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<p>Vertical transport of mineral resources from the deep seabed poses significant challenges due to the complex dynamic interactions between coarse granular particles and lifting equipment. This study investigates the lifting force characteristics of a recently proposed mechanical-hydraulic hybrid vertical lifting system through experimental and numerical approaches. Laboratory experiments revealed severe force fluctuations during the lifting of deep-sea minerals. This phenomenon was further analyzed using coupled simulations based on Multibody Dynamics and the Discrete Element Method. Unlike conventional rigid body models, the proposed coupled simulations explicitly resolve the interactions among rigid structures, flexible elements, and densely confined granular particles by proposing a rigid-flexible-granular framework. The results showed a direct link between lifting force fluctuations and the cyclic evolution of internal force chain networks. Furthermore, a full-factorial analysis of variance quantified that the lifting weight and the particle size showed a dominant influence over the lifting speed on the force fluctuation amplitude. These findings provide insights into the dynamic behavior of the system, and give a strong basis for the engineering design of the driving system of the mechanical-hydraulic hybrid vertical lifting system.</p>

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Characterizing the lifting forces in the mechanical-hydraulic hybrid vertical lifting system based on MBD-DEM coupled simulations

  • 期刊论文

  • 发表日期：

    2026年7月2日

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  • Miao Li,
  • Xiangwei Liu,
  • Nenad Zrnic,
  • Yuqing Feng,
  • Peiliang Tao,
  • Shuhao Yang

摘要

Vertical transport of mineral resources from the deep seabed poses significant challenges due to the complex dynamic interactions between coarse granular particles and lifting equipment. This study investigates the lifting force characteristics of a recently proposed mechanical-hydraulic hybrid vertical lifting system through experimental and numerical approaches. Laboratory experiments revealed severe force fluctuations during the lifting of deep-sea minerals. This phenomenon was further analyzed using coupled simulations based on Multibody Dynamics and the Discrete Element Method. Unlike conventional rigid body models, the proposed coupled simulations explicitly resolve the interactions among rigid structures, flexible elements, and densely confined granular particles by proposing a rigid-flexible-granular framework. The results showed a direct link between lifting force fluctuations and the cyclic evolution of internal force chain networks. Furthermore, a full-factorial analysis of variance quantified that the lifting weight and the particle size showed a dominant influence over the lifting speed on the force fluctuation amplitude. These findings provide insights into the dynamic behavior of the system, and give a strong basis for the engineering design of the driving system of the mechanical-hydraulic hybrid vertical lifting system.