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| Simulation of Acoustic-vibration Coupling Response of Embedded Weapon Bays with Missiles |
| Received:February 20, 2025 Revised:March 24, 2025 |
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| DOI：10.7643/issn.1672-9242.2025.05.010 |
| KeyWord:embedded weapon bay aero-acoustic characteristics acoustic-vibration coupling periodic vortex collision noise reduction design vibration response |
| Author | Institution |
| LIU Bo |
Shanghai Spaceflight Precision Machinery Institute, Shanghai , China |
| ZHAI Shihui |
Shanghai Spaceflight Precision Machinery Institute, Shanghai , China |
| SHENG Peng |
Shanghai Spaceflight Precision Machinery Institute, Shanghai , China |
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| Abstract: |
| The work aims to predict the aero-acoustic characteristics of embedded weapon bays with missiles, clarify the noise source distribution and vibration response mechanisms, and provide theoretical guidance for safe aircraft launch and noise reduction design. Based on the acoustic-vibration coupling theory, a hybrid approach combining Finite Element Analysis (FEA) and Statistical Energy Analysis (SEA) was developed. The Möhring acoustic analogy method was employed to identify noise sources. ACTRAN was used to simulate sound pressure level distributions under varying Mach numbers (0.5-1.95 Ma), while VA One was combined to analyze vibration response characteristics. The validity of the model was verified with U.S. Air Force experimental data.The total sound pressure level in the weapon bay initially increased and then decreased with the rising Mach numbers, with the peak pressure concentrated at the leading edge, trailing edge, and tail regions. The tail subsystem exhibited significant vibration responses due to periodic vortex collisions. Simulation results showed less than 6 dB deviation from experimental data, confirming the reliability of the hybrid method. The aero-acoustic noise in embedded weapon bays is strongly governed by vortex dynamics, where periodic tail vortex collisions dominate vibration excitation. The acoustic-vibration coupling hybrid simulation method enables precise characterization of acoustic characteristics in bays, offering critical insights for optimizing weapon bay configurations and noise reduction design. |
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