波浪物理模型试验中风速比尺确定方法初探

在波浪模型试验中研究风对构筑物的作用时,会涉及到风速比尺的确定问题。风对构筑物的作用力包括惯性力和粘滞力,这2种力的大小与建筑物的形态有关,对有的构筑物的作用力以惯性力为主,有的则以粘滞力为主。所以,在波浪物理模型试验中不能简单地采用重力相似准则也不能采用粘滞力相似准则来确定风速比尺。根据大量的试验研究结果,提出了采用不同模型比尺的船舶模型试验来确定风速比尺的方法,为波浪模型试验中风场模拟和数据处理提供了依据。

A Preliminary Study on the Determination Method of Wind Speed Scale in Physical Wave Model Test

In the wave model test,the study of action of wind on structure will be involved in the determination of wind speed scale.The acting force of wind on structure includes inertial force and viscous force,the magnitudes of the two forces are related to the shape of structure,the acting force on a kind of structure is dominated by inertial force,and that on another kind of structure is dominated by viscous force,so neither gravity similarity criterion nor viscous force similarity criterion only can be used to determine the wind speed scale in the physical wave model test.In this paper,the method for determining the wind speed scale by using ship model test with different model scales is proposed,which will provide basis for simulating wind field and processing data in the wave model test.