Analysis of FPSO Topside Module Beam Structures through Shell and Beam Concept Modeling Technique

Abstract

Some engineering applications like civil structure, marine & offshore structure demand the evaluation of large structures. This large structure experiences the stress concentrations at the joint interfaces which are major concerns in engineering. The evaluation of large structures is carried out through finite element analysis (FEA) which is having pitfalls of modeling efforts, solution time and memory requirement. The large structures are generally modelled using beam elements due to minimum modelling efforts & solution time in FEA. However, it is difficult to capture the correct stress concentrations at critical locations from beam model. In addition to that, all the load transfer in the beam element model takes place at the single nodal connection. The present study describes a means with which one can reasonably and accurately ascertain the analysis of large beam FPSO topside module structures through concept modeling techniques. Concept modelling is combined model of 1D beam elements and 2D shell elements. The beam elements are used to model members and shell elements are used to model critical joint locations incorporating stiffeners and weld details. Thus single model will provide all significant stresses and accurate results which can useful to investigate structural details for local stress concentration.

Keywords: FEA, 1D, Beam, FPSO, concept modeling

Cite this Article
Rakesh K. Patil, Giridhar Kumar, Nitesh Karanpuria et al. Analysis of FPSO Topside Module Beam Structures Through Shell and Beam Concept Modeling Technique. Journal of Offshore Structure and Technology. 2015; 2(3): 1–8p.