Coupled numerical model for the nonlinear dynamics of deepwater single barge installation system

ABSTRACT

Equipment damage, operational and personnel safety are critical for the sustenance of marine engineering and offshore oil and gas projects. Deepwater installation of heavier equipment are usually faced with harsh environmental conditions which could lead to accidents and assets damage if not carefully handled. In this paper, a floating barge with suspended payload and 3-DOF is modelled to investigate the dynamic response of the floating installation system to oscillating loads, wire-rope tensions, and payload positions. By using Velocity Transformation Technique and Lagrange Energy Method the coupled equations of motion system for a 6-DOF multibody dynamic model are established. The coupled equations of motion systems are numerically solved with Fourth-Order Runge-Kutta Method. The accuracy of the proposed model is validated with the existing floating barge model and it performs better than the OrcaFlex and MOSES models. The proposed model will improve operational design for safe ocean engineering and deepwater equipment installations.

KEYWORDS:

• Coupled analytical model
• multibody dynamic system
• velocity transformation technique
• floating installation system
• Lagrange energy method

Acknowledgements

All of which are gratefully acknowledged.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the National Key Research and Development Program of China [grant number 2016YFC0303700], and China 111 Project [grant number B18054].