大型低速风洞结构健康监测系统

Structural Health Monitoring System for Large Low Speed Wind Tunnel

为提高风洞调试和运行时的结构安全性,设计研制一种大型低速风洞结构健康监测系统。针对风洞监测对象位置散、可移动的特点,对结构健康监测(structural health monitoring,SHM)需求进行精准分析。在分析基础上,系统采用基于光纤环网和星形连接的混合网络架构,实现对分散结构状态数据的分布式采集、边缘计算和高效传输。运行系统表明:该系统在消声室流致振动监测评估、防护网拦截异物监测诊断等方面发挥了显著作用,有力保障了大型低速风洞运行安全。

In order to improve the structural safety of wind tunnel during commissioning and operation,a structural health monitoring system for large low-speed wind tunnel is designed and developed.According to the characteristics of scattered and movable monitoring objects in wind tunnel,the requirements of structural health monitoring(SHM)are analyzed accurately.Based on the analysis,the system adopts the hybrid network architecture based on optical fiber ring network and star connection to realize the distributed acquisition,edge computation and efficient transmission of the distributed structure state data.The operation system shows that the system plays a significant role in the monitoring and evaluation of flow-induced vibration in the anechoic chamber and the monitoring and diagnosis of foreign bodies intercepted by the protective net,and effectively guarantees the operation safety of the large low-speed wind tunnel.