EXCITE Acoustics

What is EXCITE Acoustics ?

EXCITE Acoustics is a tool for the calculation of free-field sound radiation from vibratory structures, such as motors and power units, using the Wave Based Technique (WBT).

The interfaces of the common FE tools for importing the vibratory structure geometry and the pre-calculated structural vibration (surface velocity limit condition) facilitate seamless integration into the NVH simulation workflow as the final step of acoustic analysis.

Business Scope:

Powertrain system development: AVL develops and improves all types of powertrain systems and is a competent partner to the automotive and engine industry. In addition, AVL develops and markets the simulation methods required for development work.

Engine Instrumentation and Test Systems: The products in this business area comprise all the instruments and systems required for the testing of engines and vehicles.

Advanced simulation technologies: The simulation software developed is focused on the design and optimization of powertrain systems and covers all phases of the development process.

Key Features and Benefits of EXCITE Acoustics

Highly efficient sound radiation calculation

Using previously calculated surface velocities as input, EXCITE Acoustics efficiently calculated free-field sound radiation and provides airborne noise results that are directly comparable with measured acoustic data and legal noise limits.

Wave-Based Technique (WBT)

The EXCITE Acoustics used is based on an indirect Trefftz approach, which expresses the dynamic acoustic pressure as a linear combination of wave functions, which exactly satisfies the homogeneous Helmholtz equation. Because fine discretization of the acoustic mesh is not required and does not depend on frequency, the acoustic models of the WBT are substantially smaller than the acoustic models required for element-based methods such as BEM or FEM. This allows you to get accurate results with high computational efficiency.

Automated WBT Model Generation

A unique fully automated procedure was implemented to generate the acoustic mesh from the unmodified FE structural mesh used for the structural vibration analysis. Thus, the acoustic simulation model can be set up easily and quickly with just a few clicks of the mouse.

Post-processing airborne noise results, such as sound pressure levels at microphone positions or arbitrary meshes of field points around the radiation structure, is a separate and quick final step. Microphone positions and field point meshes can therefore be added or modified without the need for sound radiation recalculation.

System Requirements:

CPU: 1.8GHz dual-core processor

RAM: 2 GB

HDD/SSD: 50 GB free space on the main drive

Operating system: Microsoft Windows 8 32-bit, Microsoft Windows 7 32-bit and Microsoft Windows Vista 32-bit

Resolution: 1024×768