Smart Lining - acoustic requirements on future lightweight structures

Transcription

1 Smart Lining - acoustic requirements on future lightweight structures Dr. Dietmar Völkle Head of Innovation

2 Diehl Aircabin - One of Four Operational Units Sales: over 700 m Employees: over 3,500 Headquarters: Laupheim, Germany Sales: 230 m Sales: 330 m Sales: 140 m Sales: 30 m Employees: 1,200 Employees: 1,400 Employees: 490 Employees: 200 Shareholders: 51% Diehl, 49% Thales Shareholders: 51% Diehl, 49% Thales joint venture with joint venture with Trend

3 Diehl Aerosystems - Building Blocks Aircraft Systems Cabin Interiors Cockpit Systems Flight & Engine Control Systems Avionic Platforms Air Distribution Systems Crew Rest Compartments Comfort Modules Utility Systems Safety & Supply Systems Interior Lighting Systems Floor-to-Floor/ Lining Service Modules VIP Furniture From cockpit to cabin. Fully integrated or individual packages. 3

4 Product Overview Air Distribution Systems Air Ducting and Air Outlets Drain Pipes in Composite Technology Highly integrated and complex Air Ventilation Systems Diehl Aircabin is the reference for advanced ducting: Less weight. Fewer parts. Less maintenance. Better accoustic. 4

5 Product Overview Compartments & Monuments Cabin Crew Rest Compartment (BCRC / LDCRC / UDCRC / OHCRC) and Flight Crew Rest Compartments Integrated Systems (O2, Electrics, IFE, Air Ducts, Fire Ext. System) Highly customized Monuments e.g. relax areas, smoking areas, kindergarden, wine carry areas. Delivered in an approved quality and maturity, the compartments and monuments are optimized for quick and efficient installation. Completely tested, plug & play solutions. 5

6 Product Overview Lining & Floor-to-Floor Capabilities Dado Panels Sidewalls Light Covers Bins Ceilings Door & Doorframe Lining Entrance Area Delivered as preassembled modules with electric, lighting, O2 and safety equipment integrated. 6

7 Product Overview Individual Cabins / Mock-Ups VIP & Corporate Jet Linings * Designed by Mahler Industrial Design Special Furniture / Real Wood Veneer Mock-Ups High-end surfaces based on extremely light weight composite materials. Integrated light solutions. 7

8 Acoustic Comfort 8

9 Noise Sources affecting Interior Noise Noise sources outside cabin Engines Fluid mechanic noise laminar Boundary layer noise Antenna noise Landing gear, slats & flaps (departure + approach) turbulent Noise sources inside cabin Air conditioning system Hydraulic system Avionic ventilation Vacuum toilets Air extraction system Electrics Passengers

10 Cabin wall construction

11 Noise transmission paths Fuselage structure Fixing element Glass wool insulation Lining element Air borne noise Leakage Noise Structure borne noise Source: Prof. Wolfgang Gleine

12 Example for Cabin Noise Distribution A330 Cruise Conditions L A [db] 5 db Cabin length [%] Source: Airbus Operations

13 General Requirements on Interior Noise Creation of a comfortable acoustic environment inside Cabin and Cockpit Silent but acoustic privacy Cabin As silent as possible Crew Rest Compartments Well balanced noise in cabin Whole Cabin, Cockpit No tonal components Whole Cabin, Cockpit Good speech intelligibility Whole Cabin, Cockpit Compliance to noise regulations e.g. Galley area

14 Solutions for improved cabin acoustics Mass enhancement: Additional silicone heavy layer is added in order to increase the transmission loss Extensive weight and cost impact

15 Solutions for improved cabin acoustics Noise masking Annoying noise from flight deck and galley within crew rest compartment Overlay of ambient noise in low frequency range 5 kg weight investment into intelligent noise masking system lead to savings of weight for standard insulation material Easy adaption of masking sound via software update

16 Conclusion All presented solutions show negative effects Weight Surface quality New approach for enhanced cabin acoustics needed Cooperation with the German Aerospace Centre (DLR): Smart active Lining Module (SALIM)

17 Acoustic comfort with smart active lining modules Active control of noise emitting structural vibrations of the sidewall panel (ASAC) Best performance in the low-frequency range (< 500 Hz) Reduction of narrow- and broadband noises Effective for all noise sources entering from the exterior of the sidewall panels Suitable for retrofitting

18 Vielen Dank für Ihre Aufmerksamkeit 18