細長体理論による船体運動の解析(その2) : 細長体理論による力およびモーメントの計算

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The motions of ships travelling throughr egular head sea waves with constant forward speed are analysed by the slender body theory. In this paper, especially the forces and moments acting on ship are considered, while in the previous paper the potentials for ship motion are discussed extensively. So far, the analyses of the ship motion by the slender body theory have been studied almost for the four cases. The cases are characterized by the assumption for the order of the magnitude of ship slenderness, wave length of the incident waves and ship speed. The details of the analyses are throughly dipicted in that paper (Part 1). However, it may be sufficient to investigate only the two cases, namely case 1ω=0(1), U=0(1) and the case 2ω=0(ε^<-1/2>, U=0(ε^<1/2>) with ε the slenderness parameter of ship, in order to know the essential features of hydrodynamic forces and moments acting on ship. The symmetry relation for coupled motion and the so-called Haskind-Hanaoka-Newman relation are considered in the near field force-moment field. Then it turned out that the symmetry relation is held as like in the linearized force-moment field but the Haskind-Hanaoka-Newman relation is broken in the near field. Several new findings in the wave excitation problem for the case 2 are very important and interesting. They can explain the phenomena that the strip theory could not. They heve not so far been known well and studied.
独立行政法人海上技術安全研究所の論文
1976-05-31

細長体理論による船体運動の解析(その2) : 細長体理論による力およびモーメントの計算

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