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Overlapping finite element method for analysis of underwater acoustic scatterings by elastic targets
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Qiang GUI1, Yu-zheng YANG1, Shao-jian CHENG2, Xiang-yu YOU3, Ying-bin CHAI1, Wei LI1, 4, 5
Journal of Ship Mechanics | 2025, 29(9) : 1475 - 1483
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Journal of Ship Mechanics | 2025, 29(9): 1475-1483
• Hydro/Structural Acoustics •
Overlapping finite element method for analysis of underwater acoustic scatterings by elastic targets
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Qiang GUI1, Yu-zheng YANG1, Shao-jian CHENG2, Xiang-yu YOU3, Ying-bin CHAI1, Wei LI1, 4, 5
Affiliations
  • 1.School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
  • 2.Shanghai Waigaoqiao Shipbuilding Co., Ltd., Shanghai 200137, China
  • 3.School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410114, China
  • 4.Hubei Key Laboratory of Naval Architecture and Ocean Engineering Hydrodynamics, Huazhong University of Science and Technology, Wuhan 430074, China
  • 5.Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration (CISSE), Shanghai 200240, China
Published: 2025-09-20 doi: 10.3969/j.issn.1007-7294.2025.09.013
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The traditional low-order finite element model is usually used to obtain the acoustic scattering field of a submarine structure, and then to evaluate the acoustic stealth performance. However, the traditional finite element method is affected by the numerical pollution effect, and requires very dense mesh to obtain reliable numerical solutions for problems with relatively medium and high frequencies, leading to prohibitive cost in mesh division. In this paper, the overlapping finite element method (OFEM) and Dirichlet-to-Neumann (DtN) mapping technique are combined to construct a coupled numerical model for the acoustic scattering of underwater elastic targets. When constructing local approximations in the OFEM, the virtual nodes are used to generate partition of unity functions, while no degrees of freedom are assigned to these virtual nodes. The novel OFEM can be directly applied to low-order finite element models and achieve higher-order approximations of the unknown variables. Numerical examples show that the OFEM can reduce the numerical error significantly and has broad application prospects in the prediction of underwater acoustic scattering by elastic targets.

overlapping finite element method  /  acoustic scattering by elastic target  /  target strength  /  Dirichlet-to-Neumann mapping technique
Qiang GUI, Yu-zheng YANG, Shao-jian CHENG, Xiang-yu YOU, Ying-bin CHAI, Wei LI. Overlapping finite element method for analysis of underwater acoustic scatterings by elastic targets[J]. Journal of Ship Mechanics, 2025 , 29 (9) : 1475 -1483 . DOI: 10.3969/j.issn.1007-7294.2025.09.013
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Year 2025 volume 29 Issue 9
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Article Info
doi: 10.3969/j.issn.1007-7294.2025.09.013
  • Receive Date：2025-03-18
  • Online Date：2026-03-26
  • Published：2025-09-20
Article Data
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History
  • Received：2025-03-18
Funding
Affiliations
    1.School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
    2.Shanghai Waigaoqiao Shipbuilding Co., Ltd., Shanghai 200137, China
    3.School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410114, China
    4.Hubei Key Laboratory of Naval Architecture and Ocean Engineering Hydrodynamics, Huazhong University of Science and Technology, Wuhan 430074, China
    5.Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration (CISSE), Shanghai 200240, China
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