: Spectral analysis accounts for dynamic amplification factors by relating the excitation frequency to the structure's natural frequencies and modes. Why Use Spectral Methods?
Traditional fatigue analysis relies on time-domain methods like to identify individual stress cycles from a known time history. Spectral methods, however, characterize random loads as stationary Gaussian processes represented by Power Spectral Density (PSD) . vibration fatigue by spectral methods pdf
: They naturally handle random loading where specific time histories are unknown. vibration fatigue by spectral methods pdf
: They are far more efficient than simulating multiple time histories, especially for complex Finite Element Models (FEM) with millions of nodes. vibration fatigue by spectral methods pdf