Computational Tools for Early Stage Ship Design ESRDC

Computational Tools for Early Stage Ship Design ESRDC Annual Workshop 2008 Ed Zivi May 20, 2008 1

Howard Fireman NAVSEA (SEA 05 D) NAVAL SHIP DESIGN Conventional vs New Approach Conventional Approach: Point Based Exploration of Design Space - Designs are manually generated - Time-consuming - Few data points - Limited knowledge gained from the few design points New Approach: Systematic Exploration of Design Space - An automated design process. - Systematic exploration of design space - Easily optimized to meet multiple, competing objectives. - Optimization is difficult due to competing performance and economic requirements. 2

Integrated Fight Through Power System “The primary aim of the electric power system design will be for survivability and continuity of the electrical power supply. To ensure continuity of service, consideration shall be given to the number, size and location of generators, switchboards, and to the type of electrical distribution systems to be installed and the suitability for segregating or isolating damaged sections of the system. ” NAVSEA T 9300 -AF-PRO-020 May 20, 2008 3

Quality of Service Definitions May 20, 2008 4

Continuity of Service Definition Survivability Model Survivability Design Handbook for Surface Ships OPNAV P-86 -4 -99 Innovation: Concurrent Dependability May 20, 2008 5

Continuity of Service Terms of Reference Operability: Ability to provide service continuity throughout a specific damage scenario Where represents the scenario; represents the system configuration; , and represent the actual & desired state and relative importance of each service. Dependability: Ability to provide service continuity throughout a distribution of likely damage scenarios May 20, 2008 6

DOD 5000 Acquisition Guidance 4. 7. 1. 2. Extensive use of modeling, simulation, and analysis should be used throughout the acquisition process … l l l Early investments in the acquisition life cycle Verified, validated, and accredited (VV&A) models and simulations with credible applicability. Validation of Modeling & Simulation (M&S) during system testing Simulation Based Design (SBA) / M&S support for: – Test planning; pre-test results prediction – Validation of system interoperability – Supplement design qualification, actual T&E, manufacturing, and operational support l Implement SBA/M&S throughout program development, including: – Engineering, manufacturing, and design trade studies – Developmental, operational May 20, 2008 7

Final Thoughts Scope: l Metric based design space exploration l Quantitative assessment of candidate design(s) Challenges: l Dynamically interdependent stiff systems l Multidisciplinary Navy / Industry / Academic team l Critical decisions are made early in acquisition cycle May 20, 2008 8