Grant: Collaborative Research and Development Grants
École de technologie supérieure
$120,000.00
Development of engineering methods for structure-borne noise specification and quantification in aircraft and rotorcraft cabins
EF 2018-19
Résumé
Aircraft and rotorcraft manufacturers integrate a high number of systems which are responsible for tonal vibrations such as (i) aircraft engines generating low frequency tonal components at Fan and Engines core rotor frequency, (ii) rotorcraft main rotor transmission generating structure-borne mid frequency tones at gear mesh frequencies, (iii) hydraulic system generating mid to high frequency tonal components and (iv) electric components generating high frequency harmonics. These vibrations propagate into the aircraft/rotorcraft structure and are transmitted to the interior trim panels that, in turn, radiate noise into the cabin. This noise, referred to as SBN, is known to be a major source of aircraft/rotorcraft interior noise that affects passengers comfort, increases crew member noise exposure level and decreases their communication ability. However, these annoying SBN could be mitigated if vibrating systems, receiving structures and interfaces between them were well specified and designed during the product development phase. The overall objective of this project is to develop and validate engineering methods for predicting SBN generated in aircraft/rotorcraft cabins by integrated vibrating systems. These methods will be based on existing SBN methods (i.e., Frequency Based Substructuring and Component-based TPA) which are not widely spread in the mechanical engineering community because they are difficult to apply in practice. The objective of this project is in consequence to investigate, extend and validate these methods specifically for aerospace integrated systems and structures focusing on the degree of complexity required for the targeted accuracy on the SBN prediction. The three industrial partners will be provided with an engineering tool together with the relevant methodologies and metrics dedicated to their SBN challenges. This knowledge toolbox will allow them a better engineering integration of SBN design challenges all along the product design cycle.*
Programme
Collaborative Research and Development Grants
Bénéficiaire
Emplacement
Quebec, Canada
Type de bénéficiaire
Academia
Type
Grant
Source
NSERC's Awards Data
Tel que publié
Application id
514874-2017
Name nom
Doutres, Olivier
Department département
Génie mécanique
Organization id
53
Institution établissement
École de technologie supérieure
Province en
Québec
Province fr
Québec
Country en
CANADA
Country fr
CANADA
Fiscal year exercice financier
2018
Competition year année de concours
2017
Award amount
120000
Program id
CRDPJ
Program name en
Collaborative Research and Development Grants
Program name fr
Subventions de recherche et développement coopérative
Group en
Research partnerships programs
Group fr
Programmes de partenariat
Committee code
96
Committee name en
RPP Internal Decision Cttee
Committee name fr
Cté de décision interne - PPR
Area of application code
703
Area of application group en
Transportation systems and services
Area of application group fr
Services et systèmes de transport
Area of application en
Aerospace
Area of application fr
Aérospatial
Research subject code
2108
Research subject group en
Mechanical engineering
Research subject group fr
Génie mécanique
Research subject en
Aerospace, aeronautical and automotive engineering
Research subject fr
Génie aérospatial, aéronautique et automobile
Partie
2
Nb partie
2
Application title
Development of engineering methods for structure-borne noise specification and quantification in aircraft and rotorcraft cabins
Keyword
NSERC
Application summary
Aircraft and rotorcraft manufacturers integrate a high number of systems which are responsible for tonal vibrations such as (i) aircraft engines generating low frequency tonal components at Fan and Engines core rotor frequency, (ii) rotorcraft main rotor transmission generating structure-borne mid frequency tones at gear mesh frequencies, (iii) hydraulic system generating mid to high frequency tonal components and (iv) electric components generating high frequency harmonics. These vibrations propagate into the aircraft/rotorcraft structure and are transmitted to the interior trim panels that, in turn, radiate noise into the cabin. This noise, referred to as SBN, is known to be a major source of aircraft/rotorcraft interior noise that affects passengers comfort, increases crew member noise exposure level and decreases their communication ability. However, these annoying SBN could be mitigated if vibrating systems, receiving structures and interfaces between them were well specified and designed during the product development phase. The overall objective of this project is to develop and validate engineering methods for predicting SBN generated in aircraft/rotorcraft cabins by integrated vibrating systems. These methods will be based on existing SBN methods (i.e., Frequency Based Substructuring and Component-based TPA) which are not widely spread in the mechanical engineering community because they are difficult to apply in practice. The objective of this project is in consequence to investigate, extend and validate these methods specifically for aerospace integrated systems and structures focusing on the degree of complexity required for the targeted accuracy on the SBN prediction. The three industrial partners will be provided with an engineering tool together with the relevant methodologies and metrics dedicated to their SBN challenges. This knowledge toolbox will allow them a better engineering integration of SBN design challenges all along the product design cycle.*
