Zhou Jinghai, Sun Li, Li Hongnan
School of Civil Engineering, Dalian University of Technology, Dalian 116024, China ; School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China.
School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China.
ScientificWorldJournal. 2014;2014:808075. doi: 10.1155/2014/808075. Epub 2014 May 26.
The field of structural health monitoring is concerned with accurately and reliably assessing the integrity of a given structure to reduce ownership costs, increase operational lifetime, and improve safety. In structural health monitoring systems, fiber Bragg grating (FBG) is a promising measurement technology for its superior ability of explosion proof, immunity to electromagnetic interference, and high accuracy. This paper is a study on the dynamic characteristics of fiber Bragg grating (FBG) sensors applied to a submarine pipeline, as well as an experimental investigation on a laboratory model of the pipeline. The dynamic response of a submarine pipeline under seismic excitation is a coupled vibration of liquid and solid interaction. FBG sensors and strain gauges are used to monitor the dynamic response of a submarine pipeline model under a variety of dynamic loading conditions and the maximum working frequency of an FBG strain sensor is calculated according to its dynamic strain responses. Based on the theoretical and experimental results, it can be concluded that FBG sensor is superior to strain gauge and satisfies the demand of dynamic strain measurement.
结构健康监测领域致力于准确且可靠地评估给定结构的完整性，以降低所有权成本、延长使用寿命并提高安全性。在结构健康监测系统中，光纤布拉格光栅（FBG）因其卓越的防爆能力、抗电磁干扰能力和高精度，成为一种很有前景的测量技术。本文研究了应用于海底管道的光纤布拉格光栅（FBG）传感器的动态特性，并对管道实验室模型进行了实验研究。海底管道在地震激励下的动态响应是液固相互作用的耦合振动。利用FBG传感器和应变片监测海底管道模型在各种动态载荷条件下的动态响应，并根据其动态应变响应计算FBG应变传感器的最大工作频率。基于理论和实验结果，可以得出FBG传感器优于应变片且满足动态应变测量需求的结论。
