履齿结构对深海沉积物扰动分析

Deep-sea sediment disturbance analysis using a tracked teeth structure

为探究集矿车在行进过程中履带运动对深海沉积物的扰动机理,并建立适用于机械结构与沉积物作用的仿真模型,结合水槽实验和模拟分析,设定对照试验,研究机械结构运动对沉积物的扰动作用和羽状流扩散现象。实验与仿真结果表明:偏置一字形履齿低扰动性能较好,扰动最大速度在1.5 m/s以下;扰动源的下陷深度和转速对水槽中的浊度变化有显著影响,浊度计最大和最小测量值为4 381.3 mg/L和3 073.3 mg/L,相差29.9%,峰值时间相差超过50%。搭建欧拉多相流模型,设定参数和边界条件,仿真与试验结果接近,可用于后续开展小范围内的机械扰动研究。

To investigate the disturbance mechanism of the track movement on deep-sea sediment during the traveling process of an ore-collecting vehicle and to establish a simulation model applicable to the role of mechanical structure and sediment—combined with an experimental and simulation water flume analysis—a control test was set up to study the disturbance effect of mechanical structure movement on the thin and soft substrate and the phenomenon of plume flow diffusion.The experimental and simulation results show that the offset zigzag tracked teeth perform better in low disturbance,with <1.5 m/s as the maximum speed of disturbance;the subsidence depth and rotational speed of the disturbance source considerably affect the change in turbidity in the flume,with maximum and minimum measurements of the turbidimeter of 4 381.3 mg/L and 3 073.3 mg/L,respectively,having a difference of 29.9%,and a difference of >50% in the peak time.The Eulerian multiphase flow(EMP) model was constructed,and the parameters and boundary conditions were set.The simulation is near the experimental result and can be used to study mechanical perturbation in a small range.