Dynamics Of Moored Vessel:; Topic At Los Angeles SNAMIE

The first meeting of the 1980- 81 season of the Los Angeles Metropolitan Section of The Society of Naval Architects and Marine Engineers was held aboard the S.S. Princess Louise, berthed in the Port of Los Angeles. Nearly 50 members and guests were in attendance to welcome the new Section officers and participate in the presentation of a paper titled " L o w - F r e q u e n c y Dynamics of Moored Vessels,1' authored by Dr.

B.W. Oppenheim and P.A. Wilson.

The new Section officers are: Edward V. Stewart, chairman of the Section ; George L. Stiehl, vice chairman; and George F. Henning, secretary-treasurer. Past chairman Charles E. Heil was elected to serve on the Executive Committee along with Robert D.

Karl, J. Robert Malone, and Dr.

Maxwell C. Cheung.

In the absence of chairman Stewart, vice chairman Stiehl dispensed with the business portion of the meeting. He then opened t h e t e c h n i c a l s e s s i o n and introduced author and presenter Oppenheim, who described the evening's paper as "presenting several theoretical methods for predicting the low-frequency dynamics of large ships and discs moored in deep waters with multileg mooring systems." Utilizing "Vu-Graphs," Dr. Oppenheim outlined three complete theories of low-frequency d y n a m i c s w h i ch were derived, evaluated, and computerized to support the paper.

The theories, which considered mooring lines of arbitrary composition, were based on non-linear, linear, and static criteria respectively.

The data comprising the paper would be invaluable to all concerned with the safe mooring of platforms in the world oceans. This timely paper was also the subject of Dr. Oppenheim's Ph.D. thesis in ship science at the University of Southampton, England.

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