Talk:Rainflow-counting algorithm - Revision history

Supyovalk: Assessment: banner shell, Physics (Rater)

2024-09-06T18:02:58Z

Assessment: banner shell, Physics (Rater)

← Previous revision		Revision as of 18:02, 6 September 2024
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	{{WikiProject banner shell\|class=\|		{{WikiProject banner shell\|class=Start\|1=
	{{~~physics}}~~ }}		{{WikiProject Physics}}
			}}

	== Mistake in table ==		== Mistake in table ==

Johnsoniensis: phys

2024-06-11T17:38:34Z

phys

← Previous revision		Revision as of 17:38, 11 June 2024
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	{{WikiProject banner shell\|class=}}		{{WikiProject banner shell\|class=\|
			{{physics}} }}

	== Mistake in table ==		== Mistake in table ==

Qwerfjkl (bot): Adding {{WikiProject banner shell}} (Task 19)

2023-08-13T12:43:29Z

Adding {{WikiProject banner shell}} (Task 19)

← Previous revision		Revision as of 12:43, 13 August 2023
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			{{WikiProject banner shell\|class=}}

	== Mistake in table ==		== Mistake in table ==
	I may have done a mistake myself but the results in the table of the example seems wrong. I am caculating these results instead :		I may have done a mistake myself but the results in the table of the example seems wrong. I am caculating these results instead :

Frsix at 13:44, 27 August 2021

2021-08-27T13:44:57Z

← Previous revision		Revision as of 13:44, 27 August 2021
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			== Mistake in table ==
			I may have done a mistake myself but the results in the table of the example seems wrong. I am caculating these results instead :
			(W for Whole, H for Half)

			10 (2W) ; 13 (2H) ; 14 (1H) ; 16 (1W 1H) ; 17 (1H) ; 19 (2H) ; 20 (1H) ; 24 (1H)

			It doesn't seem to have place for any 29 or 22 for example.
			[[User:Frsix\|Frsix]] ([[User talk:Frsix\|talk]]) 15:43, 27 August 2021 (UTC)

	== Reference to Sandia code ==		== Reference to Sandia code ==
	It is irrelevant to mention the Sandia National Laboratories LIFE2 code. It sounds as publicity.		It is irrelevant to mention the Sandia National Laboratories LIFE2 code. It sounds as publicity.

SineBot: Signing comment by Franzxf5 - "Suggesting upoad of new figures to correct errors, errors in table with results also assumed."

2020-03-11T18:15:09Z

Signing comment by Franzxf5 - "Suggesting upoad of new figures to correct errors, errors in table with results also assumed."

← Previous revision		Revision as of 18:15, 11 March 2020
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	Hello, i generated two new figures (3 and 4) that should correct the errors.		Hello, i generated two new figures (3 and 4) that should correct the errors.
	While generating the new images, i also tried to use the same values as in the existing example. When evaluating this profile, i also noticed, that the results presented in the table seem to be not correct. I will update the figures, and i think i will present the suggested table values here for a few days before changing the values in the article.		While generating the new images, i also tried to use the same values as in the existing example. When evaluating this profile, i also noticed, that the results presented in the table seem to be not correct. I will update the figures, and i think i will present the suggested table values here for a few days before changing the values in the article. <!-- Template:Unsigned --><small class="autosigned">— Preceding [[Wikipedia:Signatures\|unsigned]] comment added by [[User:Franzxf5\|Franzxf5]] ([[User talk:Franzxf5#top\|talk]] • [[Special:Contributions/Franzxf5\|contribs]]) 18:14, 11 March 2020 (UTC)</small> <!--Autosigned by SineBot-->

	== Link to German page ==		== Link to German page ==

Franzxf5: Suggesting upoad of new figures to correct errors, errors in table with results also assumed.

2020-03-11T18:14:02Z

Suggesting upoad of new figures to correct errors, errors in table with results also assumed.

