A STUDY OF THE INFLUENCE OF LIQUID TANKS ON THE EARTHQUAKE RESPONSE OF OFFSHORE PLATFORMS

An investigation of liquid storage tanks effects on the dynamic characteristics of fixed offshore platforms is conducted using random vibration theory. The liquid sloshing is represent by an infinite series of masses, springs and linear dampers. The equivalent mechanical model of sloshing is then combined with a multi degree of freedom lumped mass structural model of an hypotetical 200 meter platform. The effect of sloshing on natural frequencies and mode shapes is evaluated. Changes in system response to earthquake excitation are examined as tanks geometry is varied. The possibility of using liquid storage tanks as dynamic absorbers is also investigated.

  • Corporate Authors:

    Massachusetts Institute of Technology

    Department of Ocean Engineering, 77 Massachusetts Avenue
    Cambridge, MA  USA  02139
  • Authors:
    • Teixeira de Melo, MCS
  • Publication Date: 1979-1-19

Media Info

  • Pagination: 72 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00310834
  • Record Type: Publication
  • Report/Paper Numbers: Thesis
  • Files: TRIS
  • Created Date: May 7 1980 12:00AM