4.7 Article

An improved random forest algorithm and its application to wind pressure prediction

Journal

INTERNATIONAL JOURNAL OF INTELLIGENT SYSTEMS
Volume 36, Issue 8, Pages 4016-4032

Publisher

WILEY-HINDAWI
DOI: 10.1002/int.22448

Keywords

decision tree; ensemble algorithm; machine learning; random forest; wind engineering

Funding

  1. Young Scientists Fund [62002074]

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An improved random forest (RF) algorithm is proposed for wind pressure prediction in this paper, which shows good performance in predicting wind pressure coefficients of high-rise buildings and maintaining acceptable relative error in engineering terms.
When making regression predictions, the traditional random forest (RF) algorithm can only make predictions within the training set, which can easily lead to overfitting when modeling data have some specific noise. To solve the problem of over-fitting, an improved RF method is proposed in this paper for wind pressure prediction. With the aim to verify the prediction performance of the improved RF algorithm, this paper predicts the wind pressure coefficients of a high-rise building model without wind pressure measurement points. The results show that the improved RF can achieve good results in predicting the mean and fluctuating wind pressure coefficients of high-rise buildings, and its relative error for each measurement point is basically controlled at 5%, which is acceptable in engineering terms. Further applications show that this improved RF can be used for wind pressure distribution prediction in other large-span building type wind tunnel tests.

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