24 gennaio 2021
The experimental modal analysis identifies the main vibrational characteristics of mechanical structures such as natural frequencies, damping and modes of vibration.
Typical Modal Testing
Impact hammer excitation
Shaker based excitations (sine, sweep/chirp, random)
Using shaking tables and control systems, closed loop vibration tests are performed to verify the resistance to dynamic excitations.
sine excitation (amplitude and frequency control)
time varying frequency (Oct/min)
Track and Dwell
impulse tests: amplitude, pulse type (ISO, MIL-STD,...), and duration control
random: PSD user-defined, real time closed loop control
shaking table with or without slip-table (up to 40kN, 100g RMS)
Vibration measurements (In lab or on the field)
Vibration measurements: displacement, velocity, acceleration; determination of: spectra, max amplitude, RMS (bandwidth analysis).
Non-contact measurements: laser-Doppler vibrometer, laser telemeters
Typical application in Machine monitoring, Fault detection, Diagnostics, Prognostics
Climatic Test Chamber
Temperature (Humidity) & Vibration Combined Environmental Test Chamber (-70 +180°C)