Mid-May
2005
Table
of Contents:
Chesapeake Section |
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Pacific Northwest Section |
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Philadelphia Section |
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Greek Section |
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Mid-May
2005
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Chesapeake
Section March 16, 2005 Small Boat Training Simulator for Surf Zone On March 16th , over thirty members and guests attended a SNAME Chesapeake Section dinner meeting held at the Washington Navy Yard that featured a paper entitled “Development of a Prototype Small Boat Operator Trainer for the USCG.” The paper was presented by Eugene R. Miller and Brett W. Fox of Computer Sciences Corporation (CSC). As an added bonus, the presenters set up a fully working prototype of the portable boat-handling simulator in the meeting room that consisted of three 50” monitors and a full size helm. This allowed those in attendance to gain hands-on experience with the capabilities of the simulator both before and after the presentation.
The simulator’s development focused on a system that could fit into a typical classroom as opposed to developing something that would require its own dedicated room. Although the working prototype available at the meeting was set up to provide 180 degrees of visibility, the final system would be configured to provide for full 360 degrees of view. The simulator was developed by a team consisting of CSC, Neptune Sciences, and Ship Motions Associates. The prototype development is being performed for the U.S. Coast Guard (USCG). The primary purpose of the simulator is to assist in the training of boat operators in terms of boat handling and mission specific capabilities for two smaller size USCG boats. The training simulator realistically replicates boat response over a full range of operating speeds, in harbor maneuvering and mooring operations for both boats in a wide range of sea conditions -- including the 25 ft Response Boat – Small (RB-S) and, in addition for the 47 ft Motor Life Boat (MLB), operation in heavy seas and surf.
For boat response modeling, the behavior of the boat’s engines and controls were realistically reproduced, while also achieving an acceptable accuracy of the boat’s response model to waves using a six-degree of freedom. A considerable and unique effort is being expended in developing the breaking waves and surf modeling as well as incorporating the effects of local bathymetry (bottom shape) and currents. For visualization of breaking waves, wave geometry was rendered based on time history lookup data, with a special particle animation applied in the region of breaking waves. A very dense wave grid mesh (up to 10,000 elements) was applied to ensure fine detail in the region around the main viewpoint focus.
April 20, 2005 ASNE/SNAME
Joint Meeting On April 20th, nearly fifty members, students and guests attended a SNAME Chesapeake Section dinner meeting held at the Washington Navy Yard that featured presentations by students from the Virginia Tech SNAME/ASNE Student Section and the U.S. Naval Academy ASNE/SNAME Student Section. The Virginia Tech students made presentations of two design projects, each of which consisted of two design teams. The first involved an Advanced Logistics Delivery Vehicle, which is a military vessel that is to be integrated into a safe and efficient logistics chain from the sea-base or logistics support ship to maneuvering troops ashore. Based on a mission statement including general requirements, concept designs were evaluated. Each team developed variants of one concept design and described the choices made in the design. The second presentation involved a Littoral Warfare Submarine, which was to be a small, non-nuclear submarine capable of special forces delivery and removal, mine countermeasures, AUV support, and multiple mission packages. A similar approach was involved in which two teams – Team ATLAS and Team SCRAP – each developed one variant from the concept design phase. All teams have further work to do.
Midshipman Seth Krueger of the U.S. Naval Academy gave a presentation of his project: “Developing a Safe and Efficient Surface Maneuvering Envelope for Submarines.” He framed the problem, presented model test results, and proposed operating envelopes for surface submarine operations.
The attendees were very impressed by the professionalism of the presentations and the quality of the work that was done.
Pacific
Northwest Section April 19, 2005 The April technical meeting took place on Friday, April 8, 2005, in Portland, OR. It was attended by 19 members and guests. The meeting began at 3:30 p.m. at the facilities of Diversified Marine Inc. (DMI) on the Columbia River, where a tour was led by DMI’s president, Mr. Kurt Redd, and yard manager, Mr. Greg Hohler. They explained the strategy and techniques employed by DMI in several recent new construction projects. Members also toured DMI Hull #18, the M/V Lulapin, a 78' x 32', 3600 hp, twin Z-drive tug for Brusco Tug & Barge under construction on DMI’s floating drydock. Mr. Redd explained that all structural steel parts were NC cut by the steel suppliers and delivered as needed. The hull was fabricated in three separate modules that were lifted by DMI’s floating crane and joined on the dock. With the exception of the electrical system, all construction and outfitting work were done by DMI personnel. Detail engineering was performed by the vessel’s designer, Robert Allan Ltd.
The meeting continued at 6 p.m. with a dinner at the nearby Red Lion restaurant on the River, followed by a presentation on “Production Engineering in Small Shipyards,” by SNAME member Jim Hyslop, project naval architect at Robert Allan Ltd. Mr. Hyslop reviewed the production engineering aspects of the design and construction of tugs at compact shipyards such as DMI. With improvements in computer software, off-site development of detail design and construction support has become more cost effective. The turnaround time for such effort has also shortened significantly in the past decade. This has created the trend whereby the naval architect that developed the contract design is subsequently engaged by the shipyard for detailed engineering and construction support. The level of detail of the construction information has to be worked out between the shipyard and the naval architect. The contractual relationship between the owner, naval architect and shipyard also has to be adjusted to suit the new environment. Some examples of structural parts and assembly drawings were included in the presentation, as well as drawings showing piping and electrical cable routing.
The presentation was followed by lively discussions among the members. Discussion lasted about twice as long as the presentation, as the subject was of interest to many in attendance.
Philadelphia
Section April 20, 2005 On Wednesday April 20, 2005, the Philadelphia Section presented “A New Look at Materials and Methods for Shipboard Noise and Vibration Control” by Rick Holub, Senior Director, Marketing and Sales Service and Business Development for Defense, Industrial, OEM Markets The evening's presentation addressed shipboard noise and vibration control, with focus on efficient vibration damping composite treatments for Navy ships, yachts and production boats. Discussion included how application of composites developed for Navy vessels can be combined with diagnostic and predictive techniques perfected for the aircraft and heavy truck industries to optimize treatment weight and minimize installed cost (techniques include sound pressure, acoustic intensity, SEA [Structural Energy Analysis], structural composite analysis and SQ [Sound Quality]). Also discussed, was a new class of sound absorption treatments for engine rooms and other wet areas, which are highly effective for sound control, but extremely moisture resistant. Mr. Dave Gries from Aearo Company's E-A-R Specialty Composites division conducted a demonstration of Aearo's E-A-R® hearing protection devices and Peltor® communications headset ear muffs.
April 21, 2005 On
April 21st, 2005 the sixth technical meeting of the Greek Section for
2004-2005 was held at the presence of more than 30 members and students,
during which Mr. John Couyou ISM/ISO/ISPS Auditor of Bureau Veritas in
Piraeus presented his paper on "Security Compliance and State
Control" with
respect to the ISPS Code and its requirements. All Contracting Governments
to the International Convention SOLAS, 1974, have the right to control
ships entering their ports regarding compliance with the ISPS Code on
both Safety and Security matters. In this lecture, the security documents
that ships are required to carry onboard were presented along with an
overview of the topics that may be covered during a boarding procedure
by port state control officers checking security issues. Evidence that
may lead to the establishment of clear grounds of suspicion that the ship
does not comply with the security requirements was discussed. Control
measures to be imposed upon noncompliance were addressed as well as safeguards
that the ISPS Code allows for so that port states refrain from abusing
control measures.
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