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DTIC ADA410914: Laboratory Modeling of Hydraulic Dredges and Design...
by Defense Technical Information Center
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The deepening and maintenance of the world's ports and
navigable waterways has been an integral part of the
world economy for centuries. In recent years, cutterhead
and draghead hydraulic suction dredges have performed a
majority of the dredging work. The ongoing design and
testing of hydraulic dredges is important for maintaining
efficient dredging operations within the limits set by
increasing environmental regulations. The high cost of
building and operating a hydraulic dredge makes field
testing of full-scale prototypes very expensive and time
consuming. Moreover, the testing conditions are generally
difficult to control, and the natural unpredictability of
the sea can render experimental results inconclusive.
These factors substantiate the need for laboratory model
testing of hydraulic dredging operations. The usefulness
of any hydraulic model depends on the degree of
geometric, kinematic, and dynamic similarity between the
model and its prototype. The primary challenge in
establishing useful similitude criteria for model dredge
studies is proper kinematic scaling of the suction inlet
velocity, average particle settling velocity, dredge
swing velocity, and cutter rotational speed. Despite the
inherent challenges, model studies of hydraulic dredge
equipment have proven useful for obtaining qualitative
results. The new Coastal Engineering Laboratory at Texas
A&M University is equipped with model dredge testing
facilities ideal for performing such experiments. The
tow/dredge carriage has a fully adjustable dredge ladder,
a 14.9 kW (20 hp) cutter drive, and a 2.54 cm (3 in)
dredge pump. A Programmable Logic Controller (PLC)
provides computer numerical control and real-time data
collection and analysis during model dredging operations.
Date Published: 2018-05-12 01:43:48
Identifier: DTIC_ADA410914
Item Size: 259508847
Language: english
Media Type: texts
# Topics
DTIC Archive; Glover, Gordon J ; TEXA...
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