Journal of Southwest Petroleum University(Science & Technology Edition) ›› 2026, Vol. 48 ›› Issue (1): 116-126.DOI: 10.11885/j.issn.1674-5086.2025.11.08.01

• A Special Issue on Technology of Large Offshore Fracturing Vessels • Previous Articles     Next Articles

Numerical Simulation of Hydrodynamic Response of Offshore Fracturing Vessel in Waves

YUAN Wenkui1, XU Zhihai2, FAN Gaozhao3, GUO Xiaoqiang3,4, WANG Xin'gen1, MENG Lingtao1   

  1. 1. China Oilfield Services Limited, Binhai New Area, Tianjin 300459, China;
    2. Shanghai Merchant Ship Design and Research Institute, Xuhui, Shanghai 201203, China;
    3. School of Mechanical Engineering, Hebei University of Technology, Beichen, Tianjin 300401, China;
    4. State Key Laboratory of Ocean Engineering, Shanghai Jiaotong University, Minhang, Shanghai 200240, China
  • Received:2025-11-08 Published:2026-03-09

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Abstract: Based on the three-dimensional potential flow theory, the hydrodynamic performance of China$'$s first offshore fracturing ship is investigated, focusing on its motion response under different wave directions, wave spectral peak periods, and wave heights. The frequency-domain response of the moored fracturing ship is analyzed using AQWA, through which the motion response amplitude operators, added mass, and radiation damping are obtained. The numerical results are validated through comparison with seakeeping experimental data conducted by the research group to evaluate the validity and accuracy of the model. Subsequently, the time-domain mooring response of the fracturing ship under various wave parameters is analyzed based on the frequency-domain results. The study indicates that the wave period has little influence on the added mass in the sway direction, while the added mass in the surge direction decreases first, then increases, and subsequently decreases. In contrast, an opposite trend is observed for the added mass in the heave direction. The added mass in the pitch and yaw directions also decreases initially, followed by an increase and a subsequent decrease as the wave period increases, whereas variations in the roll direction is relatively small. Moreover, under different wave periods, the radiation damping in all degrees of freedom is found to first strengthen and then weaken. When wave direction angle from 0° to 180°, the significant amplitude of the roll motion first increases and then decreases, reaching its maximum value at 90°. In contrast, the significant pitch angle first decreases and then increases, with a maximum at 180°. With an increase in the wave spectral peak period, the significant amplitudes of roll and heave show an increasing trend, whereas the significant pitch response is observed to first rise and then decline. Additionally, increasing wave height leads to increases in the significant amplitudes of roll, pitch, and heave. The research findings provide a theoretical basis and reference for the analysis and practical application of motion response of large vessels under wave conditions.

Key words: potential flow theory, hydrodynamics, radiation damping, added mass, frequency-domain, time-domain

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