Beginners guide to doing (1) Base Shake analysis and (2) Multi-input analysis within the Frequency Domain

Frequency domain methods for fatigue analysis and/or for general random response analysis have experienced a resurgence over the last few years due to improved technology and better computational processes. Today, a complete range of models can be processed from full vehicle systems to local component systems. Single input BASE shake loads and multiple correlated input loads can now be easily processed by the User. These loading conditions can also contain random PSDs and/or deterministic components like a sine sweep. Different kinds of fatigue life calculations can be done including both Stress-Life and Strain-Life approaches.

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