Planar motion mechanism tests and full-scale steering and manoeuvring predictions for a Mariner class vessel

1965 ◽  
Vol 12 (129) ◽  
pp. 201-224 ◽  
Author(s):  
M.S. Chislett ◽  
J. Strom-Tejsen
Keyword(s):  
Full Scale ◽  
Planar Motion ◽  
Motion Mechanism ◽  
Planar Motion Mechanism

A compact motion controller-based planar motion mechanism for captive manoeuvring tests

2021 ◽  
Vol 220 ◽  
pp. 108195
Author(s):  
M. Cansın Özden ◽  
Sertaç Kurdoğlu ◽  
Ersin Demir ◽  
Kadir Sarıöz ◽  
Ömer Gören
Keyword(s):  
Planar Motion ◽  
Motion Controller ◽  
Motion Mechanism ◽  
Planar Motion Mechanism

Benchmark Study and Uncertainty Assessment of Planar Motion Mechanism Tests on KVLCC2 in a Circulating Water Channel

2021 ◽  
Author(s):  
Chengqian Ma ◽  
Ning Ma ◽  
Xiechong Gu
Keyword(s):  
Uncertainty Analysis ◽  
Water Channel ◽  
Planar Motion ◽  
Acquisition Time ◽  
Motion Mechanism ◽  
Towing Tank ◽  
Circulating Water ◽  
Benchmark Study ◽  
Hydrodynamic Derivatives ◽  
Planar Motion Mechanism

Abstract The benchmark experiment research for the maneuverability of a small-scaled ship model is critical for investigating the scaled effect on the maneuvering hydrodynamic derivatives, and validating the CFD technology. Till now, there is little research on the benchmark study and uncertainty analysis for the small-scaled ship which is frequently used in the Circulating Water Channel (CWC). Therefore, an experimental study of the planar motion mechanism (PMM) tests is performed in the CWC of the SJTU. The PMM tests performed in the CWC can avoid some disadvantages of those in the towing tank, such as the limitations on the acquisition time and frequency due to the size of the towing tank, interference of the carriage on the signal acquisition. In addition, the flow field visualization for the tests in the CWC is easier to achieve compared with the experiments in the towing tank, which helps the scholars to understand the characteristic of the wake field during maneuvers. The benchmark ship is the KVLCC2 with a scaled ratio of 1/128.77. The hull forces are recorded and processed to obtain the maneuvering hydrodynamic derivatives. To assess the quality of the acquired data, randomness analysis, stationarity analysis, normality analysis, and statistical convergence are performed for the PMM tests in the CWC for the first time. Finally, the uncertainty analysis (UA) method for the PMM tests performed in the CWC is also developed.

Prediction of Warship Manoeuvring Coefficients using CFD

2015 ◽  
Author(s):  
C. Oldfield ◽  
M. Moradi Larmaei ◽  
A. Kendrick ◽  
K. McTaggart
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Physical Model ◽  
Test Data ◽  
Model Test ◽  
Verification And Validation ◽  
Planar Motion ◽  
Physical Model Test ◽  
Motion Mechanism ◽  
Planar Motion Mechanism

Verification and validation has been completed for the use of computational fluid dynamics as a practical means of simulating captive manoeuvring model tests. Verification includes spatial and temporal refinement studies. Direct validation includes the comparison of individual steady drift and planar motion mechanism simulations to physical model test data. Rotating arm simulations are validated indirectly on the basis of manoeuvring derivatives developed from the PMM tests. The merits of steady and unsteady simulations are discussed.

Paper 12. A Brief Description of the Hya Large Amplitude Pmm System

1972 ◽  
Vol 14 (7) ◽  
pp. 80-84 ◽  
Author(s):  
M. S. Chislett ◽  
L. Wagner Smitt
Keyword(s):  
Large Amplitude ◽  
Force Measurement ◽  
Planar Motion ◽  
Motion Generation ◽  
Motion Mechanism ◽  
Planar Motion Mechanism

This paper gives a brief description of the HyA large amplitude horizontal Planar Motion Mechanism system. The mechanical layout and force measurement arrangements are described, and motion generation capabilities are specified.

Paper 25. Course Stability While Stopping

1972 ◽  
Vol 14 (7) ◽  
pp. 181-185
Author(s):  
L. Wagner Smitt ◽  
M. S. Chislett
Keyword(s):  
Large Amplitude ◽  
Model Tests ◽  
Planar Motion ◽  
Motion Mechanism ◽  
Side Force ◽  
Test Programme ◽  
Course Stability ◽  
Captive Model Tests ◽  
Planar Motion Mechanism

This paper contains the results of captive model tests with an 8-m model of a 190 000 d.w.t. tanker. The tests were made with HyA's new large amplitude Planar Motion Mechanism and the test programme was designed to provide information on the influence of speed and propeller revolutions on the course stability of the vessel. The rudder effectiveness and the side force and turning moment induced by the propeller at full astern revolutions were also measured.

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