摘要：Analysis of signals based on spectral accumulation has great potential for enabling the condition
of structures excited by natural forces to be monitored using random vibration records. This
article describes cumulative harmonic analysis (CHA) that was achieved by introducing a spectral
accumulation function into Berman and Fincham's conventional cumulative analysis, thus enabling
potential new areas in cumulative analysis to be explored. CHA effectively enables system
damping and modal overlap conditions to be visualized without the need for transient-vibration
records. The damping and modal overlap conditions lead to a spectral distribution around dominant
spectral peaks due to structural resonance. This distribution can be revealed and emphasized
by CHA records of magnitude observed even within short intervals in stationary random vibration
samples.
