定常流对近水面物体辐射问题的影响  

The Effects of Steady Current on the Radiation Problem for a Body Near the Free Surface

作　　者：吴岩[1] 陶建华[1] 

机构地区：[1]天津大学力学系

出　　处：《水动力学研究与进展（A辑）》1995年第3期265-273,共9页Chinese Journal of Hydrodynamics

摘　　要：本文研究了定常流对近水面物体辐射问题的影响，对于近水面物体，物体对自由表面的扰动已不再为小量，因此，在自由表面条件中必须考虑流动非均匀性的影响。利用内、外场匹配的方法，给出了求解流动非均匀性对辐射问题影响的新方法。利用本文提出的内、外场匹配法，对近水面圆柱的辐射问题做了大量的数值研究，计算结果表明，当圆柱的相对淹没深度ｄ／Ｒ＜２．０时，定常流的局部非均匀性的影响是不容忽略的。本文提出的方法可以直接推广到三维和有限水深情况。In this paper, the effects of steady current on the radiation problem for a body near the free surface are stagied. For a they near the free surface, the perturbation to the surface can not be neglected, the effects of non-uniform flow on the free surface have to be considered. By a matching procedure, a new method to bandy the effects of steady current on the radiation problem with non-uniform flow in the nearfield is proposed. By the present matching method, problem of radiation on a corcular cylinder near the free suface are investigated numerically. It is shown that, the effects of local non-uniform flow can not be ignored when the relative submerged depth of the circular cyinder(d/R) is less than 2. 0. The present matching procedure can be generalized to the cases of three dimensional problem and the problem with finite depth.

关 键 词：定常流 非均匀流 辐射问题 船舶流体力学 

分 类 号：U661.1[交通运输工程—船舶及航道工程]