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<p>An Umbilical Handling System (UHS) for a subsea mining machine (harvester) is presented in the paper. UHS is a typical subsystem of a larger general subsea mining handling equipment used for exploration of ocean’s floor for excavation of minerals and other resources. The main function of the system is to provide safe power supply from ship’s generators to the mining machine working on the seabed. With regard to future planned explorations, the cable length may reach 5&#xa0;km and more, with the power capacity of multiple MW. In the view of vessel constantly moving on waves, the umbilical may be damaged by excessive tension or fatigue. For a long life and reduced unit cost, a special system is implemented, providing the tension spectrum within acceptable limits, despite the heavy harvester resting on seabed, vessel in motion and dynamic loads applied. A mathematical model presented in this work aims to predict design loads and loading spectrum for a system under design. Simulations performed for operational weather window show the variation of loads in umbilical, which is critical for its design (armored sections&#xa0;should be optimized). The results generated can be used for lifetime design and optimization by umbilical provider. The summary is presented at the end.</p>

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Dynamics of subsea mining machine umbilical’s with a passive compensation system

  • 期刊论文

  • 发表日期：

    2025年1月11日

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  • Agnieszka Marciniak,
  • Marek Szczotka

摘要

An Umbilical Handling System (UHS) for a subsea mining machine (harvester) is presented in the paper. UHS is a typical subsystem of a larger general subsea mining handling equipment used for exploration of ocean’s floor for excavation of minerals and other resources. The main function of the system is to provide safe power supply from ship’s generators to the mining machine working on the seabed. With regard to future planned explorations, the cable length may reach 5 km and more, with the power capacity of multiple MW. In the view of vessel constantly moving on waves, the umbilical may be damaged by excessive tension or fatigue. For a long life and reduced unit cost, a special system is implemented, providing the tension spectrum within acceptable limits, despite the heavy harvester resting on seabed, vessel in motion and dynamic loads applied. A mathematical model presented in this work aims to predict design loads and loading spectrum for a system under design. Simulations performed for operational weather window show the variation of loads in umbilical, which is critical for its design (armored sections should be optimized). The results generated can be used for lifetime design and optimization by umbilical provider. The summary is presented at the end.