In order to accurately analyze the acceleration load acting on the general FPSO pipeline system, based on the potential flow theory, the hydrodynamic calculation software is used to analyze the long-term forecast value of the acceleration of the general FPSO under different overrun probabilities, and the calculated value of the fatigue load coefficient for fatigue evaluation is obtained, and the regression analysis is carried out. At the same time, the design wave method is used to convert the acceleration envelope value at any position of the general-purpose FPSO into a fatigue evaluation load, and a simplified formula for acceleration calculation is fitted. The results show that the applicability of the simplified formula is ideal. Provides a simple algorithm for calculating acceleration loads for general-purpose FPSOs.
The general purpose FPSO may encounter captain misjudgment, mooring system failure, direct alignment with the direction of the coming wave, and lead to a variety of wave directions, such as oblique wave, cross wave, and aft wave. The fluid analysis software FLUENT was used to simulate the general FPSO model, and seven wave directions of 0°, 30°, 60°, 90°, 120°, 150°, and 180° were simulated. The results show that the ship’s bow can withstand the extreme waves with the 100-year recurrence period in the Brazilian sea area successfully, but all the other conditions have different degrees of upsurge phenomenon. In addition, the bow board can resist not only the bow board up-wave phenomenon but also the bow board and cross wave, which makes the bow board up-wave degree lower. In the case of wave direction of 120°, 90°, and 180°, the threat degree of upsurge is very high, and it is necessary to further evaluate the capsizing risk. This conclusion has certain guiding significance for the design of ship-type FPSO in the following extreme sea conditions.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.