Unsteady wind forces on huge structures in a marine city

在一个马林城里，没有什么能阻挡风。马林城中建造的大型建筑物如运动竞技场等将受到风力的显著影响。本研究在填海造地“舞岛”的试验场进行了现场测量，调查了风压、风力及其动态响应的特性。1998年，在试验场设置了带有多个风速计的参考塔，调查了自然风的流动特性。所研究的模型为边长为1m、高为5m的正方形截面的弹性棱柱体。建立了该系统的数学模型，并对其振荡特性进行了研究. 1999年对该地区自然风场特征的研究表明，该地区自然风场以偏西风为主，湍流强度随风向变化而变化，2000年和2001年，该地区自然风场的风速、风向、风压和模型的动力响应均呈上升趋势，2000年和2001年，该地区自然风场的风速、风向、风压和模型的动力响应均呈上升趋势，2000年和2001年，该地区自然风场的风速、风向、风压和模型的动力响应均呈上升趋势，2000年和2001年，该地区自然风场的风速、风压和模型的动力响应均呈上升趋势。摘要通过风洞试验和现场实测，研究了非定常风荷载与弹性棱柱体模型动力响应的关系。结果表明，附加质量随着风速的增加而增加，直到共振速度等等。

In a marine city nothing shuts out the wind flow. There the huge structures as a sports arena and so on constructed in a marine city will be significantly influenced by the wind forces. In this study the field measurements have been carried out at a test site on the reclaimed land called "Maishima" to investigate the characteristics of the wind pressures, wind forces and dynamic response by them.In 1998, the reference tower with the several anemometers was set up at the test site to investigate the characteristics of the natural wind flow. The model under investigation was the elastic prism with the square section of 1m side and 5m height. The model was set up and the oscillation characteristics of it were investigated. Moreover the measurement system has been established as recorded automatically are the wind velocity, wind direction, wind pressures and the dynamic response of the model.In 1999, investigating the characteristics of the natural wind in this area, it was shown that strong winds mainly blew from west-direction, the intensity of turbulence varied in accordance with the wind direction and so on.In 2000 and 2001, by the wind tunnel test and field measurement, the relations between the unsteady wind force and the dynamic response of the elastic prism model were studied. Consequently it was shown that the added mass increased as the wind velocity increased to the resonance velocity and so on.