CAJ | 학술논문

由于其水平跨距过大等问题,外输系统中的输油管在模型试验中需要进行水平截断,而目前相关研究中没有一种明确的截断方法. 基于输油管静力特性等效提出一种适用于大跨距输油管水平截断方法,从而解决了深海外输系统中的输油管难以在常规海洋工程水池进行模型试验的问题. 并应用此方法对西非海域输油管系统进行等效截断方案设计,进行了外输系统截断模型试验. 试验结果证明该水平截断方法具有很好的可行性并且能够较好的反映原输油管系统的特性. 在此基础上通过数值模拟和试验结果对比分析的方法进行了输油管动态张力特性的参数分析,发现数值模型中输油管的静力特性能够准确预测,而正确模拟其动态张力的关键在于输油管阻尼系数和附加质量系数的选择.
유우기수평과거과대등문제,외수계통중적수유관재모형시험중수요진행수평절단,이목전상관연구중몰유일충명학적절단방법. 기우수유관정력특성등효제출일충괄용우대과거수유관수평절단방법,종이해결료심해외수계통중적수유관난이재상규해양공정수지진행모형시험적문제. 병응용차방법대서비해역수유관계통진행등효절단방안설계,진행료외수계통절단모형시험. 시험결과증명해수평절단방법구유흔호적가행성병차능구교호적반영원수유관계통적특성. 재차기출상통과수치모의화시험결과대비분석적방법진행료수유관동태장력특성적삼수분석,발현수치모형중수유관적정력특성능구준학예측,이정학모의기동태장력적관건재우수유관조니계수화부가질량계수적선택.
Due to its large horizontal span, the oil offloading line ( OOL) for an offloading system needs to be trun-cated horizontally in the physical model test. But there is no specific truncation method reported for OOL in the cur-rent literatures. Based on the static equivalent principle, a horizontal truncation method applied to OOL with a large horizontal span was proposed here. This solved the problem that OOL could not be modeled in regular Ocean Engi-neering Basin because of its large horizontal span. By using this method, an equivalent truncation plan was designed for the OOL system in the West Africa Sea, and offloading system model tests were carried out. The experimental results prove that the horizontal truncation method has good feasibility and it can better reflect the characteristics of OOL prototypes. Further, parameter analysis was done on OOL tension characteristics, by comparing the numerical and model test results, showing that the static tension can be predicted well in the numerical model. The damping coefficient and the added mass coefficient of OOL are the key factors to be selected for simulating the OOL dynamic tension correctly.