水下锚系观测系统着底动力学时域分析  

Time Domain Analysis of Landing Dynamics for Submerged Mooring Observe System

作　　者：唐松 米智楠[1] 李伟雄[1] 陈建平[1] 金璐[2] TANG Song;MI Zhi-nan;LI Wei-xiong;CHEN Jian-ping;JIN Lu(School of Mechanical Engineering,Tongji University,Shanghai 201804,China;China National Scientific Seafloor Observatory Project Office,Shanghai 200092,China)

机构地区：[1]同济大学机械与能源工程学院,上海201804 [2]同济大学国家海底科学观测系统项目办公室,上海200092

出　　处：《液压气动与密封》2021年第4期39-44,共6页Hydraulics Pneumatics & Seals

基　　金：国家重点研发计划资助项目(2018YFC1405803);上海市科技创新支持项目(2019-jmrh1-kj15)。

摘　　要：采用集中质量法,建立了水下锚系观测系统的运动方程,编制MATLAB程序在时域内计算分析了锚系在布放过程中的姿态变化、动态张力变化及速度变化,并对比分析了四种锚系型式和3种海底底质刚度对锚系最终入土深度的影响。研究表明:(1)锚系在布放过程中,第一阶段姿态变化幅度较大,触底时,锚系各节点的张力达到最大值,动态张力变化幅度较大,设计锚系需要选取足够强度的系留缆索;(2)海底地质刚度越大,入土越浅,但同时会引起硬性冲击,在设计锚系时,需要充分调研当地海域的情况,据此合理设计锚系;(3)在锚系浮力满足回收的前提下,合理增设小浮球组可以有效减小入土深度,还可以进一步提高锚系回收的可靠性,降低着底冲击力。The motion equation of the submerged buoy system bottoming seabed is established by using the lumped mass method.The MATLAB program is compiled to calculate and analyze the attitude change,dynamic tension change and speed change of the submerged buoy system in the bottoming process in time domain.The influence of four types of mooring system and three kinds of seabed stiffness on the final depth of submerged mooring system is analyzed.The results show that:(1)during the deployment of the submerged mooring system,the attitude changes greatly in the first stage.When reaching the bottom,the tension of each node reaches the maximum value,and the dynamic tension changes greatly;(2)The greater the seabed geological stiffness is,the shallower the soil will be,but at the same time it will cause hard impact.When designing the anchor system,it is necessary to fully investigate the situation of the local sea area,so as to reasonably design the anchor system;(3)On the premise that the buoyancy of the submerged buoy system can meet the requirements of recovery,the reasonable addition of small floating ball group can effectively reduce the embedded depth,and further improve the reliability of anchor system recovery.

关 键 词：锚系观测系统 集中质量法 动态布放 入土深度 

分 类 号：TH137[机械工程—机械制造及自动化] TH113