Marine Log - June 2008 - (Page 96)
TechTalk BY KEVIN CORBLEY June 2008 Yearbook Vol. 113 No. 6 Speeding structural analysis by integrating FE tools with global 3D modeling esearch indicates that in-service maintenance issues on large marine vessels can be assessed more quickly with detailed finite element (FE) analysis when structural geometry and connectivity data are extracted from global 3D models of the ships. This approach is far more cost-effective than generating localized FE models from scratch. The research was conducted on behalf of the Canadian Navy by Martec Ltd., Halifax, N.S., Canada, a specialist in performing advanced engineering simulations for the analysis of complex structures. According to David Brennan, Martec manager of naval platforms, the new FE methodology makes sense from a practical perspective because global digital 3D models are increasingly being created during the design and construction of new ships. As a result, they are more readily available for use once the ship becomes operational, extending the usefulness of the models through the ship’s life-cycle. “In the future, a 3D model will be one of the deliverables to the Canadian Navy [when a new ship is built,] said Brennan. “This model will start in the preliminary design or concept phase, and the data will continue to evolve through the con- R First of a two-part series “The Project” struction into the in-service support and then into decommissioning.” Bridging the significant gap between FE and global 3D modeling to make life-cycle models a reality ultimately became the objective of the research. To accomplish this, Martec teamed with Intergraph Corp., a Huntsville, Ala., a developer of enterprise, naval and commercial ship design solutions. ASSESSING THE TOOLS The research contract with Defence Research and Development Canada in Dartmouth, Nova Scotia, called for the firm to assess the current status of available software tools that could be used to analyze how structural damage to a ship might impact its operational capabilities. The engineering firm already had several FE analysis tools under development. The damage in question could be the result of corrosion, collision, grounding, weapons blast or normal wear and tear. Although such damage may be found during a routine refit, the Canadian Navy was more concerned with incidents that happen at sea. In these cases, time is of the essence. The objective of the project was to develop methods to quickly determine whether the ship could continue on its mission or needed to return to port for immediate repairs. Martec focused on simulating how localized damage affected the overall strength of a ship. For the research, Martec modified its own suite of FE modeling tools for marine analysis. But first the firm had to create a digital 3D model of a Canadian naval vessel. Technicians simulated various types of vessel damage in a computerized environment and then applied structural strength, hydrodynamic and other analysis algorithms. In an operational mode, the goal would be to provide the ship’s captain with a detailed assessment of the situation within a matter of hours. The five-year research project yielded both good and bad news, according to Michael Lichodzijewski, Martec senior software engineer. Next month: “The Results” MARINELOG ISSN 08970491 A Simmons-Boardman Publication 345 Hudson Street, New York, N.Y. 10014 Tel: (212) 620-7200 Fax: (212) 633-1165 Website: http://www.marinelog.com Advertising Sales UNITED STATES New York Sales Office 345 Hudson St., 12th floor New York, NY 10014 Roland Espinosa Sales Director Tel (212) 620-7225 Fax (212) 633-1165 E-mail: firstname.lastname@example.org U.S. GULF COAST Jeff Sutley Tel (212) 620-7233 Fax (212) 633-1165 E-mail: email@example.com WORLDWIDE Europe Representative Donna Edwards, International Sales Manager e-mail: firstname.lastname@example.org Marine Log (UK) Hillreed House, 54 Queen Street, Horsham, West Sussex RH13 5AD UK Tel: +44 1403 275935 Fax: +44 1403 260633 Australia, China, India, Japan, New Zealand and Singapore Representative Susan Pulman Tel.+44 1403 260110 Fax. +44 1403 260633 e-mail: email@example.com Korea Young-Seoh Chinn JES Media International 2nd Fl. ANA Bldg. 257-1, Myungil Dong, Kangdong-Gu Seoul 134-070, Korea Tel: +822-481-3411 Fax: +822-481-3414 e-mail: firstname.lastname@example.org CLASSIFIED SALES Diane Okon Classified Advertising Sales 20 South Clark St., Suite 2450 Chicago, IL 60603 Tel: (312) 683-5022 Fax: (312) 683-0131 E-mail: email@example.com USPS 576-910 96 MARINE LOG JUNE 2008 YEARBOOK www.marinelog.com
Table of Contents for the Digital Edition of Marine Log - June 2008
Marine Log - June 2008
Innovation Needed to Meet Crew Shortage
Optimism Abounds Despite Slowing Economy
Can Shipping's Shopaholics Keep Up the Buying Binge?
Can Congress Keep Navy Shipbuilding Off the Rocks?
Fitting the Ultra-deepwater Pieces Together
Higher Demand, Higher Prices
Demand Up For Large Combination Vessels
The Dirty Truth About Emissions
SSAS: Realizing Its Potential
Fuel Saving Technology
Marine Log - June 2008