Systemic solutions
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Automobile Industry
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Low Noise Solution For Intake And Exhaust Systems
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Interior Product Performance Optimization And Cost Reduction Solutions
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Low Noise Solution For Hydrogen Fuel Cell System
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Low Noise Solution For Vehicle Electric Drive System
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Low Noise Solution For Vehicle Air Conditioning System
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Vehicle Damping Layout Optimization And Lightweight Solutions
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Aviation Industry
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Material Industry
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Other Industry
Systematic solution for aviation siding sound insulation
1. Introduction to the background of noise in aircraft cabins
1.1 Main sources of noise in aircraft cabins and suppression solutions
The main noises of concern are divided into several categories: engine airborne sound, turbulent boundary layer (TBL) noise, engine structural sound and air conditioning noise:
· Sound sources outside the cabin: engine airborne sound, TBL and other aerodynamic noise sources:
· The noise reduction effect on the sound source side can be obtained through the sound load test on the surface of the aircraft wall panel structure.
· Sound source in the cabin: noise from the air-conditioning system;
· Suppress cabin noise by reducing noise from the air-conditioning system.
· Wall panel sound insulation:
· By improving the sound insulation capability of aircraft wall panels, the impact of sound sources outside the cabin on cabin noise can be suppressed;
· The balance between lightweight and high sound insulation is the main breakthrough point in wall panel design.
Extravehicular noise source
In-cabin noise source: air conditioning system
Aircraft wall panel sound insulation: lightweight, high sound insulation
1.2 Development trend of wall panel sound insulation:
· Aircraft structure design direction:
· Towards composite fuselage structures in the future—>reduced surface density—>decreased sound insulation of wall panels;
· How to effectively improve the sound insulation of wall panels:
· Traditional method: refined design (using numerical analysis methods, Refined design of the wall panel structure), balancing the layout of the double-layer structure and thermal insulation and sound insulation cotton;
· New methods: Use new materials and new processes to break through the limitations of conventional quality laws to obtain better noise reduction solutions;
2. BOACH acoustic wall panel sound insulation systematic solution:
· Low-noise wall panel structural design solution based on material-to-system materials—>Estimation of sound insulation properties of structural wall panels—>Proposal of high-insulation volume wall panels—>Configuration detailed design—>Wall panel test verification—>SOP
· Lightweight metamaterial sound insulation solution: Provides better full-band sound insulation properties (an effective solution verified by experiments)
2.1 Materials—>Components—>System-level engineering and technical services
· Material level:
· Conduct mechanical and acoustic performance tests based on wall panel configuration materials to obtain relevant parameters of basic materials;
· Provide customers with customized test bench products and technical services for building material databases;
· Select and provide corresponding noise reduction materials and products for customers.
Aviation damping sticker
Structural material testing
equipment
Sound absorbing material testing
2.1 Materials—>Components—>System-level engineering and technical services
· Component level:
· Based on the actual layout of the wall panel structure, optimize the layout of damping, thermal insulation and sound insulation cotton, shock absorbers, interior panels, etc. ·
Improve the sound insulation of the wall panel through refined design, and make the wall panel to improve its performance verify;
| Material | Type | Density | modulus | shear modulus | thickness |
| NOMEX | HRH-78-1/4-3.0 | 48kg/m^3 | 1.3E8 | 3E7 | 18.6mm |
Optimization of the configuration and location of thermal insulation and sound insulation cotton - improved sound insulation performance of wall panels
Optimization of the configuration and location of thermal insulation and sound insulation cotton - improved sound insulation performance of wall panels
2.1 Materials—>Components—>System-level engineering and technical services
· System level:
· Carry out cabin-level design, performance evaluation and test verification;
· On-board verification: Optimize the configuration layout on the cabin section, and verify its noise reduction effect through flight testing.
System-level cabin design and performance evaluation
On-machine noise reduction performance verification
2.3 Lightweight metamaterial sound insulation solution
· Provide customers with customized acoustic metamaterial design, processing and performance verification services;
· Cooperate with customers to carry out relevant environmental test verification and installation verification work.
AMM multi-cell configuration—1mX1m large wall panel
AMM multicellular configuration template
AMM multi-cell configuration—random sound field incidence
Contact us
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Address：
Room 901, Building 1, Phase 2, Yungu Phase 2, Fengxi New Town, Xixian New District, Xixian New District, Xi'an City, Shaanxi Province
Room 307, Building 1, Harbin Institute of Technology Robot Industrial Park, No. 488 Qianjin East Road, Economic Development Zone, Kunshan City, Jiangsu Province
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