Comparison of Hydrodynamic Coefficients obtained through Implementation of Diverse Methods in Square Tank

다국어 초록 (Multilingual Abstract)

To confirm whether the square tank at Changwon National University (CWNU) can be used for estimation of maneuverability, planar motion mechanism (PMM) test and circular motion (CM) test were performed for various conditions. PMM test can be implemented using an XY carriage and a yaw table in the square tank. However, sometimes test section is insufficient for PMM test owing to low length-breadth ratio of the tank. In addition, the speed of a towing carriage is also quite limited. Therefore, it would be useful if PMM test could be effectively performed diagonally, by establishing coupled control logic to drive three servomotors. In addition, Froude number dependency on the estimated hydrodynamic coefficients was checked. Furthermore, CM tests, which cannot be completed in a conventional linear towing tank, were performed, and its results were compared with the results of PMM test. The results of the PMM tests in the diagonal direction were consistent with the results of the test performed in the direction parallel to the sidewall. However, the results of the CM test were greater than those of the PMM test. This tendency was also observed in the results published at Ulsan University

참고문헌 (Reference)

1 신현경, "구속모형시험을 이용한 KCS 선형의 조종성능 추정" 대한조선학회 48 (48): 465-472, 2011

2 "SIMMAN"

3 Tajima, S. I., "Measurements of Hydrodynamic Forces Acting on Planing Hull at High-Speed by Planar Motion Mechanism Test" (232) : 71-75, 1999

4 김연규, "KCS 선형의 4자유도 조종성능 추정" 대한조선학회 48 (48): 267-274, 2011

5 Yoon, H. K., "Investigation on the Depth Effect of Hydrodynamic Coefficients Obtained by PMM Test in Square Tank" 2013

6 신현경, "Circular Motion Test를 이용한 선박의 조종성능 추정에 관한 연구" 대한조선학회 46 (46): 259-267, 2009

7 김연규, "CPMC 구속모형시험에 의한 KCS 선형의 조종성능 추정" 대한조선학회 46 (46): 553-561, 2009

8 Kim, D. J., "A study on the running attitude and dynamic stability of a semi-displacement round bilge vessel at high speed" Seoul National University 2012