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| Algorithm for the unsteady aerodynamic loads of high-speed trains under stochastic winds |
| Received:February 18, 2012 Revised:September 15, 2012 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201303007 |
| KeyWord:fluctuating winds unsteady aerodynamic forces power spectral density wind angle peak factor |
| Author | Institution |
| 于梦阁 |
西南交通大学牵引动力国家重点实验室, 成都 |
| 张继业 |
西南交通大学牵引动力国家重点实验室, 成都 |
| 张卫华 |
西南交通大学牵引动力国家重点实验室, 成都 |
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| Abstract: |
| The fluctuating winds of a moving point shifting with trains are calculated in this paper based on Cooper theory and harmonic superposition method.And the characteristic of power spectral density of fluctuating winds is analyzed.An algorithm is proposed to calculate the unsteady aerodynamic loads of high-speed trains under side-winds based on the algorithm of calculating cross wind forces of high-speed trains.The force statistics under side stochastic winds and the peak factors of aerodynamic loads are analyzed using this algorithm.The results show that,when the wind angle is close to 90,the dimensionless power spectrum is moving to a higher frequency range.The wind angle has little effect on the fluctuating wind.At each wind angle,the ratio of load standard deviation to mean load depends only on the side slip angle.The peak factors of the side force and roll moment are the same,and the peak factors of the yaw moment and pitch moment are also the same. |