Releases: ECheynet/windSimFast
Wind field simulation (the fast version)
Wind field simulation (the fast version)
- Updated the data for Example 1
- A function to convert the output of windSimFast to .bts file is included. I ignore if it performing well at the moment.
Wind field simulation (the fast version)
Correction of a minor bug in the definition of the lowest frequency
Example 3 is removed as it allowed the use of unrealistic quad and co-coherence combinations
Wind field simulation (the fast version)
Small update due to previous compatibility issue with Matab File Exchange
Wind field simulation (the fast version)
- Correction of typos in Example 3
A full description of the Matlab code and the documentation is available at https://se.mathworks.com/matlabcentral/fileexchange/68632-wind-field-simulation-the-fast-version
Wind field simulation (the fast version)
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Added an option to account for the quad-coherence in the simulation of turbulence
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Added an example file illustrating the implementation of the quad-coherence
A full description of the Matlab code and the documentation is available at https://se.mathworks.com/matlabcentral/fileexchange/68632-wind-field-simulation-the-fast-version
v1.4
A three-variate turbulent wind field (u,v and w components) is simulated in three-dimensions.
View Wind field simulation (the fast version) on File Exchange DOI
Summary
A turbulent wind field (u,v,w, components) in 3-D (two dimensions for space and one for the time) is simulated using random processes. The computational efficiency of the simulation relies on Ref. [1], which leads to a significantly shorter simulation time than the function windSim, also available on fileExchange. However, only the case of a regular 2D vertical grid normal to the flow is here considered.
Content
The submission contains:
- An example file Example1 that illustrates simply how the output variables look like.
- An example file Example2, which is more complete, and which simulates a 3-D turbulent wind field on a 7x7 grid.
- A data file exampleData.mat used in Example1.
- The function windSimFast.m, which is used to generate the turbulent wind field. A similar implementation of windSimFast.m was used in ref. [2].
- The function getSamplingpara.m, which computes the time and frequency vectors.
- The function KaimalModel.m, which generates the one-point auto and cross-spectral densities of the velocity fluctuations, following the Kaimal model [3]. I have corrected the cross-spectrum density formula used by Kaimal et al. so that the simulated friction velocity is equal to the target one.
- The function coherence used to estimate the root-mean-square coherence, the co-coherence and the quad-coherence.
Any comment, suggestion or question is welcomed.
References
[1] Shinozuka, M., & Deodatis, G. (1991). Simulation of stochastic processes by spectral representation. Applied Mechanics Reviews, 44(4), 191-204.
[2] Wang, J., Cheynet, E., Snæbjörnsson, J. Þ., & Jakobsen, J. B. (2018). Coupled aerodynamic and hydrodynamic response of a long span bridge suspended from floating towers. Journal of Wind Engineering and Industrial Aerodynamics, 177, 19-31.
[3] Davenport, A. G. (1961). The spectrum of horizontal gustiness near the ground in high winds. Quarterly Journal of the Royal Meteorological Society, 87(372), 194-211.