Mid-May
2007
Table
of Contents:
Southwest Section |
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New England Section |
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Greek Section |
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Mid-May
2007
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Southwest
Section February 20, 2007 Practical Aspects of Collecting and Correcting Speed Trial Data for a Class of VLCC Trialed in the Open Ocean On
February 20th the Southwest Section of SNAME conducted their regular monthly
meeting. A brief business meeting was conducted followed by dinner, and
a presentation by Andy Davidson and Rick Ashcroft, both of General Dynamics-NASSCO. The first vessel underwent sea trials in the Eastern Pacific, approximately 60 miles due west of San Diego, in July of 2004. The corrected results were not as expected and the vessel appeared not to make design speed by a significant margin. A number of changes were made to the trials procedure and practice in light of the lead ship trial experience. These changes resulted in the successful demonstration of design speed in the follow ships. The presentation discussed data related to the various environmental influences and data collection system issues experienced during the preparation of the vessel for trials, trial data collection process, and data reduction for the three follow ship trials. The measurement of wind, wave, and current data at the time and place of the trial was presented and discussed. Trials data correction by the ISO 15016 method was presented in some detail and the use of ship motion data from model tests was addressed. Comparison of model test data and corrected trial data for three drafts was presented and aspects of the hydrodynamic performance of the hull form were discussed. Maneuvering
trials were also undertaken on the first and third vessels. Comparisons
between model test, simulation, and trials results were presented and
discussed. March 20, 2007 On March 20th the Southwest Section of SNAME conducted their regular monthly meeting. A brief business meeting was conducted followed by dinner, and a presentation by Jesse Fairchild, of Oldenburg Lake Shore. The presentation covered the design of a prototype Advanced Weapons Elevator (AWE), which is a ropeless elevator powered by linear electric motors. The prototype design has the capability to raise and lower a six-ton payload at a speed of 150 ft./min up and 100 ft./min down. The prototype AWE is designed in accordance with MIL-STD-17807, Shipboard Cargo Weapons Elevators, to the greatest extend possible. A short video, showing the operation of the AWE, was also shown.
April 24, 2007 On April 24th the Southwest Section of SNAME conducted their regular monthly meeting. A brief business meeting was conducted followed by dinner, and a presentation by Dr. Matthew Tedesco. Dr. Tedesco provided a presentation on the feasibility of Short Sea Shipping (SSS) for domestic cargo currently moving by truck on the west coast. The subject matter was built on work that was conducted with funding from the Center for Commercial Deployment of Transportation Technology (CCDOTT) and accomplished with a team of industry experts. The presentation focused on:
New
England Section April 19, 2007 On April 19, 2007, the SNAME New England Section met on the campus of the U.S. Coast Guard Academy for an evening of student design project reviews. Throughout the 2006-2007 academic year, the Naval Architecture and Marine Engineering cadets have been working on their capstone design projects. This year four different design groups developed concept design to meet the mission requirements for the Coast Guard's Offshore Patrol Cutter (OPC). The OPC is one of the vessels in the Integrated Deepwater System (IDS). Each of the OPC design groups were given a slightly different set of requirements, which served as the backdrop for an effective parametric study. Since last August, each group has created a conceptual design which satisfies the mission requirements including: generation of hull form, general arrangements, intact and damaged stability analysis, seakeeping analysis, midship section design, propulsion plant design, model testing, electrical distribution, HVAC design, piping system design, cost analysis, and crewing considerations. All of the design teams created posterboards describing their journeys through the ship concept design process. They were displayed in the lobby of the hall for viewing and discussion while Section members devoured portable food and beverages. One of the design teams then gave an excellent 45-minute presentation on their OPC concept. This team was made up of Cadets 1/C Kyle Carter, 1/C Andrew Gibbons, and 1/C Jack Walsh. Other design teams who withstood our withering and relentless barrage of questions and comments as they manned their posters were: Cadets
1/C Brian Hall Cadets
1/C Chris Greenough
Greek
Section April 26, 2007 On April 26, 2007, 50 people attended the 7th technical meeting of the Greek Section for this season, to hear Dr. Michael (Mike) Kennedy’s, the managing director of the Hellespont Steamship Corporation, most interesting presentation on “Building a tanker - Painting problems and mitigation”. Mike Kennedy gave a short review of tanker coatings inside and out, the problems one will encounter with shipyards and paint suppliers, a short summary of IMO/SOLAS rules. He went over some of the most common problems that can be encountered when painting a tanker, and made suggestions for mitigation via specifications, vendor agreements, and site supervision, including paint fingerprinting. He also went over quality control issues at the shipyard, surface preparation, paint guarantees, performance standards and recent regulatory issues. Examples from Dr. Kennedy’s extensive experience in negotiating with yards and paint vendors were also presented. Overall,
it was a most lively session, in which many questions were asked and left
the audience impressed with the significance of the topic.
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