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Joined: 23/12/2011(UTC) Posts: 319   Location: italy Was thanked: 109 time(s) in 93 post(s)
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I turned a script that I had made in Scilab to use it in Smath. The sheet serves to evaluate the moment diagram - curvature of a rectangular armed concrete section (useful then for further evaluations of the ductility of section ...) The reduced version, which I am attaching here seems to provide correct results (or at least congruent with those obtained with Scilab ); However the slowness discourages in continuing with the completion of the procedure. Does anyone have any improvement idea? I tried with a sheet without a unit of measurement; I get a 50% time reductions but it is always very especially wanting to get more dense discretion.  DuttilitaPressoflessione_R(forum).pdf (134kb) downloaded 23 time(s). DuttilitaPressoflessione_R(forum).sm (216kb) downloaded 18 time(s).sergio
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 Rank: Advanced Member Groups: Registered
Joined: 28/08/2014(UTC) Posts: 1,359  Was thanked: 819 time(s) in 518 post(s)
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Ciao Sergio. You can deal with this version of a numerical solver. Other improvements may be to avoid evaluating the integral for the cases x <h in f and M using if, and even to use your own numerical integrator, but this version seems fast enough. DuttilitaPressoflessione_R(forum).sm (220kb) downloaded 13 time(s).Best regards. Alvaro.
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Rank: Advanced Member Groups: Registered
Joined: 23/12/2011(UTC) Posts: 319 Location: italy Was thanked: 109 time(s) in 93 post(s)
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Alvaro, I don't think it's correct; I say this because I see that some users have downloaded your file and I wouldn't want to induce anyone wrong. It takes time to understand, but I believe it is a problem linked to the management of the units of measure with the solver you proposed purely numerical. sergio Edited by user 07 November 2021 00:58:56(UTC)
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Rank: Advanced Member Groups: Registered
Joined: 28/08/2014(UTC) Posts: 1,359 Was thanked: 819 time(s) in 518 post(s)
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Hi Sergio. It could be because f is actually function of two variables, f(x,χ). This other setup ensure (I think) that at each loop the solver takes the new χ value. DuttilitaPressoflessione_R(forum).sm (223kb) downloaded 24 time(s).Best regards. Alvaro.
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 2 users thanked Razonar for this useful post.
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on 07/11/2021(UTC), on 08/11/2021(UTC)
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Rank: Advanced Member Groups: Registered
Joined: 23/12/2011(UTC) Posts: 319 Location: italy Was thanked: 109 time(s) in 93 post(s)
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Alvaro, great now works well and quickly Thanks! sergio Edited by user 07 November 2021 19:38:34(UTC)
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Rank: Advanced Member Groups: Registered
Joined: 28/08/2014(UTC) Posts: 1,359 Was thanked: 819 time(s) in 518 post(s)
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Hi Sergio. You're a gentleman. You're right, I don't pay enough attention in my first post, and look only to the final result, but not it was stable or what.
Best regards.
Alvaro
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1 user thanked Razonar for this useful post.
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