The paper documents the implementation of UEL into Abaqus and the establishment of global riser model for both static and dynamic analysis on which the pipe is modelled efficiently as series of unidirectional beam elements from floater to seabed, resting on a bed of nonlinear springs. In this paper, one of the existing nonlinear hysteretic seabed model, already been used in a commercial analysis program OrcaFlex, has been implemented into general finite element software Abaqus, through the coding of a user defined element (UEL) subroutine. Due to complexity of the models and also limited access to special software packages with in-built nonlinear soil models, traditional simple linear soil models are still being used widely for riser analysis, in particular for fatigue design. Few hysteretic nonlinear riser-soil interaction models have recently been introduced and some of them have been implemented in commercial software packages for analysis and design of riser systems. Accurate simulation of the riser-soil interaction has significant effects on the fatigue performance in the TDZ. The cyclic interaction of the riser with seabed leads to a number of complex nonlinear behaviors including soil suction, separation of the riser from the soil, trench formation and degradation of soil resistance during cyclic loading. Fatigue design of SCRs in the touchdown zone (TDZ) is among the most complicated engineering challenges in riser design. Use industry standard software (e.g.Copyright © 2016 by ASME.Steel Catenary Risers (SCRs) provide a technically feasible and commercially efficient solution for the offshore field developments in deep waters.Perform and/or supervise numerical analyses on riser systems from conceptual design to full detailed engineering and in-service integrity verification (bonded and unbonded flexible pipes, steel pipes, riser towers, water intake risers, dynamic power cable etc.).Strong knowledge in either DEEPLINES or Orcaflex.
Strong knowledge in codes, standards, methodologies, numerical tools and state of the art riser design approaches.10 years with at least 3 years in a similar position Bachelor’s Degree in mechanical or Ocean Engineering.Our client, world's largest Oil & Gas company, is urgently looking for a “Senior/Lead Riser Engineer” willing to work under the following conditions for an upcoming project:
0 kommentar(er)
