMD vibration reduction for long span floor is established.The optimization ability and stability of the four algorithms are compared by numerical examples, and the distribution and attenuation of acceleration response of large span floor are analyzed with MTMD system.The results show that the vibration response law of complex long-span floor with uneven mass and stiffness distribution is different from that of general floor.The average optimum value obtained by HA is 0.653, which is smaller than that obtained by GA and PS, and the node acceleration in large area of large span floor response decreases with MTMD system, and the maximum attenuation exceeds 30%.
【作者单位】：苏州科技大学江苏省结构工程重点实验室;东南大学混凝土及预应力混凝土结构教育部重点实验室;北京建筑大学土木与交通学院;河海大学土木与交通学院;
【基金】：国家自然科学基金资助项目(51408389,51278106) 江苏省自然科学基金资助项目(BK20140281,BK20161581) 江苏省结构工程重点实验室开放课题(ZD1304) 江苏省“青蓝工程”
【分类号】：TU311.3

【相似文献】