Deepwater jacket platform has found wide application in the South China Sea. Real-time and accurate acquisition of the forcing state of concerned members of the deepwater jacket platform can assess the safety status of the platform in service. Using the digital twinning methodology, this paper presents an axial force inversion method of deepwater jacket platform and carries out field verification on the LF 15-1 platform which is the largest jacket in Asia. Firstly, a digital twinning framework is established through an on-field monitoring system. Then, based on SACS simulation database and sea state interpolation algorithm, a procedure to calculate the axial force of concerned member under monitoring is developed. Finally, feasibility of the algorithm is verified on the LF 15-1 deepwater jacket platform with the prototype of monitored sea state data. The research results can provide reference for operation and maintenance of deepwater jacket platforms.

digital twin  /  deepwater jacket platform  /  axial force inversion