Efficiency of Hydraulic Damping Devices for Minimization of Platform Rolling and Pitching in Rough Sea Conditions

When floating platforms are used in the regions of freezing seas anchor mooring systems should be stiffer (to prevent significant moving of the platform affected by ice loads) that causes platform rolling and pitching at frequencies close to resonance with waves. The resonance effects may be eliminated by means of various methods. One of the effective methods is to equip a platform with hydraulic vibration dampers, which will increase resistance of a platform flow in natural (viscous) fluid and remove the platform rolling and pitching from the risk area. It is proposed to use more simple mathematical models where fluid viscosity is considered by introducing resistance factors obtained from the design models considering actual, i.e. viscous, fluid properties. This paper describes such approach. Mathematical modelling of damper motion in viscous fluid was carried out and the resistance factors were calculated for dampers of various configurations. Comparative analysis of the facilities behaviour using hydraulic dampers of various configurations both in ideal fluid and considering its viscosity was carried out. The paper demonstrates efficiency of the proposed approach, effect of which has been proven during the platform building practice.

• Record URL:
  • http://www.poac.com/Papers/POAC07_V1.zip
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9787561136317
• Supplemental Notes:
  • Abstract reprinted with permission of the International Conference on Port and Ocean Engineering Under Arctic Conditions (POAC).
• Corporate Authors:

  Port and Ocean Engineering under Arctic Conditions (POAC)

  ,    

  Dalian University of Technology Press

  Dalian,   China 
• Authors:
  • Toropov, E E
  • Gintovt, A R
  • Bolshev, A S
  • Litonov, O E
• Conference:
  • 19th International Conference on Port and Ocean Engineering under Arctic Conditions (POAC'07)
  • Location: Dalian , China
  • Date: 2007-6-27 to 2007-6-30
• Publication Date: 2007

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 131-141
• Monograph Title: POAC '07: Proceedings of the 19th International Conference on Port and Ocean Engineering under Arctic Conditions
• Serial:
  • Proceedings of the International Conference on Port and Ocean Engineering Under Arctic Conditions
  • Publisher: Port and Ocean Engineering under Arctic Conditions (POAC)
  • ISSN: 0376-6756
  • EISSN: 2077-7841
  • Serial URL: http://www.poac.com/PapersOnline.html

Subject/Index Terms

• TRT Terms: Dampers; Floating structures; Frigid regions; Mathematical models; Mooring anchors; Offshore platforms; Pitch (Dynamics); Resonance; Rolling
• Subject Areas: Marine Transportation; Terminals and Facilities; I21: Planning of Transport Infrastructure;

Filing Info

• Accession Number: 01560589
• Record Type: Publication
• ISBN: 9787561136317
• Files: TRIS
• Created Date: Apr 17 2015 1:56PM