Structural integrity management of offshore structures via RB-FEA and fast full load mapping based digital twins Conference Paper uri icon

abstract

  • Copyright 2018 by the International Society of Offshore and Polar Engineers (ISOPE) In this work we discuss new capabilities for structural integrity analysis of critical offshore assets such as semi-submersibles and FPSOs that are enabled by Reduced Basis FEA (RB-FEA) coupled with Fast Full Load Mapping to enable high-fidelity Digital Twins. RB-FEA is a new structural simulation framework based on component-based model order reduction, in which (i) a large model is decomposed into components, (ii) each component is endowed with parameters which enable geometric, material, and/or load data to be modified on the fly, (iii) a reduced order model of each component (valid for the entire parameter range) is prepared based on an automated pre-analysis of individual components and groups of components, and (iv) component-based models are assembled and solved very efficiently due to re-use of the reduced order model data. For large models this framework enables orders-of-magnitude increase in model detail and solver speed compared to conventional FEA, without sacrificing accuracy. Fast Full Load Mapping obtains full distributive loads acting on a floating body in random waves at costs of conventional global performance analyses, without any costly CFD. In time domain, these full distributive loads are fed into RB-FEA, and the combination of these two powerful approaches enables new capabilities for detailed hydrodynamic and structural analysis of critical offshore assets. We demonstrate these capabilities with some illustrative examples.

published proceedings

  • Proceedings of the International Offshore and Polar Engineering Conference

author list (cited authors)

  • Knezevic, D. J., Kang, H. Y., Sharma, P., Malinowski, G., & Nguyen, T. T.

publication date

  • January 1, 2018 11:11 AM