Acoustic scattering from a cylindrical shell with an internal rigid plate: Analysis and experiment
Yunzhe Tong1, Jun Fan1, Bin Wang1
1Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China.
The Journal of the Acoustical Society of America
|July 2, 2018
Summary
This study investigates sound scattering from fluid-loaded stiffened cylindrical shells. An internal plate significantly alters wave radiation, impacting acoustic signatures.
Area of Science:
- Acoustics
- Fluid Dynamics
- Materials Science
Background:
- Sound scattering from structures is crucial for sonar and material characterization.
- Cylindrical shells are common structural components in various engineering applications.
- Internal stiffening can modify the acoustic response of shells.
Purpose of the Study:
- To investigate sound scattering from a fluid-loaded stiffened cylindrical shell.
- To analyze the effect of an internal longitudinal rigid plate on acoustic scattering.
- To understand wave generation, propagation, and radiation mechanisms.
Main Methods:
- Theoretical modeling of acoustic wave interaction with the shell.
- Experimental measurements of backscattered sound.
- Analysis of frequency-angle spectra to identify dominant features.
Main Results:
- Dominant spectral features are attributed to shell resonance and wave interactions.
- The internal plate induces radiation of subsonic a0 waves.
- Interference fringes in spectra are linked to specular reflection and structural scattering.
Conclusions:
- The internal plate significantly influences the acoustic scattering pattern.
- Resonance and wave interaction are key to understanding scattering phenomena.
- Predictive formulas for interference patterns are provided.
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