基于分布式光纤传感技术的结构侵彻毁伤监测技术研究  

Research on structural penetration damage monitoring technology based on distributed fiber optic sensing technology

作　　者：黄李杰 吴华杰 张鏖 赵智宏 徐华栋 HUANG Lijie;WU Huajie;ZHANG Ao;ZHAO Zhihong;XU Huadong(Defense Engineering Institute,AMS,PLA;State Key Laboratory of Target Vulnerability Assessment,Defense Engineering Institute,AMS,PLA)

机构地区：[1]军事科学院国防工程研究院 [2]军事科学院国防工程研究院目标易损性评估全国重点实验室

出　　处：《防护工程》2024年第6期67-73,共7页Protective Engineering

摘　　要：利用光纤传感技术实时监测混凝土靶体在不同动能武器侵彻速度下的应变响应与损伤特征,探索一种高效的侵彻损伤检测方法,以评估防护工程结构在武器打击下的破坏情况。试验采用直径和高度均为1.5 m的混凝土靶体,设置了400、600和800 m/s 3种侵彻速度。通过分布式光纤传感网络,实时捕捉混凝土内部的应变信号变化,并结合光纤断裂信息分析侵彻深度、破坏范围及弹体的偏转情况。同时,还引入光纤光栅应变传感器,检测高速侵彻下的应变变化。结果表明,分布式光纤传感技术能够有效捕捉混凝土内部的应变信号,其测得的侵彻深度和破坏范围与实际值高度一致,同时光纤光栅应变传感器在高速侵彻监测中也表现出良好的抗干扰能力和稳定的应变测量特性。This paper aims to utilize fiber optic sensing technology to monitor the strain response and damage characteristics of concrete targets under different penetration velocities of kinetic energy weapons in real-time,exploring an efficient method for detecting penetration damage to assess the structural integrity of protective engineering under weapon strikes.The experiments were conducted using a concrete target with a diameter and height of 1.5 meters.The penetration velocities of 400 m/s,600 m/s and 800 m/s were set up.A distributed fiber optic sensing network was employed to capture the real-time changes in strain signals within the concrete,and combined with fiber breakage information to analyze penetration depth,damage extent,and projectile deflection.Additionally,fiber Bragg grating strain sensors were introduced to detect strain variations under high-speed penetration.The results indicate that distributed fiber optic sensing technology can effectively capture strain signals within the concrete,and the measured penetration depth and damage extent are highly consistent with actual values.Furthermore,the fiber Bragg grating strain sensors demonstrated excellent anti-interference capability and stable strain measurement characteristics during high-speed penetration monitoring.

关 键 词：分布式光纤传感技术 毁伤监测 光纤光栅 

分 类 号：TU317[建筑科学—结构工程]