DIAdem Rainflow Classification has Different Results for Similar Data Sets

Updated Apr 2, 2018

Reported In

Software

  • DIAdem

Issue Details

I am using the DIAdem Rainflow Classification to analyze fatigue data. As part of this analysis, I am using the option of closing and including the residues to ensure that residues are included in the count. I have two sets of data that are very similar but have different results. In one set of data, the large increase at the end of the data is counted as a cycle, but in the other it is not. Why is this?

Solution

The Rainflow Classification in DIAdem attempts to find residues that can be closed, and counts those as cycles. If the analysis is including a cycle count for one set of data, but not another, it is likely due to the residue not being able to be closed.

Additional Information

For more information, please view our online sources on the algorithm of the Rainflow Classification.

The Rainflow Classification is based on information from the Forschungsvereinigung Antriebstechnik (Research Institute for Power Train Engineering) Brochure FVA 131 IV.

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