Shipbuilding Noise Engineering: AeroAcoustics and VibroAcoustics Simulation

FEA & CFD Based Simulation Design Analysis Virtual prototyping MultiObjective Optimization

Internal noise on board marine vessels stem from any number of different sources, including engines, generators, bow thrusters, HVAC and propellers. The resulting Noise prediction models must accurately predict on board noise in cabins for different operating conditions. From large cruise ships to yachts, from frigates to submarines, many design challenges shall be addressed in the design phases of marine applications. If on the one hand the exterior noise, due to propellers, hull radiation or muffler, has to be limited for discretion or environmental reasons; on the other hand, interior noise is of concern for crew and passengers’ comfort.

Ships and yachts acoustics design and optimization

AeroAcoustics

AeroAcoustics simulation try to use advanced capabilities with couple using of CFD simulation and advanced Acoustic solvers to predict accurately and efficiently the noise generated by turbulent flows. Results from an unsteady flow simulation performed with CFD codes such as MSC Cradle,  Ansys Fluent, StarCCM+, AVL FIRE M, OpenFOAM and others are used by AeroAcoustics solver to compute aerodynamic noise sources.

With using AeroAcoustics simulation, our engineers can study the noise generated by any turbulent flow and the interactions between the aeroacoustic noise sources and a vibrating structure, absorbant materials or acoustic traps such as resonators.

Applications:
  • Air conditioning modules (HVAC).
  • Side mirror noise.
  • Airframe noise (landing gear, trailing edge).
  • Air distribution systems.
  • Fan Noise

 

VibroAcoustics

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.

Enteknograte engineers offers predictive dedicated models addressing both the exterior noise radiation and the interior noise design. Among advanced and multidisciplinary combination of FEA or CFD tools and Acoustic solvers, unique methodology developed to serve the shipbuilding industry.

Marine ship CFD Msc Cradle Ansys Fluent Siemens Star-ccm+
Underwater Noise Prediction Ship hull pressure fluctuation and prediction of underwater noise
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