Using EFDD as a Robust Technique for Deterministic Excitation in Operational Modal Analysis

摘要

For assessing the quality of the method, various experiments were carried out on a plate structure excited by respectively a pure stochastic signal and the same stochastic signal superimposed by a deterministic signal. Good agreement was found in terms of both natural frequencies, damping ratios and mode shapes. Even the influence of a deterministic signal located exactly at a natural frequency can be practically eliminated.