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Nonlinear dynamic analysis of deep water risers |
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| Authors: | VHachemi Safai |
| Institution: | Research Department, Centre Technique Industriel de la Construction Metallique, 20, rue Jean Jaurès, 92807, Puteaux, France |
| Abstract: | The paper presents a theoretical and numerical approach to the dynamical behaviour of risers in deep water which takes into account two types of nonlinearity; that due to viscous drag forces and that due to the large displacements of the riser when submitted to strong axial loads. As the second nonlinearity may have a significant influence upon the behaviour of risers in deep water, a method for automatically updating the structural geometry during the dynamic analysis is given. A computer programme has been written for this purpose. |
| Keywords: | riser dynamic nonlinear large displacement finite elements step by step integration |
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