How to simulate a tether in an underwater tank

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Muda
Posts: 2
Joined: 20 Feb 2019, 12:29

How to simulate a tether in an underwater tank

Post by Muda » 20 Feb 2019, 15:47

Hi,

I am trying to see how a tether would behave underwater if it is attached to an ROV that does a preset motion (like a spiral downwards). To create the tether I am going to use cylinders with spherical joints.

Currently I am stuck on how to create a water tank (5 m x 5 m x 5 m) that will provide me with the correct behaviour. How would I manage to create this water tank in such a way for it provide me with adequate results?

Also, if you have any suggestions on how I can further improve the simulation as I am a total newbie to this software, please let me know!


Thanks in advance,
Muda

coppelia
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Posts: 7167
Joined: 14 Dec 2012, 00:25

Re: How to simulate a tether in an underwater tank

Post by coppelia » 21 Feb 2019, 14:58

Hello,

simulating a fluid is not that simple, and you will have to fake things by adding gravitation-compensation forces, and drag forces. Have a look how things were done in the HCM-R5 robot (models/robots/mobile/HCM-R5.ttm). There is a demo scene on buoyancy here.
Additionally, have a look here on how you can simulate a rope. But you will be limited by the rope length (i.e. number of individual segments), if you want the rope to behave in a stable manner.

Cheers

Muda
Posts: 2
Joined: 20 Feb 2019, 12:29

Re: How to simulate a tether in an underwater tank

Post by Muda » 22 Feb 2019, 15:41

coppelia wrote:
21 Feb 2019, 14:58
Hello,

simulating a fluid is not that simple, and you will have to fake things by adding gravitation-compensation forces, and drag forces. Have a look how things were done in the HCM-R5 robot (models/robots/mobile/HCM-R5.ttm). There is a demo scene on buoyancy here.
Additionally, have a look here on how you can simulate a rope. But you will be limited by the rope length (i.e. number of individual segments), if you want the rope to behave in a stable manner.

Cheers
Thanks for the suggestions and help! I will have a look at them in the next few days!

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