Dynamic effects on a train-bridge system caused by stochastically generated turbulent wind fields

2020 ◽  
Vol 211 ◽  
pp. 110430 ◽  
Author(s):  
P.A. Montenegro ◽  
D. Barbosa ◽  
H. Carvalho ◽  
R. Calçada
Keyword(s):  
Dynamic Effects ◽  
Wind Fields ◽  
Turbulent Wind ◽  
Bridge System

scholarly journals Non-Stationary Turbulent Wind Field Simulation of Long-Span Bridges Using the Updated Non-Negative Matrix Factorization-Based Spectral Representation Method

2019 ◽  
Vol 9 (24) ◽  
pp. 5506
Author(s):  
Zidong Xu ◽  
Hao Wang ◽  
Han Zhang ◽  
Kaiyong Zhao ◽  
Hui Gao ◽  
...  
Keyword(s):  
Wind Field ◽  
Spectral Representation ◽  
Wind Fields ◽  
Turbulent Wind ◽  
Long Span Bridges ◽  
Long Span ◽  
Spectral Representation Method ◽  
Representation Method ◽  
Turbulent Wind Field ◽  
Non Negative Matrix Factorization

Numerical simulation of the turbulent wind field on long-span bridges is an important task in structural buffeting analysis when it comes to the system non-linearity. As for non-stationary extreme wind events, some efforts have been paid to update the classic spectral representation method (SRM) and the fast Fourier transform (FFT) has been introduced to improve the computational efficiency. Here, the non-negative matrix factorization-based FFT-aided SRM has been updated to generate not only the horizontal non-stationary turbulent wind field, but also the vertical one. Specifically, the evolutionary power spectral density (EPSD) is estimated to characterize the non-stationary feature of the field-measured wind data during Typhoon Wipha at the Runyang Suspension Bridge (RSB) site. The coherence function considering the phase angles is utilized to generate the turbulent wind fields for towers. The simulation accuracy is validated by comparing the simulated and target auto-/cross-correlation functions. Results show that the updated method performs well in generating the non-stationary turbulent wind field. The obtained wind fields will provide the research basis for analyzing the non-stationary buffeting behavior of the RSB and other wind-sensitive structures in adjacent regions.

scholarly journals Wind Field Synthesis for Animating Wind-induced Vibration

2011 ◽  
Vol 10 (1) ◽  
pp. 53-60 ◽  
Author(s):  
Oyundolgor Khorloo ◽  
Zorig Gunjee ◽  
Batjargal Sosorbaram ◽  
Norishige Chiba
Keyword(s):  
Wind Field ◽  
Structural Engineering ◽  
Computational Cost ◽  
Three Dimensional ◽  
Wind Fields ◽  
Simple Method ◽  
Turbulent Wind ◽  
Key Characteristics ◽  
Induced Motion ◽  
Wind Induced Vibration

We present a simple method to generate three-dimensional frozen and non-frozen turbulent wind fields for use in the animation of wind-induced motion. Our approach uses 1/f^_ noise to match the characteristics of natural wind. By employing a noise-based approach, the complexity as well as computational cost is reduced. Additionally, by considering key characteristics of actual wind that are applied in the structural engineering field, our proposed method is able to produce plausible results in outdoor wind field simulations. In this paper, we describe the implementation results of our proposed method and compare them with other existing approaches used to construct turbulent wind fields. The implementation and visualization are carried out for both two- and three-dimensional scenarios and compared with the results of other well-known methods.

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