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Numerical simulation of 3-D probabilistic trajectory of plate-type wind-borne debris
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  • Journal title : Wind and Structures
  • Volume 22, Issue 1,  2016, pp.17-41
  • Publisher : Techno-Press
  • DOI : 10.12989/was.2016.22.1.017
 Title & Authors
Numerical simulation of 3-D probabilistic trajectory of plate-type wind-borne debris
Huang, Peng; Wang, Feng; Fu, Anmin; Gu, Ming;
To address the uncertainty of the flight trajectories caused by the turbulence and gustiness of the wind field over the roof and in the wake of a building, a 3-D probabilistic trajectory model of flat-type wind-borne debris is developed in this study. The core of this methodology is a 6 degree-of-freedom deterministic model, derived from the governing equations of motion of the debris, and a Monte Carlo simulation engine used to account for the uncertainty resulting from vertical and lateral gust wind velocity components. The influence of several parameters, including initial wind speed, time step, gust sampling frequency, number of Monte Carlo simulations, and the extreme gust factor, on the accuracy of the proposed model is examined. For the purpose of validation and calibration, the simulated results from the 3-D probabilistic trajectory model are compared against the available wind tunnel test data. Results show that the maximum relative error between the simulated and wind tunnel test results of the average longitudinal position is about 20%, implying that the probabilistic model provides a reliable and effective means to predict the 3-D flight of the plate-type wind-borne debris.
probabilistic trajectory model;plate-type wind-borne debris;turbulent wind field;random gust;Monte-Carlo simulation;
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