Actran 2025.1: The Comprehensive Environment for Advanced Acoustic Engineering

Actran 2025.1 is a premium, high-fidelity software suite dedicated to solving the most complex challenges in acoustics and vibration. It provides a unified platform for engineers and researchers to accurately predict, analyze, and optimize the noise and vibration behavior of products and systems. From the hum of an electric motor to the roar of a jet engine or the interior quietness of a luxury vehicle, Actran’s robust finite element (FEM) and boundary element (BEM) solvers, combined with specialized physics, deliver the precision required for confident design decisions in industries where acoustic performance is a critical competitive factor.

Core Philosophy: Solving the Full Acoustic Chain
Actran’s strength lies in its ability to model the complete “source-path-receiver” chain of noise generation and propagation. It doesn’t just analyze sound in air; it excels at simulating the complex interactions where vibrations in a structure radiate sound into a fluid (vibro-acoustics) and where turbulent fluid flows generate noise (aeroacoustics). This integrated, multi-physics approach is essential for developing effective noise control solutions.

Key Application Areas & Technical Capabilities:

1. Vibro-Acoustics & Structural-Borne Noise

  • Coupled Fluid-Structure Analysis: Simulates how vibrations from engines, gears, or rotating machinery radiate sound into surrounding air or enclosed cavities (e.g., vehicle passenger compartments, aircraft cabins, appliance housings).

  • Trimmed Body & Interior Acoustics: Specialized workflows for modeling the complex acoustic treatments in vehicles, including multilayer absorbers (carpet, foam), barriers, and damping materials.

  • Sound Transmission Loss (STL): Calculates the effectiveness of panels and partitions in blocking airborne sound, crucial for architectural acoustics and product encapsulation.

2. Advanced Aeroacoustics & Flow-Induced Noise

  • Jet & Fan Noise: Employs advanced acoustic analogies (Lighthill, FW-H) to predict noise generated by turbulent flows from jets, exhausts, fans, and propellers.

  • Computational Fluid Dynamics (CFD) Coupling: Seamlessly integrates with leading CFD software (like ANSYS Fluent or OpenFOAM) to use unsteady flow data as the acoustic source for far-field noise propagation.

  • Cavity & Duct Acoustics: Models whistle and roar phenomena in automotive side mirrors, sunroofs, HVAC systems, and intake/exhaust ducts.

3. Electromagnetic-Acoustics & Transducer Modeling

  • Electro-Acoustic Devices: Designs and simulates the performance of speakers, microphones, buzzers, and ultrasonic sensors by coupling electromagnetic forces with structural vibration and sound radiation.

  • Piezoelectric & MEMS Modeling: Analyzes devices that convert electrical energy to mechanical motion and vice versa.

4. Robust Solver Technology & Efficient Analysis

  • High-Performance Solvers: Leverages direct and iterative solvers optimized for large-scale acoustic problems, with efficient solution strategies for broad frequency ranges.

  • Acoustic Transfer Vectors (ATV) & Modal-Based Approaches: Enables extremely fast design studies and optimization by decoupling the structural response from the acoustic radiation calculation.

  • Immersive Audio & Sound Quality: Supports binaural rendering (listening to simulated sounds through headphones) and calculates psychoacoustic metrics (loudness, sharpness, roughness) to correlate simulation with human perception.

actran 2025.1
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