Fundamentals Ofna Val Surface Ship Weight Estima Ting

Naval ship design is a complex, iterative decision‐making process that requires not only qualitative reasoning and quantitative computations, but also effective handling of massive amounts of information. The development of a systematic procedure in the form of an interactive Decision Support System (DSS) incorporating artificial intelligence (AI) techniques can assist in improving the design process. The DSS reported in this paper integrates conventional naval ship design application software with an expert system. Modeling techniques such as a spreadsheet, a database management system, and graphic display capability are incorporated as well. This DSS facilitates “what‐if” analysis of design problems and assessment of the trade‐offs between performance and cost. The DSS will aid rapid generation of design alternatives and facilitate their evaluation. A final recommendation is made based on multiattribute decision analysis using the straightforward points allocation method and the analytic hierarchy process. During a typical consultation process, the user is prompted for inputs to the naval ship design process and is provided with a wide range of reports in graphical and numerical form. During a structured system evaluation, the DSS displayed considerable accuracy, flexibility, speed, user‐friendliness, and cost‐effectiveness. The reliability and validity of the system were also confirmed. These evaluation procedures provide a replicable methodology for verification and validation of this type of AI‐based decision support system.

Section: Weight Analysismentioning

confidence: 99%

An AI‐based Decision Support System for Naval Ship Design

Chou

Benjamin

1992

“…The DDG-51 was used as a model for the detailed weight and VCG data. The parametric equations the computer program used are comparable to those identified in References [4] and [5].…”

Section: Light Ship Weights and Vertical Centers Of Gravitymentioning

confidence: 99%

An Air‐Capable Combatant For the 21st Century

Kehoe

Brower

Meier

1990

During the next decade, the force structure of the U.S. Navy will be in flux, as it reacts to changing political relationships, advancing technology, and declining resources. Newly developed vertical takeoff and landing (VTOL) aircraft, such as the V‐22 Osprey and AV‐8B Harrier, offer the U.S. Navy an air capability for its future battle force combatants that needs to be explored. What would a battle force combatant with a detachment of six VTOL aircraft and a destroyer combat suite like the ODG‐51's resemble? Can such a ship be designed within reasonable size and cost limits? We conducted a feasibility design study of alternative concepts to determine the smallest, minimum cost, lowest risk, air‐capable battle force combatant capable of conducting operations in the 21st century. The paper discusses the evolution of the design, including alternative ship, hangar, and elevator configurations. It also describes the development of the light ship weights and vertical centers of gravity, deck area and volume, electrical power, and hull form. In addition, the paper covers the process we used to develop the design, including the use of advanced technologies, such as integrated electric propulsion.

“…If inferiority/superiority curve data can be provided for one style of hull form at various drafts, the computer program can interpolate to find the correct values for any draft. weights and vertical centers of gravity are calculated using parametric algorithms [8]. In order to conduct trade off studies during the feasibility design phase, weight and center of gravity data are calculated to the maximum extent possible at the three digit level of detail using parametric algorithms [8].…”

Section: Prismatic Coefficients (Cp) Maximum Section Coefficient (Cx)mentioning

confidence: 99%

“…weights and vertical centers of gravity are calculated using parametric algorithms [8]. In order to conduct trade off studies during the feasibility design phase, weight and center of gravity data are calculated to the maximum extent possible at the three digit level of detail using parametric algorithms [8]. In order to conduct tradeclassification system.…”

Section: Prismatic Coefficients (Cp) Maximum Section Coefficient (Cx)mentioning

confidence: 99%

Ship Design Computer Programs —An Interpolative Technique

Brower

Walker

1986

Naval ship design synthesis computer programs, the original development of which was pioneered by the U.S. Navy, are now used by the U.S. Navy to conduct feasibility design studies and to conduct reverse engineering analyses of foreign ships. The use of these computer programs has substantially reduced the time and cost of conducting feasibility design trade‐off studies and has allowed the ship designer to develop very accurate design solutions that can be effectively used as the basis for preliminary and contract design. The paper describes an interpolative technique for ship design which the authors have developed and incorporated in a variety of ship design synthesis computer programs, without any loss in the accuracy of the design solution. The interpolative technique short cuts the classic and time consuming design spiral approach to conducting ship design studies, which was incorporated in the original ship design computer programs. The interpolative technique also significantly reduces computer operating costs and provides the ship designer with the flexibility required to quickly study the performance and cost impact of using any number of innovative ship configurations. The paper describes programming techniques and ship design logic which allow a ship design computer program to be used to study the impact of using alternative ship design criteria and practices, including different types of hull forms and stability criteria. Also discussed are alternative ways that ship design parametric data can be developed for use in a ship design synthesis computer program. An example of a ship design study which was conducted using the interpolative technique is shown.