(1. 湖南城市学院 机械与电气工程学院，益阳 413000；
2. 中国石油大学(华东) 海洋油气装备与安全技术研究中心，青岛 266580；
3. 长沙矿山研究院有限责任公司 海洋采矿研究所，长沙 410012；
4. 长沙矿冶研究院有限责任公司 深海矿产资源开发利用技术国家重点实验室，长沙 410012)
摘 要: 海洋内波对中间仓海上收放作业的安全带来了极大挑战。基于有限元方法建立了内波和海流联合作用下中间仓单体收放过程的有限元分析模型，并采用Newmark法对模型进行了数值求解，分析了中间仓收放过程中的冲击响应以及管柱形态、张力、等效应力、上部转角和月池处偏移等因素。结果表明：在各项因素中，顶部张力受内波影响小，等效应力、上部转角和月池处偏移受内波影响大；收放作业过程中硬管等效应力最大位置发生于悬挂点附近；上部转角和月池处偏移是影响作业安全的限制因素，内波上层流方向与海流同向工况是实施收放作业的危险工况，中间仓入水0~300 m深度是收放过程的危险深度区域。
关键字: 深海采矿；中间仓；内波；有限元分析
（1. School of Mechanical and Electrical Engineering, Hunan City University, Yiyang 413000, China;
2. Centre for Offshore Engineering and Safety Technology, China University of Petroleum, Qingdao 266580, China;
3. Ocean Mining Research Institute, Changsha Research Institute of Mining and Metallurgy Co., Ltd., Changsha 410012, China;
4. State Key Laboratory of Exploitation and Utilization of Deep-Sea Mineral Resources, Changsha Research Institute of Mining and Metallurgy Co., Ltd., Changsha 410012, China）
Abstract:The marine internal waves have brought great challenges to the safety of deep-sea mining buffer retrieve/deployment operations. Based on the finite element method, a finite element model of the buffer retrieve/deployment operations under the combined action of internal waves and currents was established, and the Newmark method was used to solve the model. The transient response and factors, such as string shape, tension, equivalent stress, upper rotation and offset, at the moon pool position in the retrieve/deployment process of the buffer were analyzed. The results show that, among the factors, the equivalent stress, upper rotation and offset at the moon pool position are greatly affected by internal waves while the top tension is less affected by internal waves. The maximum equivalent stress of hard pipe occurs near the suspension point; the upper rotation and offset at the moon pool position are the limiting factors affecting operation safety. The condition that the internal wave combined with the same direction current is the dangerous condition for the buffer retrieve/deployment operations, and the stage that the buffer stayed in the water depth range of 0-300 m is the dangerous stage.
Key words: deep-sea mining; buffer; internal solitary wave; finite element analysis
