Vibration Damping of Large Containership in Operation

Vibration damping is a paramount factor in understanding vibrations in structures because the response of a structure under stationary dynamic loads, at resonance, is directly (inversely) proportional to the damping. Also, transient response of a structure decays exponentially at a rate determined by the damping factor and eigenfrequency of each mode. Thus, to compute forced responses, the damping must be known. Despite damping thus being of large importance, there is limited knowledge of the damping of ships in general and of large container ships in particular. Some studies have suggested the damping is speed dependent, whereas others have not. In the last ISSC 2018 report, it was concluded that more data are needed from full-scale measurements. In the present paper the dynamics of a large container ship in operation is investigated, from full scale measurements in different operation conditions. State-of-the art, so-called operational modal analysis (OMA) is used for computing the eigenfrequencies, damping factors, and mode shapes of the ship. It is discussed how particularly the vibration damping varies with different operating parameters such as cargo, speed, and sea state.

• Record URL:
  • https://doi.org/10.1007/978-981-15-4672-3_20
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9789811546716
• Supplemental Notes:
  • © Springer Nature Singapore Pte Ltd. 2021.
• Corporate Authors:

  Springer Singapore

  ,    
• Authors:
  • Shakibfar, Saeed
  • Andersen, Ingrid M V
  • Brandt, Anders
• Conference:
  • 14th International Symposium of Practical Design of Ships and Other Floating Structures (PRADS 2019)
  • Location: Yokohama , Japan
  • Date: 2019-9-22 to 2019-9-26
• Publication Date: 2020-10

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 321-329
• Monograph Title: Practical Design of Ships and Other Floating Structures: Proceedings of the 14th International Symposium, PRADS 2019, September 22-26, 2019, Yokohama, Japan- Volume II

Subject/Index Terms

• TRT Terms: Containerships; Damping (Physics); Modal analysis; Ship motion; Ship operations; Vibration control
• Subject Areas: Marine Transportation; Operations and Traffic Management; Vehicles and Equipment;

Filing Info

• Accession Number: 01928413
• Record Type: Publication
• ISBN: 9789811546716
• Files: TRIS
• Created Date: Aug 23 2024 4:53PM