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Additive Damage Analysis of the Frequency Damage Spectrum

The Frequency Damage Spectrum provides relative damage with damage values across the spectrum at frequency intervals. Is it possible to sum these damage values to provide a relative damage comparison? This presentation will compare relative damage of strain response of 2 different specimens to the additive damage of the Frequency Damage Spectrum for different duty cycles to see if it's feasible or not.

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Challenge

Need to compare different riding events using fatigue damage metrics
No established method for relative damage comparison

Solution

Recognize resonant frequencies, either using physical measurements (and VibeSys software) or virtual predictions (and DesignLife software).
Focus fatigue damage analysis on frequencies near resonance.

Value

Interpret damage comparison results intelligently.
Compare which riding events are most damaging and hence critical to design.

Acoustics and vibration analysis

nCode VibeSys is a data processing system that contains a powerful set of pre-defined tools for performing acoustics and vibration analysis. In addition to general signal processing, VibeSys contains dedicated analyses for early fault detection in rotating machinery, rating human reactions to sounds and vibrations, and for characterizing the dynamics of a structure.

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CAE-based fatigue analysis

nCode DesignLife is an up-front design tool that identifies critical locations and calculates realistic fatigue lives from leading finite element (FE) results for both metals and composites. Design engineers can go beyond performing simplified stress analysis and avoid under- or over-designing products by simulating actual loading conditions to avoid costly design changes.