基于湿重效应的网架罩棚结构动力性能分析  

Dynamic Performance Analysis of Grid Canopy Structure Based on Wet Weight Effect

作　　者：胡靖 贾亚军 林晓 HU Jing;JIA Ya-jun;LIN Xiao(Shandong Zhengyuan Digital City Construction Co,Ltd,Yantai 264670,China)

机构地区：[1]山东正元数字城市建设有限公司,烟台264670

出　　处：《建材世界》2025年第1期93-96,共4页The World of Building Materials

摘　　要：为探究服役期间网架罩棚结构的动力特性,论文通过环境激励和人工激励试验对网架罩棚结构的振动模态进行分析。通过网架罩棚结构的动力数据采集及分析可知:荷载激励下的结构频率随振型增大而增大,网架罩棚的阻尼随振型增大而降低。基于随机减量法得到的结构最不利位置位于网架罩棚的两侧,最大周期发生在1阶振型处,最大周期为0.508。最后根据理论计算的网架罩棚结构振型与实测振型进行对比,发现所提出的振型分析方法具有较高的可靠性,可为网架结构动力分析及安全性评价提供理论支持。In order to investigate the dynamic characteristics of the grid canopy structure during service,the vibration modes of the grid canopy structure are analyzed through environmental excitation and manual excitation tests.Through the collection and analysis of the dynamic data of the frame canopy structure,it can be seen that the frequency of the structure under load excitation increases with the increase of the vibration mode,and the damping of the frame canopy decreases with the increase of the vibration mode.Based on the random subtraction method,the most unfavorable position of the structure is located on both sides of the frame canopy,and the maximum period occurs at the first-order mode,with a maximum period of 0.508.Finally,it is found that the proposed method has high reliability and can provide theoretical support for the dynamic analysis and safety evaluation of the grid canopy structure.

关 键 词：动力响应 模态识别 健康检测 结构振型 湿重效应 

分 类 号：TU3[建筑科学—结构工程]