利用POD对双坡屋盖风压场预测

Prediction of Wind Pressure Field on Pitched Roof Using POD

本文利用本征正交分解(POD)方法对双坡屋盖未布置测压点位置的风压时间序列进行了预测。采用线性插值及双线性插值得到预测点位置上的本征模态值。结构由原风压场协方差分析得到的主坐标和上述新本征模态值获得未布置测压点位置的风压时间序列。通过在时间域和频率域内比较预测出的风压与实测风压说明了POD在预测双坡屋盖风压场的有效性。

Proper orthogonal decompostion(POD) was used to predict the wind pressure time series on the locations where the pressure taps are not distributed. The linear interpolation and bilinear interpolation were employed to obtain the values of the proper modes on locations where the wind pressure time series are to be predicted. Combining the principal coordinates from the covariance analysis of the original pressure field and the new proper mode values above, the wind pressure time series on the location were acquired where the pressure taps are not distributed. The effectiveness of POD in the prediction of wind pressure field on a pitched roof was illustrated by means of comparing the predicted pressures with the measured values in the time domain and the frequency domain.