03 February 2021 2 10K Report

Hello, Everyone,

I have a few queries regarding the rain flow counting algorithm.

**I have used MATLAB syntax “rainflow(ext)” for counting. I am getting 3 rows as a result which are amplitude, mean, and cycle (half or full). But, the calculation of the life estimation and damage is requiring the number of cycles, cycle period, and on-time. How do we get these values from the counting algorithm?

** How do we group the stress cycles based on amplitude range? How can we compute the corresponding mean value, on-time, and a number of cycles for that particular amplitude range?

** what I am looking for is the total number of counts against each amplitude or range. Like, if I have twenty 0.5 cycles mentioned against a range of 0.01 in 20 different rows. I want a single row answer of 10 cycles against a range of 0.01 and so on for every different range. Basically, I want to use this algorithm on my load vs time signal and extract cycles, and then use the miner damage rule to predict the remaining life. so I am interested in a table of the number of total cycle counts and their corresponding amplitude. and so on for every amplitude.

** I have used the same curve for rain flow analysis in MATLAB 2014a, and 2017b. Both versions have given two different results for the same input. Why?

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