Aerospace Engineering: AeroAcoustics and VibroAcoustics Simulation
FEA & CFD Based Simulation Design Analysis Virtual prototyping MultiObjective Optimization
Aero-acoustics is important because of the growing concern in the noise levels generated by engineering applications such as propellers, rotors, aircraft engines, nozzle, etc. From the largest commercial jets to small general aviation aircrafts, from military carriers to business jets, for fixed-wing aircrafts or helicopters, we offer the best available tools and unmatched consulting experience.
Acoustic simulation helps aircraft manufacturing companies to analyze and detect the sources that create noise. It can be used to study the noise flow and the paths that it uses to reach the receiver. Enteknograte engineers offers the best available tools and unmatched consulting experience in:
- Fuselage and cockpit insulation assessment and optimization
- Engine nacelle liner design
- Environmental Control System noise propagation in air distribution duct
- Ramp noise
- Broad-band aero-acoustics
- Acoustic fatigue
Enteknograte offers a Virtual Engineering approach with CFD and FEA tools such as MSC Cradle, Ansys Fluent, StarCCM+ for flows simulation and FEA based Codes such as ABAQUS, Ansys, Nastran and LS-Dyna, encompassing the accurate prediction of in-service loads, the performance evaluation, and the integrity assessment including the influence of manufacturing the components. Dependent of problem, we use ESI VA-one and MSC Actran as acoustics solver
In order to study the interaction of structural vibration with the fluid, it is necessary to model the acoustic behavior of the involved structural components including the conventional material for acoustic or visco-elastic media, porous or incompressible media, composite materials or active components like piezo-electric ceramics.
- Automotive: Noise related problems from powertrains, intakes, exhausts, passenger compartment, trim, seats, hoses, tires, windows and windshields, audio, HVAC.
- Aerospace: Sound transmission through cockpit and fuselage, noise propagation in air distribution system, random dynamic response at take-off.
- Consumer goods: Telephones, headsets, loudspeakers, hearing aid devices, disk drives, washing machines, refrigerators, cameras
Boundary Element Acoustics
Often used for exterior acoustics problems, the boundary element method (BEM) is ideal for problems involving very complex geometry that may be a challenge to model for the FEM method. The BEM method helps simplify exterior acoustics simulation since only the outer surface mesh of the geometry is needed. This simplifies both the modeling process and reduces the degrees of freedom in the simulation model which will result in easier analysis.
Finite Element Acoustics
The finite element method (FEM) for acoustics analysis is ideal for simulating interior acoustics problems. In addition to FEM being the more efficient method in terms of solution speed, FEM acoustics lets you perform coupled vibro-acoustics analyses that take structural modes and soundproofing materials into consideration. FEM acoustics can be used to solve exterior acoustics problems as well, which is often used for noise analysis of air induction systems in powertrain.