平头旋转体撞水水弹性效应和气垫效应研究  

A STUDY OF HYDROELASTIC EFFECT AND AIRCUSHION EFFECT OF A REVOLUTIONARY SHELL WITH FLAT NOSE

作　　者：程贯一[1] 张效慈[1] 欧阳吕伟[1] 

机构地区：[1]中国船舶科学研究中心

出　　处：《中国造船》1990年第2期41-50,共10页Shipbuilding of China

摘　　要：本文采用一种严格满足流体动力学和弹性动力学以及初边值条件的数值方法研究了平头旋转体撞水水弹性效应。在数值计算中,分别在水域采用有限差分法,在水域采用特征线法。 如果不考虑气垫效应,撞水压力将不现实地过高。为此,本文精确地揭示了平头旋转壳体撞水过程中的气垫效应和壳体瞬态响应的细节,获得了壳体和流体早期运动的完整图象。计算结果与测试值吻合良好。A numerical method for calculating the hydroelastic effect of a revolutionary shell with flat nose, which satisfies strictly the hydrodynamic and elasto-dynamic equations, is presented. In the process of calculation, the finite difference method is used in the water region and the chacteristic line method in the air region respectively.If the air cushion effect is not to be considered, the impact pressure will be unrealistically high. The paper reveals accurately the detailed cha racteristics of instantaneous responses of the shell and gives complete motion pictures of the shell and flow in the early period. The calculation results are in accordance with the measured data.

关 键 词：平头旋转体撞水 水弹性效应 气垫效应 数值计算 有限差分法 

分 类 号：O351[理学—流体力学]