低矮房屋屋面脉动风压的预测

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (5) : 157-162.

论文

低矮房屋屋面脉动风压的预测

王莺歌1，李正农2，吴红华2，张灵辉1

作者信息 +

Prediction of fluctuating wind pressure on low building’s roof

WANG Ying-ge1，LI Zheng-nong2，WU Hong-hua2, ZHANG Ling-hui1

Author information +

文章历史 +

摘要

利用实测手段研究结构表面风压时，因测点布置数量有限，整个风场面貌不能充分反映，通常用插值法，但直接对时间序列插值难以实现。基于POD技术并借鉴地理统计学中“网格化”思想，对各阶空间本征向量进行处理，引入克里金法插值方法，编制与Surfer软件接口的Matlab程序，利用Surfer软件强大空间插值功能，对结构表面各阶本征向量进行空间插值。通过对台风发生时实测得到的低矮房屋屋盖风压时序的预测及误差分析验证该方法的可行性。研究表明克里金法可弥补三角线性插值法无法外插测点连线范围以外数值的不足，在风压变化梯度较大区域具有优于距离反比法的预测效果。该方法具有较强的通用性，可广泛应用于风洞试验和现场实测。

Abstract

The taps are usually finite in structure’s surface wind pressure research by measurement method, as restricts the wind field’s sufficient appearance. Interpolation is a regular choice, but it’s hard to directly interpolate time series. Basing on POD technique and referring ‘grid’ thought in geographical statistics, this paper processed spatial latent vectors. The Kriging interpolation method was introduced to frame Matlab program interfacing Surfer software whose powerful spatial interpolation capacity got used to spatially interpolate the structure’s surface latent vectors of each phase. Data from measured wind pressure time series of a low-rise building in typhoon are used to verify the feasibility of this method. Research shows that Kriging method can offset deficiency of triangular linear interpolation which can not extrapolate the point out of the scope; moreover Kriging method is better than the inverse distance method on prediction effect when wind pressure varies sharply. This method is relatively universal, could be widely applied in wind tunnel tests & field measuring.

导出引用

王莺歌;李正农;吴红华;张灵辉. 低矮房屋屋面脉动风压的预测[J]. 振动与冲击, 2013, 32(5): 157-162

WANG Ying-ge;LI Zheng-nong;WU Hong-hua;ZHANG Ling-hui. Prediction of fluctuating wind pressure on low building’s roof [J]. Journal of Vibration and Shock, 2013, 32(5): 157-162