Simulation of blended nonlinear hydrodynamics forces using radial basis function in uniform moving frame

OCEAN ENGINEERING

卷:198

Article

Khalid, M. Saeed¹  Nisar, Salman^1,2  Khan, Sohaib Zia³  Khan, Muhammad Ali⁴  Troesch, Armin W.⁵ 

[1] Natl Univ Sci & Technol, PN Engn Coll, Dept Ind Mfg Engn & Management, PNS Jauhar, Karachi 74500, Pakistan

[2] Taibah Univ, Coll Engn, Dept Mech Engn, POB 344, Madinah, Saudi Arabia

[3] Islamic Univ Madinah, Fac Engn, Dept Mech Engn, POB 170, Madinah, Saudi Arabia

[4] Cranfield Univ, Sch Aerosp Transport & Mfg, Cranfield, Beds, England

[5] Univ Michigan, Dept Naval Architecture & Marine Engn, Ann Arbor, MI 48109 USA

关键词: Blended technique;    Radial basis function;    Strip-theory;    Radiation and diffraction pressures;    Moving frame;   

DOI  :  10.1016/j.oceaneng.2020.106994

来源: Elsevier

【 摘 要 】

This study focuses on the development of a blended technique in moving frame which encompasses nonlinearities and real time simulation of the vital early design parameters using combined exact nonlinear and quasi-nonlinear forcing terms. Generally, a full three-dimensional problem needs to be solved for the precise forward speed correction. However, in this paper the forward speed end corrections are calculated by converting the two dimensional velocity potential into a three dimensional mathematical function using radial basis function then partial differentiation is performed with respect to the longitudinal direction. The difference between the forward speed correction used for time simulation in the blended method and the strip-theory in the frequency domain has been explained. The use of radial basis functions for the estimation of quasi-nonlinear combined radiation and diffraction pressures in moving frame and their conversion between two and three dimensions has been demonstrated and validated experimentally.

【 授权许可】

Free