Title page for ETD etd-05202008-220630

Type of Document Master's Thesis
Author Strock, Justin William
Author's Email Address jstrock@vt.edu
URN etd-05202008-220630
Title Methods for Naval Ship Concept Exploration Interfacing Model Center and ASSET with Machinery System Tools
Degree Master of Science
Department Aerospace and Ocean Engineering
Advisory Committee
Advisor Name Title
Brown, Alan J. Committee Chair
McCue-Weil, Leigh S. Committee Member
Neu, Wayne L. Committee Member
  • Model Center
  • Optimization
Date of Defense 2008-04-24
Availability unrestricted
In response to the Fiscal Year 2006 National Defense Authorization Act, the US Navy conducted an evaluation of alternative propulsion methods for surface combatants and amphibious warfare ships. The study looked at current and future propulsion technology and propulsion alternatives for these three sizes of warships. In their analysis they developed 23 ship concepts, only 7 of which were variants of medium size surface combatants (MSC,21,000-26,000 MT). The report to Congress was based on a cost analysis and operational effectiveness analysis of these variants. The conclusions drawn were only based on the ship variants they developed and not on a representative sample of the feasible, non-dominated designs in the design space.

This thesis revisits the Alternative Propulsion Study results for a MSC, which were constrained by the inability of the Navy’s design tools to adequately search the full design space. This thesis will also assess automated methods to improve the APS approach, and examine a range of power generation alternatives using realistic operational profiles and requirements to develop a notional medium surface combatant (CGXBMD). It is essential to base conclusions on the non-dominated design space, and this new approach will use a multi-objective optimization to find non-dominated designs in the specified design space and use new visualization tools to assess the characteristics of these designs. This automated approach and new tools are evaluated in the context of the revisited study.

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