← Previous revision		Revision as of 18:14, 11 March 2020
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	Moreover, imagine if the stress history started at -15 (location of the (A) in Figure 3) and terminated at the same value: Half-cycle 5 would continue down to -15. But there would be no matching cycle among the compressive valleys. This is incorrect according to https://www.sciencedirect.com/topics/engineering/rainflow-counting - "When a loading history is periodic, the loading history needs to be rearranged to start from the largest extremum point and this extremum point is repeated at the end, in effect closing the largest hysteresis loop. All inner reversals therefore pair up to form cycles."		Moreover, imagine if the stress history started at -15 (location of the (A) in Figure 3) and terminated at the same value: Half-cycle 5 would continue down to -15. But there would be no matching cycle among the compressive valleys. This is incorrect according to https://www.sciencedirect.com/topics/engineering/rainflow-counting - "When a loading history is periodic, the loading history needs to be rearranged to start from the largest extremum point and this extremum point is repeated at the end, in effect closing the largest hysteresis loop. All inner reversals therefore pair up to form cycles."
	I would thus definitely agree that the image is wrong. --[[User:User5849\|User5849]] ([[User talk:User5849\|talk]]) 10:00, 13 September 2019 (UTC)		I would thus definitely agree that the image is wrong. --[[User:User5849\|User5849]] ([[User talk:User5849\|talk]]) 10:00, 13 September 2019 (UTC)

			Hello, i generated two new figures (3 and 4) that should correct the errors.
			While generating the new images, i also tried to use the same values as in the existing example. When evaluating this profile, i also noticed, that the results presented in the table seem to be not correct. I will update the figures, and i think i will present the suggested table values here for a few days before changing the values in the article.

	== Link to German page ==		== Link to German page ==

User5849: /* Reply regarding the "mistake" */

2019-09-13T10:00:05Z

Reply regarding the "mistake"

← Previous revision		Revision as of 10:00, 13 September 2019
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	I'm not an expert too. But the example C of figure 3 is a counter example of your argument.		I'm not an expert too. But the example C of figure 3 is a counter example of your argument.
	--[[User:Irmo322\|Irmo322]] ([[User talk:Irmo322\|talk]]) 19:58, 20 December 2018 (UTC)		--[[User:Irmo322\|Irmo322]] ([[User talk:Irmo322\|talk]]) 19:58, 20 December 2018 (UTC)

			"If you use the new flow it merges with as a reference" - you don't, though. The new flow is the one that terminates as it merges with the older one. The wikipedia page itself states this.<br>
			Moreover, imagine if the stress history started at -15 (location of the (A) in Figure 3) and terminated at the same value: Half-cycle 5 would continue down to -15. But there would be no matching cycle among the compressive valleys. This is incorrect according to https://www.sciencedirect.com/topics/engineering/rainflow-counting - "When a loading history is periodic, the loading history needs to be rearranged to start from the largest extremum point and this extremum point is repeated at the end, in effect closing the largest hysteresis loop. All inner reversals therefore pair up to form cycles."
			I would thus definitely agree that the image is wrong. --[[User:User5849\|User5849]] ([[User talk:User5849\|talk]]) 10:00, 13 September 2019 (UTC)

	== Link to German page ==		== Link to German page ==

NeedsGlasses: Note on removing ref to Sandia

2019-07-16T14:17:45Z

Note on removing ref to Sandia

← Previous revision		Revision as of 14:17, 16 July 2019
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			== Reference to Sandia code ==
	It is irrelevant to mention the Sandia National Laboratories LIFE2 code. It sounds as publicity.		It is irrelevant to mention the Sandia National Laboratories LIFE2 code. It sounds as publicity.
			:* Agreed. It has been removed -[[User:NeedsGlasses\|NeedsGlasses]] ([[User talk:NeedsGlasses\|talk]]) 14:17, 16 July 2019 (UTC)


