The paper presents the theoretical background to a study of the dynamic effects experienced by cranes on offshore platforms. The study was initiated to review cranes operating in Bass Strait, Australia. A simplified dynamic model of a luffing crane has been used to derive the magnitude of the dynamic factor which occurs when a load undergoing sinusoidal motion is lifted. A theoretical idealisation of a crane was established to determine stiffness. Calculated values of crane stiffness are presented to show the influence of crane properties and operating radius. Dynamic factors for six different cranes are given, showing the influence of wave conditions, geometry and reeving of the hoist system. Overturning moments occurring on the slewing ring are considered in relation to their original design values.

Media Info

  • Pagination: p. 565-576

Subject/Index Terms

Filing Info

  • Accession Number: 00138223
  • Record Type: Publication
  • Source Agency: Offshore Technology Conference
  • Report/Paper Numbers: V2, OTC 2578 Proceeding
  • Files: TRIS
  • Created Date: Aug 23 1976 12:00AM