海底集矿机和移动输送站最小安全距离研究  

Numerical Analysis of the Minimum Safe Distance between Deep-Sea Mining Vehicle and Movable Storage

作　　者：魏明珠 郐艳荣 王旭[1] 周济福[1,2] WEI Mingzhu;KUAI Yanrong;WANG Xu;ZHOU Jifu(Key Laboratory for Mechanics in Fluid Solid Coupling Systems,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China;School of Engineering Sciences,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院力学研究所流固耦合系统力学重点实验室,北京100190 [2]中国科学院大学工程科学学院,北京100049

出　　处：《力学季刊》2020年第4期674-683,共10页Chinese Quarterly of Mechanics

基　　金：国家重点基础研究发展计划(2017YFC1404200);国家自然科学基金(11572332);中国科学院战略性先导科技专项A类(XDA22040304)。

摘　　要：海洋矿产资源的开发正由浅海向深海发展,水下输送管道作为深海采矿系统中的必备构件,其作业安全尤为重要.本文以6000m深海采矿工程为背景,研究了海底集矿机、海底移动输送站及连接两者的矿料输送管道的运动协调关系.首先,用悬链线理论得到输送管道的初始构形,基于有限元方法,构建了集矿机-输送管道-移动输送站系统三维动态响应模型,进而讨论了集矿机和移动输送站运动过程中,输送管道形态和应力的变化.结果表明,集矿机与移动输送站靠近时,输送管道的最大应力增长速度变快,威胁采矿系统的作业安全.基于此,提出了集矿机与移动输送站最小安全距离的概念,分析并给出了管道壁厚和材料屈服应力对最小安全距离的影响规律.The exploitation of marine mineral is developing from shallow to deep sea. The conveying pipe is an essential component of a deep sea mining system and its safety is of crucial importance for the system operation. Taking the 6000 m deep mining system as an example, this paper mainly studies the coordination of the motions of the vehicle and the movable storage. Firstly, a 3 D dynamic model is constructed based on finite element method to simulate the hydrodynamic response of the subsystem consisted of the mining vehicle, the conveying pipeline, and the movable storage. And the initial configuration of the conveying pipe is obtained by the catenary theory. Then, the relations between the configuration of the conveying pipe and the stress is discussed considering the operation of the mining vehicle and the movable storage. The simulation results show that the maximum Mise stress of the pile increases rapidly when the mining vehicle is close to the movable storage, which threatens the safety of the mining system. Based on this analysis, the minimum safe distance between the mining vehicle and the movable storage is concepted. And the influences of the yield stress and wall thickness of the pipe on the minimum safe distance is addressed.

关 键 词：深海采矿 集矿机 移动输送站 安全距离 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]