Computing Natural Frequency of a Torus System: 3D vs. 2D Added Mass

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Discussion Overview

The discussion revolves around computing the natural frequency of a torus system in heaving motion, specifically focusing on the application of added mass terms in the equations. Participants explore the differences between using 3D and 2D added mass formulas.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant seeks clarification on whether to use the 3D added mass formula for a torus in heaving motion and questions the conditions under which the 2D added mass formula would be appropriate.
  • Another participant suggests that the specificity of the question may limit responses, indicating it may not be common knowledge.
  • A request is made for a reference to the paper mentioned, as well as further details about the concept of "heaving motion of a torus."

Areas of Agreement / Disagreement

The discussion does not show clear agreement, as participants are still seeking information and clarification on the topic, indicating that multiple views or uncertainties may exist.

Contextual Notes

The discussion lacks specific definitions of "heaving motion" and the conditions under which 2D versus 3D added mass should be applied, leaving these assumptions unresolved.

Fluidman117
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Hi!

I am trying to compute the natural frequency of a system and I also need to add the added mass term to my equation. The object I have is a torus and is basically in heaving motion. I found a good paper, which gives a formula for 3d added mass and 2d added mass.

I would figure that I have to use the 3d added mass formula, correct? But when and why do you need to use the 2D added mass?

Thanks!
 
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anyone?
 
Just give it a little time. Your question is very specific and not general knowledge to most of us.
 
A reference to the paper would help as well - or at least some clues about what you mean by "heaving motion of a torus".
 

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