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Sizing drop weights for deep diving submersibles taking into account non-uniform seawater density profiles

Sizing drop weights for deep diving submersibles taking into account non-uniform seawater density profiles
Sizing drop weights for deep diving submersibles taking into account non-uniform seawater density profiles
This technical communication describes a method to size the drop weights used by submersibles for diving and surfacing taking into account varying seawater density profiles. The method allows consistent diving and surfacing performance to be achieved for differently sized submersible and target dive depths. The conditions that need to be met for safe operation of a submersible in this context are described. The equations needed to appropriately ballast a platform and size its diving and surfacing drop weights are derived, highlighting some inherent limitations of using a two drop weight method for certain types of mission. The performance of the proposed approach is demonstrated through numerical simulations for different sized submersibles and target depths. The results show the effects of using different design parameters to illustrate some useful patterns and trends that can assist submersible developers and operators predict the effects of environmental and design uncertainties on important operational parameters such as the time taken for diving and surfacing.
0364-9059
Thornton, Blair
8293beb5-c083-47e3-b5f0-d9c3cee14be9
Thornton, Blair
8293beb5-c083-47e3-b5f0-d9c3cee14be9

Thornton, Blair (2019) Sizing drop weights for deep diving submersibles taking into account non-uniform seawater density profiles. IEEE Journal of Oceanic Engineering. (doi:10.1109/JOE.2019.2898070).

Record type: Article

Abstract

This technical communication describes a method to size the drop weights used by submersibles for diving and surfacing taking into account varying seawater density profiles. The method allows consistent diving and surfacing performance to be achieved for differently sized submersible and target dive depths. The conditions that need to be met for safe operation of a submersible in this context are described. The equations needed to appropriately ballast a platform and size its diving and surfacing drop weights are derived, highlighting some inherent limitations of using a two drop weight method for certain types of mission. The performance of the proposed approach is demonstrated through numerical simulations for different sized submersibles and target depths. The results show the effects of using different design parameters to illustrate some useful patterns and trends that can assist submersible developers and operators predict the effects of environmental and design uncertainties on important operational parameters such as the time taken for diving and surfacing.

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More information

Accepted/In Press date: 1 February 2019
e-pub ahead of print date: 19 March 2019

Identifiers

Local EPrints ID: 429893
URI: http://eprints.soton.ac.uk/id/eprint/429893
ISSN: 0364-9059
PURE UUID: 5ca257c0-25e0-4979-a86f-451fe6b20479

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Date deposited: 08 Apr 2019 16:30
Last modified: 07 Oct 2020 00:01

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