Numerical simulation on heave damping of new sandglass-type FPSO

ABSTRACT

In this paper, due to the special shape of the sandglass-type floating body, the characteristic of heave damping of the sandglass-type floating production, storage and offloading (FPSO) unit is mainly discussed by the computational fluid dynamics method. Firstly, the numerical model for free heave decay motion of the sandglass-type floating body was created, and the accuracy of the numerical model has been validated by the experimental data. Then, the scale effect on the heave damping of sandglass-type FPSO was further discussed. Furthermore, to provide a reference for the design criteria of sandglass-type floating body, the relationships between its heave decay coefficients and shape parameters were analysed based on the orthogonal test and single-factor analysis method. Finally, the estimation formula of the decay coefficients was obtained by means of the optimisation algorithm, which can be used for the preliminary design of the shape of the sandglass-type floating body.

KEYWORDS:

• Sandglass-type FPSO
• heave damping
• heave decay motion
• CFD numerical simulation
• shape parameter
• orthogonal test

Acknowledgement

The authors are grateful to all organisations that funded the researches in this paper, which was financially supported by the National Natural Science Foundation of China (General Program) (Grant No. 51679034), and Collaborative Innovation Center of Major Machine Manufacturing in Liaoning Province.

Disclosure statement

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

Additional information

Funding

The authors are grateful to all organisations that funded the researches in this paper, which was financially supported by the National Natural Science Foundation of China (General Program) [grant number 51679034], and Collaborative Innovation Center of Major Machine Manufacturing in Liaoning Province.