Trimaran Hull Form Development for America's Marine Highways EXPRESS SERVICE Trailership
Author Mizine, Hagesteijn, et al.
Title Trimaran Hull Form Development for America's Marine Highways EXPRESS SERVICE Trailership
Conference/Journal FAST
Month September
Year 2011

Abstract
The paper describes the results of the hull form design of an
innovative High Speed Trimaran Trailership (HSTT) as part
of the fleet of trailerships, capable of carrying about 260 53’
trailers in the speed range of 25 up to 30 knots. The HSTT
design requirements support America’s Marine Highways
(AMH), an evolving national strategy. A commercial
trimaran trailership has been justified for a 1000 nautical
mile ocean route along the U.S. East Coast. This route
would alleviate traffic on Interstate Highway Route I 95.
This type of new express cargo ship could also provide
military mobility capability in many inter and intra theater
Sealift and Sea Base scenarios with a range of up to 9,500
nautical miles. The HSTT also creates a potential for the
Army to lease necessary, flexible and capable ships for their
missions.

The HSTT is an arrangement of proven and innovative
components: Trimaran hull forms; hybrid pod contra
rotation propulsion; hybrid geared diesel/diesel electric
machinery; multihull superstructure and advanced cargo
handling systems. The Trimaran Trailership design is based
on a series of design studies performed under Center for
Commercial Deployment of Transportation Technologies
(CCDOTT) sponsorship in the period of 1999-2009 and
model tests in the Naval Surface Warfare Center Carderock
Division’s David Taylor Model Basin in the 2000-2007 time
frame. The refinement of the HSTT design requires hull
form optimization with follow on resistance and self
propelled model tests, which are conducting at present time
at MARIN.

The hull form optimization presented in this paper involved
the following activities: (1) a systematic investigation of
multi-dimensional design space using first principle
methods; (2) hydrodynamic optimization using a
combination of non-linear free surface potential flow and
boundary layer simulations; (3) a parametric hull model was
used to conduct a formal exploration of the design space.
The work was realized within the FRIENDSHIPFramework
for CAE coupled to SHIPFLOW as the engine
for Computational Fluid Dynamics. In parallel, the
investigation was done with use of the FINE/Marine free
surface RANS calculations.

The paper includes the results of the hull form optimization
and propulsion system selection for this innovative hybrid
concept of HSTT concept. The paper describes the design
aspects and applicability for commercial and sealift
applications.

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