【摘要】 <正> 船舶阻力的换算方法是船舶阻力学科的基础。六十年代以前,各国水池一直沿用传统的傅汝德方法(也称船舶阻力的二因次换算方法),所得结果一般尚能与实际接近,但严格地从物理意义上讲,傅汝德方法是不够合理的。随着肥大船型的发展,傅汝德换算方法的不合理性愈益突出,因为在与实船试验结果分析比较时,常出现负值粗糙度补贴(即船模实船换算补贴)。这样,早在1954年由Hughes提出的三因次换算方法又重新得到人们的重视。更多还原

【Abstract】 This article describes the research work which was carried out at Shanghai Jiao Tong University on the three-dimensional extrapolation of ship resistance. It is concluded that the three-dimensional extrapolation not only can be used for single-screw ships, but also can satisfactorily be extended to twln-screw ships with shaft appendages.更多还原