Vibration Characteristics and Reduction Analysis of Lifting Pipe under Ocean Current

Author:

Song Qinghui1ORCID,Jiang Haiyan2ORCID,Song Qingjun2ORCID,Xiao Linjing1ORCID,Zhong PeiSi1ORCID

Affiliation:

1. Department of Mechanical and Electronic Engineering, Shandong University of Science & Technology, Qingdao 264005, China

2. Tai-an School, Shandong University of Science & Technology, Tai-an 271009, China

Abstract

Effects of vibration absorbers on the lifting pipe in deep-sea mining have been attracting more and more attention in the recent three decades; however, there are very few reports about the influence of ocean current on the pipe vibration in the literature. Considering the geometrical features of the prototype, this paper establishes the physical model, mathematical model, and simulation model of the lifting subsystem. A comprehensive finite element model for the deep-sea mining system by the OrcaFlex is developed to explore the influences of buffer mass and sailing velocity on the deflection angle and the axial load and stress of the lifting pipe. Analytical and numerical simulations have been formulated to illustrate variation rule of longitudinal vibration and axial stress at the position of pump and buffer for the lifting subsystem to determine the dynamic vibration absorber parameters. In this paper, MATLAB and Orcaflex software are used to verify the mathematical model. The simulation results show that the attaching DVAs can effectively reduce the axial stress, and longitudinal displacement at certain positions of the lifting pipe.

Funder

National Natural Science Foundation of China

Publisher

Hindawi Limited

Subject

Mechanical Engineering,Mechanics of Materials,Geotechnical Engineering and Engineering Geology,Condensed Matter Physics,Civil and Structural Engineering

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