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Unsteady wind forces on huge structures in a marine city

海洋城市巨大建筑上的不稳定风力

基本信息

批准号：
10305041
负责人：
TANIIKE Yoshihito
金额：
$ 27万
依托单位：
Osaka City University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10305041/
关键词：
Elastic prism model Unsteady wind force aerodynamic damping force Dynamic response Field measurement Wavelet transform ウェーブレット変換付加質量非定常風力自然風観測角柱模型

项目摘要

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.

在一座海洋城市里，没有什么能阻挡风的流动。海洋城市中修建的体育场馆等大型建筑物，受风力的影响较大。本研究在名为“舞岛”的填海试验场进行了现场测量，以研究风压、风力及其动力响应的特征。1998年，在试验场建立了装有多个风速计的参考塔，以研究自然风流的特征。所研究的模型为边长1m、高5m的方形截面弹性棱柱。建立了模型并研究了其振荡特性。并建立了测量系统，自动记录风速、风向、风压以及模型的动态响应。1999年，调查该地区自然风的特点，发现强风主要从西向吹来，湍流强度随风向变化等。2000年和2001年，通过风洞试验和现场测量，得出了风速与风速之间的关系。研究了非定常风力和弹性棱柱模型的动力响应。结果表明，随着风速增加到共振速度等，附加质量增加。