Advanced Modal Analysis Technique for Structures with Non-Uniform Mass Distribution

This paper presents a study of how the natural frequencies of bending vibration modes change for a double-clamped beam with a concentrated mass added to the beam mid-span. We compare the beam’s response under different loads using a contrived analytical relation and experimental results. The results show that we can estimate a small variation in mass distribution and that the frequency estimation method, especially developed by the authors to capture slight structural, is effective.