Numerical Study On Hydrodynamic Response Of Marine Nuclear Power Platform With Soft Yoke Mooring System

Marine nuclear power platform is maritime mobile type small nuclear power plant, is the organic combination of small nuclear reactor and marine engineering. Ship engineering mainly includes nuclear boat and Soft Yoke Mooring System. In this paper, the marine nuclear power platform to be studied is designed by Dalian University of Technology, to be applied to the Bohai shallow waters, to provide energy support for the oil exploitation of Bohai. The nuclear electric boat is adopted as the platform, and the Soft Yoke Mooring System can withstand the sea condition of 100 years return period of Bohai.In this paper, the methods of model test and numerical simulation are used. The following several aspects of research are carried on:First of all, the condition of model test and numerical simulation are introduced in detail, and the Potential Flow Theory which is related to the numerical simulation software AQWA is described; and the Similarity Theory is introduced.Second, this paper studies the rolling, pitching and heave motion in regular waves. Under different incident wave angle, the frequency response function is studied, and the draft is also considered.Third, multi body dynamic analysis model is established. Longitudinal stiffness of soft yoke mooring system is obtained through theoretical calculation, model test and numerical simulation, and the results are in good agreement. Motion and force is studied in irregular waves of 180°Fourth, the hydrodynamic response characters are studied in different combination of wind, waves and current. When there is a lateral environmental load, the platform movement is violent. Adding roll, surge, sway, yawing damping coefficients can effectively improve the system movement form and reduce mooring force. The bilge keel can significantly reduce rolling motion, and the difference between model tests and AQWA are analyzed.