Dynamic Traction of Deep-Sea Polymetallic Nodule Collector

The ocean is extremely rich in mineral resources. To cope with the shortage of land resources, countries are focusing on development deep-sea mining technology. Owing to its superior traction performance, polymetallic nodule collector (DPNC) has become preferred solution for mining. This paper proposes a dynamic calculation model address shortcomings classical static consideration variation rule grouser–soil interaction DPNC process. Lab tests were conducted formulate materials similar soil, and corresponding shear stress–displacement models established using discrete element method (DEM) Magic Formula describe “shear stress–displacement” relationship more accurately. Considering Kunlong 500, which Chinese DPNC, as an example, periodicity dynamics force analyzed compared numerical simulation results. was smaller than fluctuated significantly when considering grousers–soil interaction. magnitude fluctuation influenced by ratio grouser height spacing. In design, spacing should be optimized according properties subsoil improve performance stability DPNC.