An earthquake-compliant offshore platform for use in regions of strong earthquakes is disclosed in which the natural vibrational period of the jacket structure is preferably in the range of about 4 seconds to about 8 seconds, which is between the primary excitation period of earthquake energy and the primary storm wave period. The earthquake-compliant jacket structure is lighter than a conventional steel battered jacket for the same location and conditions and has a constant cross-section. The vibrational period of the earthquake compliant platform can be tuned by altering structural stiffness or mass.
申请公布号
WO9858129(A3)
申请公布日期
1999.03.18
申请号
WO1998US11850
申请日期
1998.06.08
申请人
EXXON PRODUCTION RESEARCH COMPANY
发明人
GLASSCOCK, M., SIDNEY;JONES, JOSH, E.;STEELE, KENNETH, M.