Modal Analysis

What is Modal Test?

  • Determine … of an object
  • Natural frequencies
  • Modal masses
  • Modal damping ratios
  • Mode shapes
  • Characterizes the dynamics of a structure as a combination of “modes” of vibration

modal_test

How?

  • Excite test object with controllable known frequency content (Shaker or Impact Hammer)
  • Acquire test data
  • Perform modal analysis

What can be the test object?

  • Vehicle
  • Aircraft
  • Spacecraft
  • Wind turbine
  • Engine test cell
  • Consumer Electronic Product

modal_analysis

Highlights

  • Supports modal analysis utilities
    • Power Spectrum Summation
    • Normal Mode Indicator Function (MIF)
    • Multivariate MIF
    • FRF Synthesis
    • Curvefitting
    • Shape Estimation
    • Modal Model Validation
    • Operating Deflection Shapes (ODS)
  • Powerful post processing display and Visualizer