【作者】 胡永乐； 陈子辰； 王文； 金飞华； 蒋诚志；

【Author】 HU Yong-le1,2,CHEN Zi-chen1, WANG Wen1, JIN Fei-hua2, JIANG Cheng-zhi3 (1. College of Mechanical and Energy, Zhejiang University, Hangzhou 310027, China; 2.Northwest Institute of Nuclear Technology, Xi’an 710024, China; 3. State Key Laboratory of Precision measuring Technology and Instruments, Tianjin 300072, China)

【机构】 浙江大学机械与能源工程学院； 西北核技术研究所； 天津大学精密测试技术与仪器国家重点实验室；

【摘要】 爆炸容器在内部爆炸载荷作用下的动态径向变形参数是进行动态响应分析、破坏概率、工作极限和运行寿命评估的基础。基于激光多普勒效应的动态测量技术具有精度高、信噪比高、动态响应快、线性好、量程范围大和非接触等优点。为了获得爆炸容器径向变形参数,设计了远距离非接触激光多普勒纵向位移测量系统,利用高斯光束理论和束腰特性优化了光路结构,根据爆炸容器径向变形的特点,研究了相应的数字滤波和频谱分析方法,实现了高速位移的动态测量。系统的位移测量范围为-30m到+30mm,速度变化范围为-10m/s到+20m/s,遥测距离为4.5m。爆炸容器在内部爆炸载荷作用下的径向变形测试结果表明测试系统性能是可靠的。更多还原

【Abstract】 Dynamic radial deformation parameter is the foundation for conducting theoretic dynamic response analysis and estimation of the fracture probability, working limit and operational life of explosion containment vessels(ECVs) subjected to internal blast loading. The dynamic measurement based on Laser Doppler effect has the advantages of high accuracy, high SNR, quick dynamic response, good linearity, large measurement range and no contact. In order to obtain the parameters of radial deformation of ECVs, the remote and contactless longitudinal displacement measurement system based on Laser Doppler effect has been designed. The optical diagram of the system has been optimized based on Gaussian beam theory and the characteristics of beam waist. According to the characters of ECVs deformation, corresponding ways of digital filtering and spectrum analysis have been studied to realize dynamic measurement of displacement with high speed. The displacement measurement range is from -30mm to +30mm, and that of changing speed is from -10m/s to +20m/s, and remote measurement distance reaches 4.5m. The experimental results of radial deformation of ECVs under internal explosive blast loading show that the performance of the measurement system is reliable.更多还原