基于随机子空间算法的某大型斜拉桥的损伤预警系统研究  

Study on Damage Warning System of a Large Stayed Bridge Based on Stochastic Subspace Algorithm

作　　者：左翔文 Zuo Xiangwen(Sichuan Highway Planning,Survey and Design Research Institute Co.,Ltd.,Chengdu Sichuan 610041)

机构地区：[1]四川省公路规划勘察设计研究院有限公司,四川成都610041

出　　处：《现代工业经济和信息化》2021年第8期90-92,共3页Modern Industrial Economy and Informationization

摘　　要：通过将随机子空间算法和滑窗技术原理进行结合,并融入参数结果自动报警的思想,建立了一套基于频率值变化的损伤识别预警系统。该系统能够实现对斜拉桥的损伤报警,基本原理是当该桥梁结构的各阶频率值随着时间的推移出现较大波动时,则代表该桥梁结构受到了一定的损伤,此时需要立即对其进行全方位检测,以避免安全事故的发生。将该预警系统运用于某大型斜拉桥,结果表明,随机子空间算法具有可靠性,能够运用于实际工程中。By combining the random subspace algorithm with the sliding window technology principle and integrating the idea of automatic alarm, a damage recognition warning system based on frequency value change is established. The system can realize the damage alarm of the cable-stayed bridge. The basic principle is that when the frequency value of the bridge structure fluctuates greatly with time, the bridge structure is somewhat damaged, and it needs to be comprehensively tested immediately to avoid safety accidents. With a large cable-stayed bridge, the results show that the random subspace algorithm is reliable and can be used in practical engineering.

关 键 词：斜拉桥 随机子空间算法 滑窗技术 损伤识别 频率值 

分 类 号：U441[建筑科学—桥梁与隧道工程]