摘要
为了研究波浪力作用下海缆的动力学特性,建立了波浪力作用下海缆的三维有限元模型。首先利用SOLID185单元和pipe59单元建立了海缆模型,设置波浪力及海流速度;对该模型进行仿真计算,并对仿真结果进行数据提取,获得了海缆各层结构的位移、应力应变及光单元加速度等数据。通过对数据进行处理,得到波浪高0.1m、周期为1s、海流速为2m/s的条件下,光单元振动频率约为50Hz,为利用分布式光纤振动传感技术监测海缆的工作状态提供了理论参考。
In order to study the dynamic characteristics of submarine cable under wave force, a three-dimensional finite elementmodel of submarine cable under wave force is established. Firstly, the cable model is established by using SOLID185 elementand pipe59 element. Then the wave force and current velocity are set up. The model is simulated and the simulation result isextracted. The displacement, stress and strain of the submarine layer structure and optical unit acceleration data are obtained.Through the data processing, under the conditions of wave height of 0.1 m, period of 1 s, and sea speed of 2 m / s, the vibra-tion frequency of the optical unit is about 50 Hz, which provides a theoretical reference for monitoring the working state of sub-marine cable by distributed optical fiber vibration sensing technology.
出处
《光通信研究》
北大核心
2017年第4期30-34,共5页
Study on Optical Communications
基金
河北省自然科学基金资助项目(E2015502053)
国家自然科学基金资助项目(51407074)
中央高校基本科研业务费专项资金资助项目(2015ZD21)
关键词
光纤复合海底电缆
波浪力
振动频率
动力学分析
有限元
fiber-optic composite submarine cable
wave force
vibration frequency
dynamic analysis
finite element
