NEHRP Clearinghouse
- Title
- Dynamic Analysis of Tension-Leg Platforms.
- File
- PB83100982.pdf
- Author(s)
- Morgan, J. R.; Malaeb, D.
- Source
- National Science Foundation, Washington, DC., January 1982, 132 p.
- Abstract
- A deterministic approach for the dynamic analysis of tension-leg platforms subjected to wave forces and ground motion is described. A mathematical model is developed based on a set of coupled nonlinear differential equations for sway, surge, heave, pitch, roll, and yaw motions. A time domain analysis is selected for investigating the dynamic characteristics of the anchored structure. The time domain analysis model is capable of obtaining time histories of displacement response in the direction of all degrees of freedom when the platform is subjected to wave loading and/or ground motion. It can also obtain response spectra for all degrees of freedom, the effects of variations in several parameters, and response to dynamic loading. Several enhancements, including the use of higher wave theories and random sea states would allow the model to be applied to a wider range of problems.
- Keywords
- Offshore structures; Mathematical models; Dynamic response; Ground motion; Earthquake engineering; Ocean waves; Sea states; Earthquakes; Dynamic structural analysis