Session: 01-08-01 Digital Twin Applications to Offshore Systems

Paper Number: 105101

105101 - Developments of the Glen Lyon Fpso Digital Twin: Vessel Response and Structural Monitoring 

This paper presents the continuing developments of the Glen Lyon FPSO Digital Twin. The objective of the Glen Lyon Digital Twin has always been to maintain vessel integrity and ensure operation within the allowable design limits. A detailed vessel motion response and loads monitoring is being undertaken to keep track of the fatigue life consumption of the hull structure, and to take preventive maintenance actions as needed to ensure integrity. The structural response monitoring system onboard the vessel Integrated Marine Monitoring System (IMMS), consists of tri-axial accelerometers, rotation rate sensors, strain gauges, relative water elevation (airgap) monitoring, and bow pressure sensors for slamming events. These measurements from the IMMS are accessed and post-processed through BMT DEEP, harnessing the benefits of Digital Twin Technology, by bringing in data from all sources and enabling to synthesize and monitor the FPSO response in near real-time from any remote location through the structural dashboard.

The structural dashboard monitors the vessel dynamic stability, relative environment headings, and vessel offsets, through several statistical distribution charts. The hull girder bending moments are continuously monitored through deflections measured by the deck strain gauges. Also, the vessel fatigue damage is computed from the deck strain gauge measurements. Apart from these responses, the vessel motion responses like relative wave elevations and vertical accelerations at the turret center, are also being utilized to help monitor vessel fatigue life consumption by comparison with established fatigue curves using these parameters. Comparisons are made with the predicted fatigue damage rates during the vessel design. Some key insights and findings from these comparisons are presented. The challenges faced in this process are highlighted, along with the steps taken to overcome those. The operation of this structural dashboard will continue to provide correlations between measurements and design predictions over time.

Presenting Author: Suvabrata Das BMT Commercial USA Inc.

Presenting Author Biography: Suvabrata Das is currently working as a Senior Data Analyst with BMT Commercial USA Inc. The focus of his present work is asset monitoring and digital twin development. He has over 15 years of industry experience as a Naval Architect, in the field of hydrodynamic and structural analysis. He has earlier obtained his Ph.D. and M.S. in Ocean Engineering from the University of Hawaii at Manoa, and his bachelor's degree in Naval Architecture from the Indian Institute of Technology at Kharagpur.

Authors:

Jonathan Bailey bp
Richard J Bamford bp
Suvabrata Das BMT Commercial USA Inc.
Soma S Maroju BMT Commercial USA Inc.
Robert J. Barker BMT Commercial USA Inc.