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| 深海海底钻机收放系统动力学建模与数值分析 |
| Dynamic modeling and numerical analysis of launch and recovery system of seafloor drill |
| 投稿时间：2023-11-17 修订日期：2024-03-15 |
| DOI： |
| 中文关键词: 海底钻机 收放系统 波浪 洋流 |
| 英文关键词: seafloor drill launch and recovery system wave current |
| 基金项目:国家重点研发计划(2022YFC2805904)；国家自然科学基金项目（52275106）；湖南创新型省份建设专项经费资助(2020GK1021) |
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| 中文摘要: |
| 深海海底钻机入海作业需要通过缆绳下放、回收，海洋复杂环境作用下波浪和洋流对其收放过程安全性、准确性有着重要影响，开展海底钻机收放系统动力学建模与响应分析研究无疑具有重要意义。首先，开展复杂海况条件下波浪和洋流特性分析，建立海洋环境中波浪和洋流的数学模型；然后，以母船和深海海底钻机之间的铠装脐带缆为对象，基于集中质量法建立计入波浪力和洋流力的缆绳收放系统动力学模型；最后，采用四阶龙格库塔方法进行数值求解，并在不同海况和水深条件下，分析不同波浪和洋流方向下的深海海底钻机摆动规律和铠装脐带缆张力响应规律。仿真分析结果表明：深海海底钻机摆动轨迹呈现椭圆形状，其长轴方向与波浪方向大体一致；铠装脐带缆最大张力发生在铠装脐带缆收放架端；随着工作水深增加，深海海底钻机最大偏移量和铠装脐带缆最大张力直线增加；随着海况等级增加，深海海底钻机最大偏移量和铠装脐带缆最大张力增加明显；波浪方向、洋流方向对深海海底钻机收放系统动态响应有一定影响，深海海底钻机发生最大偏移量方向取决于波浪方向，但是他们对深海海底钻机最大偏移量和铠装脐带缆最大张力的影响随着工作水深增加而衰弱。 |
| 英文摘要: |
| A seafloor drill needs to be launched and recovered by cables for operation in the sea. The wave and the current under the complex marine environment have an important influence on the safety and accuracy of the launch and recovery system of seafloor drill. Therefore, it is undoubtedly important to carry out research on the dynamic modeling and response analysis of the launch and recovery system of seafloor drill. Firstly, the mathematical model of wave and current is established based on the characteristic analysis of the wave and the current under complex sea state conditions. Secondly, The armored umbilical cables between the ship and the seafloor drill are chosen as the study object, and the dynamic model of the cable launch and recovery system considering ocean wave force and current force is established based on the lumped mass method. Finally, the fourth-order Runge-Kutta method is used to solve the dynamic model. Under different sea state conditions and water depth conditions, the pendulum rules of the seafloor drill and the tension of the umbilical cable under different ocean wave and current directions are calculated and analyzed. The research results show that the pendulum track of the seafloor drill is elliptical, and its long axis direction is roughly consistent with the wave direction. The maximum tension of the armored umbilical cable occurs at the cable hoist boom. The maximum offset of the seafloor drill and the maximum tension of the armored umbilical cable increase linearly as the working water depth increases. With the increase of sea state level, the maximum offset of the seafloor drill and the maximum tension of armored umbilical cable increase significantly. The wave direction and current direction have some influence on the dynamic response of the launch and recovery system of seafloor drill, and the direction of the maximum offset occurring in seafloor drill depends on the wave direction, but their influence on the maximum offset of the seafloor drill and the maximum tension of armored umbilical cable weakens with the increase of working water depth. |
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