On the Use of Balloon Data to Define Wind Speeds for Tall Structures.

摘要

The report is concerned with methods of making use of balloon data to obtain estimates of design wind speeds at gradient height and at about 200M above ground. The nature and extent of balloon data available in Australia is described and an approach to the analysis of this data is developed. The methods of analysis are applied to data obtained from balloon releases at Kingsford Smith Airport,Sydney and the design wind speeds so determined are compared with those prescribed by the existing wind code and with speeds determined from a ground level anemometer and extrapolated to upper levels by means of model studies. The design wind speeds determined from balloon data were found to be in satisfactory agreement with those determined from the ground station and those prescribed in the wind code.