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SNAME Spring Meeting— (continued from page 12) SESSION T6 —May 26, A.M.— Offshore Mobile Platforms T6-1 "Downtime Evaluation for Operations from Floating Vessels in Waves" by B.G. Burke. SYNOPSIS — Methods are de- scribed for evaluating downtime for a variety of in-ocean oper- ations from floating vessels in waves. Downtime estimates are determined from the motion char- acteristics of the vessel in waves, an evaluation of motion para- meters and limits directly asso- ciated with operations to be per- formed, and wave conditions to be encountered. Results provide quantitative measures for evalu- ating feasibility of operations, relative benefits of alternative vessels, and the effectiveness of special equipment and procedures for increasing operating time. T6-2 "Time Domain Simulation of Semisubmersible Platform Mo- tion with Application to the Ten- sion-Leg Platform" by J.R. Paul- ling Jr. SYNOPSIS — A numerical time- domain solution of the equations of motion for a floating semisub- mersible stable platform offers the possibility of more accurate estimates of vessel motion re- sponse in severe sea conditions than are possible by the linear frequency domain technique. Some example calculations are de- scribed in which the technique is applied to the analysis of motions and anchoring forces for a ten- sion-leg stable platform. T6-3 "Theoretical Analysis of Single-Point Mooring Behavior" by D.G. Owen and B.T. Linfoot. SYNOPSIS — The detailed devel- opment of mathematical models for determining the dynamic be- havior of single-point mooring in- stallations is discussed. Computer results obtained with a simplified five-degree of freedom mathemat- ical model of a single-point moor- ing system showing the correla- tion that is established by the results of a limited physical model testing program are presented. T6-4 "Design Considerations of the U.S. Nuclear Regulatory Com- mission for the Construction of Nuclear Power Generating Sta- tions in the Ocean" by R.A. Birkel and R.J. Bosnak. SYNOPSIS — Introductory mate- rial describing a typical land- based nuclear powerplant is fol- lowed by a discussion of the current projects now under re- view by the Nuclear Regulatory Commission bearing on the use of nuclear power generating plants in the ocean. Design veri- fication through scale model test- ing and analytical modeling for ocean applications of nuclear pow- er generating plants is discussed. The current NRC position on the respective role of scale model test- ing and analytical modeling is presented. SESSION T7 —May 26, P.M.— Ocean Thermal Energy Conver- sion (OTEC) T7-1 "Theoretical Evaluation of the Seakeeping Performance of Five Candidate OTEC Platforms" by R.A. Barr and J.F. O'Dea. SYNOPSIS — A Theoretical ap- proach is presented and applied to five platform types—ship, sub- marine, vertical column stabilized semisubmersible, disc and axi- symmetric spar. Motions and cold water pipe bending moment dis- tributions are investigated. T7-2 "Studies of Biofouling in OTEC Plants" by F.C. Munch- meyer, J.G. Fetkovich, G.N. Gran- nemann, L.M. Mahalingam and D.L. Meier. SYNOPSIS—An experiment pro- gram leading to an understanding of the effects of biofouling on the heat transfer characteristics of tubes in an ocean environment is presented in detail. The test ap- paratus is described, thermody- namic equations are given, initial laboratory tests and preliminary data from in-situ operational test- ing are discussed. T7-3 "The Ocean Food and En- ergy. Farm Project" by H.A. Wilcox. SYNOPSIS — A project is de- scribed which will supply all the food, energy and petrochemical- like material requirements for a small city. Giant kelp farms in the ocean using nutrient-rich deep waters brought to the warm surface are thoroughly reviewed A New Class of Towboats... And we build them the way they used to be built, with emphasis on quality. This new class of towboats. available in a range of 2600 to 4200 H.P.. was completely designed, engineered, and con- structed at Hillman's Brownsville. Pa. shipyard. The tow- boats feature an impressive combination of rugged con- struction. efficient propulsion and low operating costs. For further information write o<- call: BARGE & CONSTRUCTION COMPANY Brownsville, Pa. 15417 (412) 785-6100 14 Maritime Reporter/Engineering News
