Derivative in Maple - How insert - Сообщения
Ctrl+Shift+K.
Russia ☭ forever, Viacheslav N. Mezentsev
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Valery Ochkov 05.12.2023 13:54:00
Можно попробовать, если будет доступен оригинальный документ Mathcad.
Russia ☭ forever, Viacheslav N. Mezentsev
Можно попробовать, если будет доступен оригинальный документ Mathcad.
Pendulum-Spring.xmcd (159,03 КиБ) скачан 271 раз(а).
Pendulum-Spring.xmcd (159,03 КиБ) скачан 271 раз(а).
The definition of l(t) must be inside or above the Mathcad block
Federpendel-block.sm (39,22 КиБ) скачан 283 раз(а).

Federpendel-block.sm (39,22 КиБ) скачан 283 раз(а).

Martin KraskaPre-configured portable distribution of SMath Studio: https://en.smath.info/wiki/SMath%20with%20Plugins.ashx
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Valery Ochkov 06.12.2023 04:16:00
Comparing with the usual elastic pendulum.

Ochkov elastic pendulum.sm (32,17 КиБ) скачан 271 раз(а).
Best regards.
Alvaro.
Ochkov elastic pendulum.sm (32,17 КиБ) скачан 271 раз(а).
Best regards.
Alvaro.
2 пользователям понравился этот пост
See please the Fig. 4.10 here
http://twt.mpei.ac.ru/ochkov/Ochkov-V-F-Engineering-Calc.pdf
Now I would like to rewrite this Russian-English book with SMath. Help me please!

http://twt.mpei.ac.ru/ochkov/Ochkov-V-F-Engineering-Calc.pdf
Now I would like to rewrite this Russian-English book with SMath. Help me please!

If F(t) is requested as result, you have to specify F'(t). k(F) is the tangential stiffness of the spring, the inverse of the tangential compliance.
Federpendel-NL.sm (13,71 КиБ) скачан 277 раз(а).

Federpendel-NL.sm (13,71 КиБ) скачан 277 раз(а).

Martin KraskaPre-configured portable distribution of SMath Studio: https://en.smath.info/wiki/SMath%20with%20Plugins.ashx
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More animations
https://community.ptc.com/t5/Mathcad/One-interesting-problrm-with-shue/td-p/635149
Let create it with SMath
Слабо?
https://community.ptc.com/t5/Mathcad/One-interesting-problrm-with-shue/td-p/635149
Let create it with SMath
Слабо?
In this version you can specify the initial force in the spring. The initial conditions for x and y are adjusted appropriately.

Federpendel-NL.sm (15,06 КиБ) скачан 283 раз(а).

Federpendel-NL.sm (15,06 КиБ) скачан 283 раз(а).
Martin KraskaPre-configured portable distribution of SMath Studio: https://en.smath.info/wiki/SMath%20with%20Plugins.ashx
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Your Mathcad Given/Odesolve ... solves via Maple.
Verhulst solves wrt limits ... pretty advanced.
Inst_Verhulst.sm (27,14 КиБ) скачан 283 раз(а).
Verhulst solves wrt limits ... pretty advanced.
Inst_Verhulst.sm (27,14 КиБ) скачан 283 раз(а).
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Valery Ochkov 08.12.2023 08:11:00
The equations of motion, using Lagrange dynamics, from this post:

ElasticPendulum.sm (244,53 КиБ) скачан 279 раз(а).
Best regards.
Alvaro.

ElasticPendulum.sm (244,53 КиБ) скачан 279 раз(а).
Best regards.
Alvaro.
2 пользователям понравился этот пост
WroteIn this version you can specify the initial force in the spring. The initial conditions for x and y are adjusted appropriately. ...
A comparison between Martin's solution and that given by the equations of motion obtained from the Lagrangian. Spoiler: both give the same result.
I'd like to point out how incredibly complicated this problem actually is, and what a series of brilliant implementations Martin makes. For example, where the hell does he get the time derivative of the force on an elastic bar when he is given only the length of the bar as a function of the force? Obviously, it is not enough to apply the theorem of the derivative of the inverse function, but you also have to have a deep knowledge of the mechanics of the system to remember something called tangential stiffness, and although it uses k to represent it, we forgive it because It's German and they are well known to use their own abbreviations. Well, actually I don't know what letter to use, because I don't remember ever using that magnitude for any practical purpose, but in Spanish literature it is quite common to use k for its inverse, which is the constant that appears in Hooke's law. Or at least I think so, because the existence of elastic bodies is actually a complication, they should all be rigid better.
Another notable thing about this example is that I would like someone to please explain to me how the hell the Viacheslav plugin manages to handle l'(t) within the equations, because I honestly didn't expect it.
Federpendel-NL - Lagrangian.sm (257,87 КиБ) скачан 319 раз(а).
Best regards.
Alvaro.
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Valery Ochkov 08.12.2023 08:10:00, Martin Kraska 08.12.2023 15:04:00, Вячеслав Мезенцев 08.12.2023 15:35:00
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