MOD-101 Modal Basics (October 2025)
MOD-101 Modal Basics (October 2025)
Kannapolis, North Carolina - October2025
Overview: Introduction to modal analysis. Though review of theory with best practices for instrumentation and excitation. Explanation of boundary conditions and their effect of modal frequencies and shapes. Detailed parameter estimation and mode indicator functions explanations. Valuable hands on measurements both using impact hammer and shaker.
Modal theory - comprehensive theory
Digital signal processing digitization, quantization, aliasing, leakage, windows
FRF measurement - Linear/Power Spectra, Frequency Response Function, Coherence, Noise
Impact measurement modal test
Group measurements–familiarity with DAQ and measurement issues (hammer/tips; force/exponential windows; FRF/coherence, double impacts)Shaker for MIMO modal test Mode indicator functions
Modal parameters estimation concepts, Model validation
Complete the entire modal test, perform second test with different references