摘要
裸光纤光栅与电阻应变计相比具有体积小、防水、抗电磁干扰等优点,利用其在高压孔隙水环境下进行应变测试理论上是可行的。以相关课题试验研究为背景,进行了高孔隙水压下裸光纤光栅应变测试的研究。首先通过试验研究,根据裸光纤光栅应变灵敏度系数与长期稳定性选择合适的胶黏剂,在此基础上利用裸光纤光栅对高孔隙水压力下的模型井壁外缘切向应变进行测量,通过与井壁内缘的电阻应变计测值对比发现,二者测值非常接近,试验表明高水压下裸光纤光栅应变测试是可行的,具有足够的灵敏度与精度,同时发现粘贴工艺的标准化、胶黏剂的选择以及裸光纤光栅的存活率是影响测试成败的重要因素。
Bare Fiber Bragg grating（FBG） as the test components is smart size, waterproof and resistance to electromagnetic compared with the resistance strain gauge （RSG）, which make strain tests under the high pore water pressure be possible. Taking corresponding experiment as background, strain tests of bare FBG under the high pore water pressure was studied. First, the effect of different kinds of adhesives on strain sensitivity coefficient and long﹣term stability of bare FBG was analyzed. At last, the HY- 914 was adopt as adhesive of bare FBG to apply to the experiment of hydraulic load of structure in porous rock aquifer. Compared with RSG, it is found that both measured values are close and the change trends are same to each other, strain tests of bare FBG under high pore water pressure is feasible, sensible and precise. Standardization process, kind of adhesives and survival rate are important factors affecting success of model test.
出处
《红外与激光工程》
EI
CSCD
北大核心
2014年第11期3729-3734,共6页
Infrared and Laser Engineering
基金
国家高科技研究发展计划(2012AA06A401)
中央高校基本科研业务费专项资金
