DEA - Dynamical Energy Analysis
Ship with engine excitation. Plate radiation levels (color scheme) and cavity noise levels (blue).
A new product to solve your vibro-acoustic problems across the whole frequency range!
Predicting wave energy distributions for short-wavelength vibrations, elastic deformations or acoustic radiation in complex built-up structures is a challenging task. An efficient, reliable and universal algorithm is now available based on a new technique called Dynamical Energy Analysis (DEA) covering the mid-to-high frequency range.
Advantages of DEA
- can be based on existing FEM meshes. No new modelling effort.
- closes the midfrequency gap, where FEM is too expensive and the underlying assumptions of SEA do not apply.
- more efficient than ray tracing.
- offers information about spatial resolution within each subsystem in contrast to SEA's average per subsystem.
- the mesh size can be chosen independently of the frequency and coarser than in FEM. It only needs to resolve the geometry.
- computational time is independent of the frequency. In contrast to FEM, high frequencies are even a bit faster due to stronger damping.
Shock tower of a car. Comparison between FEM frequency averaged and DEA result.
- sound and vibration propagation in mechanical structures (Ships, Trains, Airplanes, Trucks, Cars, Buildings, ...).
- general complex built-up structures in mechanical engineering.
- acoustics in buildings.
- electromagnetic waves (microwave, optics, RF fields, WiFi, etc.).
Getting the Simulation Tool
For more information and to order the product, please contact us at firstname.lastname@example.org.
Origin of the method
The core of the DEA method originates from research results of Gregor Tanner, associate professor at the School of Mathematical Sciences, University of Nottingham. Within the EU project MiDEA, the academical results have been implemented into software and since then have been extended for practical use by InuTech GmbH.
Discrete Flow Mapping DFM
The term DEA describes the method in general. The term DFM (Discrete Flow Mapping) is used in science for the specific software implementation of DEA on triangulated meshes. Triangulated meshes are a too strong restriction in industrial applications. Therefore, inuTech implements an extended version of DFM that is capable to treat quadrilateral and any convex polygonal elements. Thus, finite element meshes (FEM) are fully supported.
- DEA — Dynamical Energy Analysis
- DFM — Discrete Flow Mapping
- FEM — Finite Element Method
- SEA — Statistical Energy Analysis