<div><br></div> <div>동역학 부분인데요.</div> <div><br></div> <div>mirror principle에 대해 알고 싶습니다.</div> <div><br></div> <div>잘 이해를 못하겠네요.</div> <div><br></div> <div>mirror principle에 의해 유체의 virtual mass가 왜 저래 되는지 모르겠네요.</div> <div><br></div> <div><span style="font-size:9pt;">2.3 Main assumptions of the theory</span></div> <div> <div><br></div> <div>The ship manoeuvring theory is based on the following assumptions:</div> <div><br></div> <div> The ship motion is occurred only in the horizontal plane x-y. </div> <div> Heave <span style="font-size:9pt;">velocity, rolling and pitching are neglected (Vz = 0, </span><span style="font-size:9pt;">ω</span><span style="font-size:9pt;">x = </span><span style="font-size:9pt;">ω</span><span style="font-size:9pt;">y = 0).</span></div> <div><span style="font-size:9pt;"><br></span></div> <div> The Froude number is small and the free surface deformation is <span style="font-size:9pt;">neglected. </span></div> <div><br></div> <div>The mirror principle is used to model <span style="font-size:9pt;">the free surface effect. </span></div> <div><span style="font-size:9pt;">Hydrodynamically the ship is considered as </span><span style="font-size:9pt;">a doubled body without any </span><span style="font-size:9pt;">flow boundaries except the ship.</span></div> <div>The doubled body has two symmetry planes that is why the ship has only <span style="font-size:9pt;">eight added mass: m11, m22, m33, m44, m55, m66, m26, m35. </span></div> <div>The static moment <span style="font-size:9pt;">of the doubled body and the product of inertia are zero, i.e. Sz = 0 and </span><span style="font-size:9pt;">Ixz = 0.</span></div></div> <div><br></div>
댓글 분란 또는 분쟁 때문에 전체 댓글이 블라인드 처리되었습니다.