scholarly journals Research and Application on Mathematical Model of Ship Manoeuvring Motion under Shallow water effect

2021 ◽  
Vol 643 ◽  
pp. 012127
Author(s):  
Tao Ran ◽  
Sichen Tong ◽  
Yun Yang ◽  
Huan Zhang
Keyword(s):  
Mathematical Model ◽  
Shallow Water ◽  
Water Effect ◽  
Ship Manoeuvring ◽  
Shallow Water Effect

scholarly journals Validation of Ship Manoeuvring in Shallow Water Through Free-Running Tests

2015 ◽  
Author(s):  
Katrien Eloot ◽  
Guillaume Delefortrie ◽  
Marc Vantorre ◽  
Frans Quadvlieg
Keyword(s):  
Mathematical Model ◽  
Numerical Methods ◽  
Mathematical Models ◽  
Shallow Water ◽  
Model Tests ◽  
Water Effect ◽  
Ship Manoeuvring ◽  
International Collaborations ◽  
Free Running ◽  
Shallow Water Effect

The shallow water effect on ship manoeuvring cannot be neglected. Most sea-going ships become more course stable when they sail from deep to (very) shallow water. International collaborations such as SIMMAN intend to grade up the knowledge on ship manoeuvring prediction through model tests and system based and numerical methods. Free-running model tests executed with the very large crude carrier KVLCC2 at two laboratories have been compared with the results of simulated turning circles and zigzag manoeuvres from two different mathematical models. It was concluded that the type of mathematical model has an important influence on the simulated behaviour. Moreover, further research is necessary as simulations result into a more course stable behaviour compared to free-running tests at model scale.

Experimental Investigation of Trimaran Models in Shallow Water

2014 ◽  
Vol 30 (02) ◽  
pp. 66-78
Author(s):  
Mark Pavkov ◽  
Morabito Morabitob
Keyword(s):  
Shallow Water ◽  
Water Depth ◽  
Critical Speed ◽  
Water Effect ◽  
Finite Water Depth ◽  
Speed Regime ◽  
Displacement Speed ◽  
Littoral Combat Ship ◽  
Shallow Water Effect ◽  
The U.S

Experiments were conducted at the U.S. Naval Academy's Hydromechanics Laboratory to determine the effect of finite water depth on the resistance, heave, and trim of two different trimaran models. The models were tested at the same length to water depth ratios over a range of Froude numbers in the displacement speed regime. The models were also towed in deep water for comparison. Additionally, the side hulls were adjusted to two different longitudinal positions to investigate possible differences resulting from position. Near critical speed, a large increase in resistance and sinkage was observed, consistent with observations of conventional displacement hulls. The data from the two models are scaled up to a notional 125-m length to illustrate the effects that would be observed for actual ships similar in size to the U.S. Navy's Independence Class Littoral Combat Ship. Faired plots are developed to allow for rapid estimation of shallow water effect on trimaran resistance and under keel clearance. An example is provided.

scholarly journals Confirmation of shallow water effect in swimming pool

2004 ◽  
Vol 7 (1) ◽  
pp. 59-65
Author(s):  
Tokuzo FUKAMACHI ◽  
Tetsuo KAWASE ◽  
Yoshiaki TSUKADA
Keyword(s):  
Shallow Water ◽  
Swimming Pool ◽  
Water Effect ◽  
Shallow Water Effect

scholarly journals On the shallow water effect

1952 ◽  
Vol 1952 (84) ◽  
pp. 1-15
Author(s):  
Hajime Maruo
Keyword(s):  
Shallow Water ◽  
Water Effect ◽  
Shallow Water Effect

scholarly journals Ship mooring to jetties under the crosscurrent

Transport ◽  
2017 ◽  
Vol 33 (2) ◽  
pp. 454-460
Author(s):  
Vytautas Paulauskas ◽  
Donatas Paulauskas ◽  
Birutė Plačienė ◽  
Raimondas Barzdžiukas
Keyword(s):  
Shallow Water ◽  
Wind Waves ◽  
Water Effect ◽  
Shallow Water Effect ◽  
Theoretical Results

Quay walls or jetties in some ports or certain places of the ports are located in such a way that currents act at a particular angle to quay walls or jetties. Additional forces created by currents on mooring or moored ships as well as other forces produced by the wind, waves or shallow water effect should be taken in account when designing quay walls or jetties for ship mooring operations. The article describes ship mooring under crosscurrent conditions, calculates mooring methodology, experimentally examines the received theoretical results and provides recommendations to designers and ship operators when quay walls or jetties are arranged at a particular angle to the current.

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