Multimodal superposition modeling and acoustic field characteristics analysis of scattering sound field from spherical targets
Source abstract
Abstract
In this paper, a multimodal superposition model of the scattered acoustic field from a spherical target is investigated and the distribution laws of the scattered acoustic field of different sizes of rigid and elastic spheres at different frequencies are analyzed. The scattering cross section is approximated as the geometric projected area under the high-frequency/large-radius condition, whereas the scattering cross section is proportional to the fourth power of the frequency under the low-frequency/small-radius condition (ka ≪ 1). The scattering characteristics of the elastic sphere are affected by both geometric and elastic scattering, and the presence of Rayleigh and whispering-gallery waves significantly affects the acoustic field in the vicinity of the elastic sphere. Numerical simulation results show that the scattered acoustic field of the rigid sphere exhibits obvious directivity and geometric shadowing effects at high frequencies, while the distribution of the acoustic field of the elastic sphere exhibits complex interference phenomena and energy attenuation due to the elastic resonance waves. This study provides a theoretical basis and quantitative evaluation method for underwater target acoustic detection and identification.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Underwater Acoustics Research · Underwater Vehicles and Communication Systems · Geophysical Methods and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Underwater Acoustic Engineering, Harbin Engineering University 1 , Harbin 150001,
National Key Laboratory of Underwater Acoustic Technology, Harbin Engineering University 2 , Harbin 150001,
Key Laboratory of Marine Information Acquisition and Security (Harbin Engineering University), Ministry of Industry and Information Technology 3 , Harbin 150001,
Sanya Nanhai Innovation and Development Base of Harbin Engineering University 4 , Sanya 572000,
Funding
National Natural Science Foundation of China · The Stable Supporting Fund of Acoustic Science and Technology Laboratory
References (34)
Show source-provided references
1. Passive acoustic bearing estimation of underwater gas leak using single vector hydrophone10.1016/j.apacoust.2025.110623 ↗
2. Simulation and experimental studies on acoustic scattering characteristics of surface targets10.1016/j.apacoust.2018.02.014 ↗
3. A coupled hybrid smoothed radial point interpolation method for computing underwater acoustic scattering10.1063/5.0167514 ↗
4. Rigid spherical acoustic scattering simulation based on LMS VirtualLab10.3969/j.issn.1673-3819.2022.05.018 ↗
5. Solution of viscoelastic scattering problems in linear acoustics using hp boundary/finite element method
6. Solution of large-scale underwater acoustic problems using fast boundary element method
7. Analysis of acoustic scattering characteristics of underwater targets based on Kirchhoff approximation and curved triangular mesh10.12382/bgxb.2022.0374 ↗
8. Backscattering from spherical elastic inclusions and accuracy of the Kirchhoff approximation for curved interfaces10.1111/j.1365-246x.2006.03047.x ↗
9. A fast method for calculating bistatic acoustic target strength of an underwater target
10. Modal analysis of acoustic energy periodic fluctuations due to internal tides in the yellow sea10.1109/joe.2021.3095089 ↗
11. Acoustic scattering characteristics of underwater elastic corner reflectors
12. Automatic detection of underwater small targets using forward-looking sonar images10.1109/tgrs.2022.3181417 ↗
13. Deep learning-based target recognition framework for multistatic sonar using frequency-domain scattering features
14. Impact of surface wave scattering on synthetic aperture sonar imaging resolution in elastic boundary environments
15. Research on iterative angular spectrum algorithm for flexible hyperelastic holographic sonar system
16. On near- and far-field acoustic radiation characteristics of ships in finite-depth water environment10.1016/j.apacoust.2020.107644 ↗
17. Scattering of acoustic waves by a sector10.1016/j.wavemoti.2013.02.001 ↗
18. A study on the acoustic propagation characteristics of circular expanding ducts using the finite element method10.1063/5.0249301 ↗
19. An efficient acoustic scattering model based on target surface statistical descriptors for synthetic aperture sonar systems10.1007/s11804-020-00163-1 ↗
20. An elastic wave enhancement method based on modified bright point model
21. Research on the key technology based on multi-beam synthetic aperture sonar
22. 1983 · 12
23. MATLAB-based calculation for element stiffness matrix of spatial beam
24. Symbolic numerical computational tools for nonlinear and adaptive control
25. ParFor and co-distributor parallel approaches for implementing fractal image compression based genetic algorithm
26. 2017
27. Waves generated by a vibrating rigid sphere with an elastic shell submerged in a fluid10.1121/10.0019417 ↗
28. Acoustic scattering echo modeling and signal separation of underwater quiet small targets
29. Influences of sound scattering by elastic cylindrical shell on the directivity of vector sensor
30. Underwater multi-target position method based on received signal strength
31. A spherical source distribution method for calculating acoustic radiation of elastic underwater structures10.1016/j.enganabound.2024.105945 ↗
32. Acoustic scattering by solid cylinders and spheres: Theory and applications10.1121/10.0036795 ↗
33. The overlapping finite element method for the underwater acoustic scattering problems
34. Calculation of 3-D acoustic scattering characteristics of a target in near-field at high-frequency