A New Approach to Estimate Design Wind Characteristics for Extensive Pressure System Storms

估计大压力系统风暴设计风特性的新方法

• 批准号: 9361914
• 负责人: Peter Vickery
• 金额: $ 6.5万
• 依托单位: Applied Research Associates, Inc. (Raleigh)
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-01-15 至 1994-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9361914&HistoricalAwards=false
• 关键词: New; Approach; Estimate; Design; Wind

9361914 Vickery Estimates of design windspeeds in the nonhurricane-prone region of the United States are derived from historical records of windspeeds obtained from surface level anemometers. These surface-level windspeed measurements are subject to errors produced by terrain effects, nearby structures and vegetation, changes in the height of the anemometer over time, and observation errors. These measurements are made only at fixed anemometer stations and there is no first principle method to estimate winds at other locations. This research project investigates an innovative method for determining windspeeds and their spatial variations for extensive pressure systems (EPS) using a first principle direct analysis approach. The proposed methodology makes use of the recently available, and inexpensive, data set of historical records of surface pressures for the contiguous United States. Using this data, the pressure field can be reconstructed on an hour-by-hour basis. From the reconstructed pressure field a continuous record of windspeed and direction at gradient height can be generated at any one location or multiple locations in the United States. The approach eliminates the problems which plague surface- level measurements and provides a means to estimate area- wide risk associated with the passing of intense, large- scale, low pressure systems. This is an SBIR Phase I project. ***

9361914 Vickery美国非飓风多发区的设计风速估计值来自于地表风速计获得的风速历史记录。 这些地面风速测量值会受到地形影响、附近建筑物和植被、风速计高度随时间的变化以及观测误差的影响。 这些测量只在固定的测风站进行，没有第一原理方法来估计其他地点的风。 本研究项目探讨了一种创新的方法来确定风速及其空间变化的广泛的压力系统（EPS）使用第一原理直接分析方法。 拟议的方法利用最近可用的，廉价的，数据集的历史记录的表面压力为美国本土。 使用这些数据，可以逐小时重建压力场。 从重建的气压场，可以在美国的任何一个位置或多个位置产生梯度高度处的风速和风向的连续记录。 该方法消除了困扰地面测量的问题，并提供了一种方法来估计与强，大规模，低压系统通过相关的区域范围的风险。 这是SBIR第一阶段项目。 ***