Time-domain simulation of the maneuvering performance of ships in regular waves and shallow water

Christos Pollalis, Evangelos Boulougouris

Research output: Contribution to conferencePaperpeer-review

6 Downloads (Pure)

Abstract

The IMO's Second Generation of Intact Stability Criteria (SGISC) have brought the manoeuvring performance of ships in waves to the spotlight of the research community. A very interesting case arises when the vessel's manoeuvrability is affected by shallow water as well. As this instance is rather common closer to shore and in the proximity of ports, any degradation of the vessel's ability to execute the commanded manoeuvres may give rise to safety concerns. The authors present herein a novel hybrid methodology that captures such changes in the ship's manoeuvring performance. It accounts for the influence of both the first and second-order wave forces, as well as on the calm water-related contributions. This hybrid seakeeping and manoeuvring methodology has been programmed into the time-domain simulation software ELIGMOS and it is tested with the S-175 container ship, investigating the impact on her turning circle manoeuvres in long regular waves (λ/L=1.0) at a Froude number of 0.15 and various under keel clearance values. The steady drift forces in shallow water have been calculated using a near-field methodology, embedded in the NEWDRIFT 3D-panel code. Using Ankudinov's formulae, the impact of shallow water on the manoeuvring derivatives has been captured. The authors present analytically the results and discuss their findings.
Original languageEnglish
Number of pages10
Publication statusPublished - 4 Jun 2021
Event1st International Conference on the Stability and Safety of Ships and Ocean Vehicles - Online
Duration: 7 Jun 202111 Jun 2021
http://www.stability-and-safety-2021.org/

Conference

Conference1st International Conference on the Stability and Safety of Ships and Ocean Vehicles
Abbreviated titleSTAB&S 2021
Period7/06/2111/06/21
Internet address

Keywords

  • shallow-water waves
  • manoeuvring in waves
  • time-domain simulation
  • turning ability

Fingerprint

Dive into the research topics of 'Time-domain simulation of the maneuvering performance of ships in regular waves and shallow water'. Together they form a unique fingerprint.

Cite this