海底作业装置下放过程中的推进移位能力分析

Analysis of the Displacement Capability of Thruster for Seafloor Operating Devices during Deployment

海底矿区多数地形复杂,海底作业装置下放着底前往往需要进行小范围的移位以寻找合适的着陆点。以海底多金属硫化物规模取样装置为例,采用数值计算的方法研究了海底作业装置下放过程中的推进移位能力,分析了影响移位能力的关键因素。结果表明:推进移位方式是实现着底前小范围寻址的有效手段;迎流面积影响移位的响应时间,但对最终可移位距离没有影响;水深度越大、推进器推力越大,可移位距离也越大;受海流影响,顺流移位能力要大于逆流移位能力。

Because of the complex topography of most deep sea mining areas, Seafloor operating devices often need a small range displacement to get a suitable landing point during deployment to the seafloor. Taking a scaled sampling device of Seafloor polymetallic sulfide as an example, the displacement capability of thruster during deployment was studied by the numerical calculation method, and the key factors influencing the displacement were analyzed. The results showed that the thrust displacement method was an effective way to realize a small range of searching address before landing. The projective areas affected the response time, but had no effect on the displacement range in the end. Consequently, the deeper sea water was the more powerful the thruster was and the larger the displacement was, as well as the displacement capability of downstream was greater than that of upstream under the influence of ocean currents.