MSC Actran 2024 | 778.0 mb
Actran is a general purpose finite element program for modelling sound propagation, transmission and absorption in an acoustic, vibro-acoustic or aero-acoustic context. a large material library: – acoustic fluid;– thin acoustic layer and narrow tubes (or channels) including viscothermal effects;– visco-elastic solids, solid shells, thin shells and beams;– incompressible solids;– composite materials;– lumped mass and springs (discrete structural elements);– rigid porous, lumped porous and poro-elastic materials (Biot theory) a complete element library:– linear and quadratic– 2D, 3D and axisymmetric– standard volume elements and special transverse elements for the- accurate modelling of special configurations: shells, stiffeners, thin acoustic layers– conjugated infinite elements or adaptive PML elements for acoustic radiation a rich set of boundary conditions, operating conditions and sources:– acoustic sources;– incident and free duct modes for rotating machines;– pressure, velocity, acceleration and admittance boundary conditions;– kinematical excitations : imposed displacements and rotations;– mechanical excitations : point load, distributed load, distributed pressure, moments;– in-build models of real-life excitations : incident diffuse sound field or various models of turbulent boundary layer– interface with the leading structural FEA software packages (Nastran, Ansys and Abaqus) for the import of dynamical results– interface with the leading CFD software packages (among others:Fluent, star-CD and CFX) for the import of the heterogeneities of the acoustic medium and the computation of the aero-acoustic sources– volume-based and surface-based aerodynamic source terms (Lighthill’s and Möhring’s analogies) for analyzing broad-band noise generation by turbulent flows; several unique features (non exhaustive list):– sound propagation and absorption in a non-uniformly moving fluid;– sound propagation in non-isothermal conditions;– sound propagation in rotating acoustic components;– sound propagation taking into account visco-thermal losses occurring in thin air layers, tubes or arbitrarily-shaped cavities– random acoustics in both modal and physical coordinates; multiple calculation procedures:– direct frequency response analysis– modal frequency response analysis using existing Actran, Ansys or Nastran normal modes– compressible flow analysis– modal extraction various solution strategies:– restart capability– multiple load capability– strong or weak vibro-acoustic coupling– multi-level sequence tree to avoid unnecessary re-computations– hybrid Modal/Physical approaches in-core and out-of-core solvers supporting sequential and parallel (SMP and DMP) computer architectures– fast frequency response synthesis using the KRYLOV solver. System Requirements:OS:Windows 10/Windows 7 (with SP1)CPU: any x86-64 processor that supports the SSE3 extensions (such as the AMD Opteron and Intel Xeon)GPU: NVidia Tesla K40, K80 or P100*Graphics:OpenGL-3.2
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