A Review and Prospect for Dynamic Load and Stability Check Method for Dual Derrick

The article introduces the dynamic characteristics researches for dual derrick, they are wind load response analysis, the vibration characteristics analysis, seismic response analysis and wave load analysis. On the stability of the dual derrick check, the article recommends the nonlinear finite element method and the treatment of boundary conditions. Although these studies have a certain guiding significance for the practical engineering, but there is a relative lack of the study for the dual derrick on deep-water drilling rigs. To this end, the article points out research contents for the further study of dual derrick dynamic characteristics, proposes the idea that using the reliability analysis theory of large truss structure to research the reliability of the double derrick.