文档介绍：Conceptual Design and Hydrodynamic Analysis of a
High-Speed Sealift Adjustable-Length Trimaran
K. J. Maki (AM), L. J. Doctors (M), R. M. Scher (M), W. M. Wilson (V), S. H. Rhee (AM),
A. W. Troesch (FL), R. F. Beck (FL)
This paper describes a novel adjustable-length trimaran design for service as a high-speed sealift vessel. Different
numerical hydrodynamic tools were exercised to assess the performance of the vessel. An extensive model test program
that included powering and seakeeping experiments was conducted to elucidate utility of the numerical predictions.
KEYWORDS: calmwater resistance; seakeeping; multihull; have not yet converged to a single view. However, several inde-
model testing; thin-ship theory; computational fluid dynamics; pendent visions of the future, paralleled by recent concept stud-
strip theory ies and designs, have included a doubling of transit speed, from
the conventional 20 to 24 knot regime of present sealift ships, to
INTRODUCTION speeds exceeding 40 knots; cargo payloads from several hundred
For ship designers the increasing emphasis on rapid and flex-
to several thousand tons, and stage lengths varying from about
ible support of logistic missions represents several distinct tech-
2500 to about 6000 nautical miles.
nical challenges. Among these, one of the most difficult is the
desire for significantly higher speeds than previous sealift ship Ship length constraints for austere port operations (quite
classes, capable of carrying substantial military payloads over apart from limited acquisition budgets and operating costs) de-
trans-oceanic stage lengths, but without prohibitive increases in mand solutions that differ markedly from the conventional, large,
ship size, power, and fuel consumption (especially in view of re- sealift ship (with whatever increased power, weight saving, and
cent trends in oil price). The need for operational flexibility in variation of form coefficients go with it). While designers stri