An empirical model of a downburst

被引：225

作者：

Holmes, JD ^{[1
]}

Oliver, SE

机构：

[1] Monash Univ, Dept Mech Engn, Clayton, Vic 3168, Australia

[2] Weather Solut Pty Ltd, Main Ridge, Vic 3928, Australia

[3] JDH Consulting, Mentone, Vic 3194, Australia

来源：

ENGINEERING STRUCTURES | 2000年 / 22卷 / 09期

关键词：

downburst; thunderstorm; wind load;

D O I：

10.1016/S0141-0296(99)00058-9

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

A "downburst" was defined as a strong downdraft which induces an outburst of damaging winds on or near the ground. Such events normally occur during thunderstorms. It has been well documented that downbursts cause frequent failures of high voltage electricity transmission towers in Australia, and several other countries. The present paper describes a model of the horizontal wind speed and direction in a travelling downburst, generated by the vector summation of the "environmental" wind speed, or translation speed, and the radial wind generated by an impinging jet. Good agreement is achieved between the model and recorded data from a high intensity downburst that occurred at Andrews Air Force Base in 1983. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：1167 / 1172

页数：6