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.
Massachusetts Institute of TechnologyDepartment of Ocean Engineering, 77 Massachusetts Avenue
Cambridge, MA USA 02139
- Teixeira de Melo, MCS
- Publication Date: 1979-1-19
- Pagination: 72 p.
- TRT Terms: Offshore platforms; Sloshing; Stability (Mechanics)
- Old TRIS Terms: Offshore platform stability
- Subject Areas: Bridges and other structures; Marine Transportation; Safety and Human Factors;
- Accession Number: 00310834
- Record Type: Publication
- Report/Paper Numbers: Thesis
- Files: TRIS
- Created Date: May 7 1980 12:00AM