A Hybrid Finite Element Method – Kirchhoff Approximation Method for Modeling Acoustic Scattering from an Underwater Vehicle Model with Alberich Coatings with Periodic Internal Cavities

• Autorzy: Yang Fan , Peng Zilong , Song Hao , Tang Yuhang , Miao Xuhong

Identyfikatory

DOI

10.24425/aoa.2024.148777

• Języki publikacji: EN

Abstrakty

EN

Anechoic tiles can significantly reduce the echo intensity of underwater vehicles, thereby increasing the difficulty of detecting such vehicles. However, the computational efficiency of conventional methods such as the finite element method (FEM) and the boundary element method (BEM) has its limitations. A fast hybrid method for modeling acoustic scattering from underwater vehicles with anechoic tiles with periodic internal cavities, is developed by combining the Kirchhoff approximation (KA) and FEM. The accuracy and rapidity of the KA method were validated by FEM. According to the actual situation, the reflection coefficients of rubber materials with two different structures under rigid backing are simulated by FEM. Using the KA method, the acoustic scattering characteristics of the underwater vehicle with anechoic tiles are obtained by inputting the reflection coefficients and the target’s geometric grid. Experiments on the monostatic target strength (TS) in the frequency range of 1 to 20 kHz and time domain echo characteristics of acoustic scattering on a benchmark scale model with anechoic tiles are conducted. The research results indicate that the TS values and echo characteristic curves of the KA solutions closely approximate the experimental results, which verifies the accuracy of the KA method in calculating the TS and echo characteristics of underwater vehicles with anechoic tiles.

Słowa kluczowe

EN

anechoic tile; Kirchhoff approximation; target strength; echo characteristic

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2024
• Tom: Vol. 49, nr 2
• Strony: 209--219
• Opis fizyczny: Bibliogr. 26 poz., fot., rys., tab., wykr.

Twórcy

autor

Yang Fan

• School of Energy and Power, Jiangsu University of Science and Technology Zhenjiang, China

autor

Peng Zilong

• School of Energy and Power, Jiangsu University of Science and Technology Zhenjiang, China
• PLA Unit 92578 Beijing, China

autor

Song Hao

• Systems Engineering Research Institute Beijing, China

autor

Tang Yuhang

• PLA Unit 92578 Beijing, China

autor

Miao Xuhong

• PLA Unit 92578 Beijing, China

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