Numerical Acoustics

GLSV-numerical-acoustics

Numerical Acoustic Analysis

GLSV uses numerical acoustic analysis to provide engineering solutions to a wide range of problems. Utilizing VaOne, a highly capable vibro-acoustic analysis product, GLSV models components, systems, or scenarios with the optimal level of fidelity to provide for a solid physical understanding and basis for developing engineered noise and vibration solutions.

numerical-acoustics-analysis

Vibro-Acoustic Hybrid Modeling – Components

GLSV uses vibro-acoustic modeling to solve for all contributing structural and acoustical modes and excitations in a frequency band of interest for a particular component of interest. Leveraging a deep history in noise and vibration root cause studies, testing, and manufacturing, GLSV uses vibro-acoustic modeling to understand the root of a problem and develop a practical solution.

  • glsv-vibro-acoustic-modelingBoundary Element Method (BEM) Radiation
    • Efficient and accurate method for modeling fluid loading, scattering, radiation, and transmission at low frequencies
  • Structural Finite Element (FE)
  • Acoustic Finite Element (FE)
    • Low to mid frequency
  • Statistical Energy Analysis (SEA)
    • High frequency structural and acoustic capabilities
  • Hybrid Modeling
    • Capable of capturing a full range of frequencies with the correct level of fidelity

Vibro-Acoustic Hybrid Modeling – Systems

vibro-acoustic-modeling-systemsNoise levels of complex systems are growing problem in a wide range of industries. With current vibro-acoustic modeling capabilities, GLSV is able to model complex systems including full vehicles or scenarios to gain an accurate physical sense of the noise sources, transfer paths, and perceived noise levels throughout the physical domain of interest.

  • Vehicle modeling
  • Scenario modeling
  • Human factors
  • Sound quality
  • Speech clarity
    • Articulation Index
  • Detection range

Vibro-Acoustic Hybrid Modeling – Validation

vibro-acoustic-modeling-validationValidation of numerical modeling is critical to producing accurate models and optimal solutions. GLSV combines acoustic and vibration testing capabilities with vibro-acoustic modeling to ensure accuracy.

  • Validation Criteria
  • Insertion loss
  • Transmission loss
  • Sound Pressure Level (SPL)
    • 1/3 Octave
    • Narrow band
  • Transfer functions
  • Damping loss factor
  • Modes in Band

Analysis

GLSV Added Value

  • Concept development
  • CFD
  • Structural Analysis
  • Architectural Analysis
  • Environmental Analysis
  • NVH Performance
  • Shock and Vibration Modeling
  • Root Cause Studies
  • Powertrain NVH