Timeline for Why is my simple RK4 failing to capture adequate spring deformation?
Current License: CC BY-SA 4.0
13 events
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| Jul 1, 2022 at 3:00 | history | tweeted | twitter.com/StackPhysics/status/1542704548313178113 | ||
| Jun 28, 2022 at 18:10 | history | edited | Chair | CC BY-SA 4.0 |
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| Jun 28, 2022 at 17:50 | history | edited | Chair | CC BY-SA 4.0 |
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| Jun 28, 2022 at 17:24 | vote | accept | Chair | ||
| Jun 28, 2022 at 17:23 | vote | accept | Chair | ||
| Jun 28, 2022 at 17:24 | |||||
| Jun 28, 2022 at 4:49 | answer | added | rob♦ | timeline score: 3 | |
| Jun 27, 2022 at 20:53 | comment | added | Chair | I started the simulation right at initiation of contact, and got effectively the same elongations :/ | |
| Jun 27, 2022 at 20:43 | comment | added | Chair | That's a good point! I'll start the RK4 at the time of collision and see if I can't recover the elongation that Kvante Kaffe (person who answered linked question) was able to capture in his model. However, can I not capture this transition by making my derivative functions appropriately defined piecewise? Give a small enough h it would be similar to just starting a new RK4 at the transition point, no? | |
| Jun 27, 2022 at 20:19 | comment | added | John Alexiou | I have faced the same issue myself. Note that when the spring engages it changes the system, and the RK4 assumes there is no change in the system during each time step. To model the correctly you need to create a time step at the moment the physics change. | |
| Jun 27, 2022 at 19:50 | history | edited | Qmechanic♦ | CC BY-SA 4.0 |
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| Jun 27, 2022 at 19:35 | history | edited | Chair | CC BY-SA 4.0 |
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| S Jun 27, 2022 at 19:31 | review | First questions | |||
| Jun 27, 2022 at 20:12 | |||||
| S Jun 27, 2022 at 19:31 | history | asked | Chair | CC BY-SA 4.0 |