Dynamic Assessment and Parametric Sensitivity Analysis of a Mineral Conveying Rigid Pipe System

HU Wentao; GAO Feinong; BIAN Xin; LI Wenbo; BA Haoliang; ZHANG Hao

doi:10.7643/issn.1672-9242.2026.10.005

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Equipment Environmental Engineering ›› 2026, Vol. 23 ›› Issue (10) : 46-52. DOI: 10.7643/issn.1672-9242.2026.10.005

Special Topic——Theoretical Analysis and Design Methods for Ships and Ocean Engineering Equipment

Dynamic Assessment and Parametric Sensitivity Analysis of a Mineral Conveying Rigid Pipe System

HU Wentao^1,2, GAO Feinong^1,2, BIAN Xin^1,2, LI Wenbo^1,2, BA Haoliang¹, ZHANG Hao^1,2

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Abstract

The work aims to analyze the dynamic characteristics of a mineral conveying rigid pipe in complex marine environments and the effects of various parameters. A dynamic simulation model of the mineral conveying rigid pipe was established based on OrcaFlex. The effective tension and equivalent stress of the rigid pipe under different load cases were calculated, and the effects of sensitivity parameters such as wave heading angle, suspension stiffness, and the conveying flexible hose on the calculation results were analyzed. Based on the calculations of the three load cases, the maximum effective tension and equivalent stress of the rigid pipe under the deployment condition were far greater than those under the other two conditions. The parametric sensitivity analysis showed that the maximum effective tension and equivalent stress both reached their peak values at a wave heading angle of 90°, the flexible hose affected the calculation results of the deployment condition, and the suspension stiffness significantly affected the maximum effective tension of the rigid pipe. The results indicate that the deployment condition is the key condition for the single-pipe optimization design of the rigid pipe. In the calculation and analysis, the effect of the suspension hose should be considered under the deployment condition. In addition, the mining vessel should deploy the pipe in head seas to avoid the 90° wave heading angle. The suspension stiffness at the top of the rigid pipe greatly affects its axial motion following the mining vessel in the marine environment. Therefore, it should be reasonably set after sufficient calculation.

Key words

deepsea mining / mineral conveying / rigid pipe / dynamics / sensitivity analysis / suspension system

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HU Wentao, GAO Feinong, BIAN Xin, LI Wenbo, BA Haoliang, ZHANG Hao. Dynamic Assessment and Parametric Sensitivity Analysis of a Mineral Conveying Rigid Pipe System[J]. Equipment Environmental Engineering. 2026, 23(10): 46-52 https://doi.org/10.7643/issn.1672-9242.2026.10.005

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