This paper describes a cumulative harmonic analysis (CHA) that replaces the stepwise time window function of Berman and\r\nFincham�s cumulative spectral analysis with a spectral accumulation function, thereby enabling a new structural health monitoring\r\nmethod. CHA estimates and visualizes system damping conditions without the need of transient-vibration records. The damping\r\nconditions are closely related to the spectral distribution around the dominant spectral peaks due to structural resonance. This\r\ntype of spectral distribution can be visualized with CHA even within a short interval of random vibration samples. The effect of\r\nCHA on monitoring the damping conditions was reported by the authors in a previous study. In the current study, the authors\r\nconfirmed the usefulness of CHA for structural condition monitoring by conducting scale-model experimen
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