	== Mistake in Figure 4? ==		== Mistake in Figure 4? ==

NeedsGlasses: /* Most popular as of 2008? */

2019-07-15T01:05:13Z

Irmo322 at 19:59, 20 December 2018

2018-12-20T19:59:37Z

← Previous revision		Revision as of 19:59, 20 December 2018
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	== Mistake in Figure 4? ==		== Mistake in Figure 4? ==
	I'm by no means an expert in this field, but from reading the algorithms it seems to me that the topmost blue half cycle in figure 4 (starting at around value -14) should "water drop" downwards until it reaches the righmost peak at value +15. This, in turn would influence the some later troughs. If this is no error, please help me correct my understanding of the algorithm. [[User:Bleistiftspitzer\|Bleistiftspitzer]] ([[User talk:Bleistiftspitzer\|talk]]) 14:16, 6 November 2012 (UTC)		I'm by no means an expert in this field, but from reading the algorithms it seems to me that the topmost blue half cycle in figure 4 (starting at around value -14) should "water drop" downwards until it reaches the righmost peak at value +15. This, in turn would influence the some later troughs. If this is no error, please help me correct my understanding of the algorithm. [[User:Bleistiftspitzer\|Bleistiftspitzer]] ([[User talk:Bleistiftspitzer\|talk]]) 14:16, 6 November 2012 (UTC)

			I agree with you, the figure 4 needs to be corrected.
			--[[User:Irmo322\|Irmo322]] ([[User talk:Irmo322\|talk]]) 19:58, 20 December 2018 (UTC)

	== Reply regarding the "mistake" ==		== Reply regarding the "mistake" ==
	As the flow merges with the following flow (starting about 0) I think it flows opposite a tensile peak of greater magnitude. If you use the new flow it merges with as a reference this is true for Figure 4. But this is just my understanding of it and I'm no expert on the matter. <span style="font-size: smaller;" class="autosigned">— Preceding [[Wikipedia:Signatures\|unsigned]] comment added by [[Special:Contributions/46.235.154.16\|46.235.154.16]] ([[User talk:46.235.154.16\|talk]]) 13:06, 13 December 2012 (UTC)</span><!-- Template:Unsigned IP --> <!--Autosigned by SineBot-->		As the flow merges with the following flow (starting about 0) I think it flows opposite a tensile peak of greater magnitude. If you use the new flow it merges with as a reference this is true for Figure 4. But this is just my understanding of it and I'm no expert on the matter. <span style="font-size: smaller;" class="autosigned">— Preceding [[Wikipedia:Signatures\|unsigned]] comment added by [[Special:Contributions/46.235.154.16\|46.235.154.16]] ([[User talk:46.235.154.16\|talk]]) 13:06, 13 December 2012 (UTC)</span><!-- Template:Unsigned IP --> <!--Autosigned by SineBot-->

			I'm not an expert too. But the example C of figure 3 is a counter example of your argument.
			--[[User:Irmo322\|Irmo322]] ([[User talk:Irmo322\|talk]]) 19:58, 20 December 2018 (UTC)

	== Link to German page ==		== Link to German page ==

← Previous revision		Revision as of 01:05, 15 July 2019
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	Any data to support that claim? <!-- Template:Unsigned IP --><small class="autosigned">— Preceding [[Wikipedia:Signatures\|unsigned]] comment added by [[Special:Contributions/104.129.196.110\|104.129.196.110]] ([[User talk:104.129.196.110\|talk]]) 16:18, 7 July 2016 (UTC)</small> <!--Autosigned by SineBot-->		Any data to support that claim? <!-- Template:Unsigned IP --><small class="autosigned">— Preceding [[Wikipedia:Signatures\|unsigned]] comment added by [[Special:Contributions/104.129.196.110\|104.129.196.110]] ([[User talk:104.129.196.110\|talk]]) 16:18, 7 July 2016 (UTC)</small> <!--Autosigned by SineBot-->

			:* It has been removed. It was unsupportable and not very informative. [[User:NeedsGlasses\|NeedsGlasses]] ([[User talk:NeedsGlasses\|talk]]) 01:04, 15 July 2019 (UTC)