Difference between revisions of "EntrainedSeawater"

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(New page: Category:RequirementComfortCategory:OfficialDesignPattern == Description == In order to reduce wave motions, we can increase effective mass by entraining seawater. == Solutions ==...)
 
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== Description ==
 
== Description ==
 
In order to reduce wave motions, we can increase effective mass by entraining seawater.
 
In order to reduce wave motions, we can increase effective mass by entraining seawater.
  
== Solutions ==
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== Details ==
  
This can be done by surrounding the water, like a semisub, or using large baffles (heave plates). Hanging ballast can function as heave plates.
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Entrained seawater is seawater which must move when the platform moves.  This increases the effective inertial mass of the platform, and thus its resistance to motion.  For example, imagine adding an enormous, thin disc to the bottom of a spar.  This disc adds very little mass, but provides enormous resistance against vertical movements ([[heave]]), because of how much water it entrains.
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This can be implemented by:
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* Fully surrounding the water, like a semisub
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* Using large baffles (heave plates). Hanging ballast can function as heave plates.
  
 
This pattern can be used in many different designs, by simply adding underwater baffles or plastic bags/containers, which are filled with seawater and thus neutrally buoyant.
 
This pattern can be used in many different designs, by simply adding underwater baffles or plastic bags/containers, which are filled with seawater and thus neutrally buoyant.

Latest revision as of 07:41, 31 August 2008

WARNING: This is an official page, which means that you shouldn't edit it unless you work for TSI or have been explicitly told you can. Feel free to comment on the talk page, link to it, or use categories that it mentions (unless they contain the world "Official").


Description

In order to reduce wave motions, we can increase effective mass by entraining seawater.

Details

Entrained seawater is seawater which must move when the platform moves. This increases the effective inertial mass of the platform, and thus its resistance to motion. For example, imagine adding an enormous, thin disc to the bottom of a spar. This disc adds very little mass, but provides enormous resistance against vertical movements (heave), because of how much water it entrains.

This can be implemented by:

  • Fully surrounding the water, like a semisub
  • Using large baffles (heave plates). Hanging ballast can function as heave plates.

This pattern can be used in many different designs, by simply adding underwater baffles or plastic bags/containers, which are filled with seawater and thus neutrally buoyant.