Rainflow Counting¶
The Addin RS_RAINFLOW is an extension for UniPlot to execute a rainflow counting algorithm.
Installation¶
Open the Addin Manager (Tools=>Add-In Manager) and mark the Addin Rainflow-counting algorithm.
After restart the User Toolbar should contain one new button: “Rainflow...”.
Usage¶
Load the stress data into a diagram, e.g. stress vs. time.
Select the new curve and click the Rainflow... button.
The following dialog box will be displayed:
Normalize signal in percent ‘round(signal/value*100‘): If this option is selected the rainflow cycles will be normalized in percent and rounded to the nearest integer.
Ignore all turning points with a range smaller than the following threshold: If this option is selected all rainflow cycles are removed, if the range is smaller than the given threshold: abs(Max-Min) > Schwelle). If the data is normalized the threshold must be specified in percent. Otherwise it is specified in the stress data units.
Combine cycles in output: If the option is selected the the number of occurrences of cycles with identical Min/Max values is calculated and printed in the last column. of the data table.
Template¶
An example template can be found in the \uniplot\addin\rs_rainflow directory. The template’s name is rainflow1.ipw. You can modify the template or use it to create a new template. Do not change diagram names. The names are used in the UniScript file.
The following diagrams are supported:
| Diagram Name | Meaning |
|---|---|
| RF-DutyCycle | Range (Min-Max) |
| RF-Hist-Ampli | Amplitude Histogram |
| RF-Hist-Mean | Average Histogram |
| RF-Matrix | Rainflow Matrix |
| RF-StressData | Original Data |
| RF-Hist-Max | Maximum Value Historgram |
UniScript Interface¶
See Rainflow_Batch.
Problems¶
If you have any problems using the addin please do not hesitate to contact us.
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