| 基于演化相位谱的脉动风速模拟 |
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| 引用本文： | 阎启,李杰,. 基于演化相位谱的脉动风速模拟[J]. 振动与冲击, 2011, 30(9): 163-168. DOI: |
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| 作者姓名： | 阎启 李杰 |
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| 作者单位： | 1. 同济大学建筑工程系，上海 200092；2. 同济大学土木工程防灾国家重点实验室，上海 200092 |
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| 基金项目： | 国家自然科学基金创新群体(50621062),国家自然科学基金(505080265,0778135) |
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| 摘 要： | 基于理性分析，提出了一种演化相位谱模型，并由此发展了脉动风速模拟方法。根据湍流中不同频率涡旋的特征速度，提出了相位演化速度这一概念；进而，说明具体的风速时程可由所有初始相位为零的涡旋经过时间 演化而来。通过对实测脉动风速 值的识别和统计，给出了 的概率分布。据此，可以得到演化相位谱的样本，结合Fourier幅值谱，应用逆Fourier变换便可进行脉动风速模拟。本文所建立的演化相位谱模型是对Fourier相位谱的一种理性描述，可用于各种结构抗风计算及可靠度分析的风荷载模拟当中。
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| 关 键 词： | 相位角 相位演化速度 演化相位谱 脉动风速模拟 |
Evolutionary-phase-spectrum based simulation of fluctuating wind speed |
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| YAN Qi,LI Jie. Evolutionary-phase-spectrum based simulation of fluctuating wind speed[J]. Journal of Vibration and Shock, 2011, 30(9): 163-168. DOI: |
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| Authors: | YAN Qi LI Jie |
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| Affiliation: | 1. Department of Building Engineering, Tongji University, Shanghai 200092, China;2. State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China |
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| Abstract: | Based on rational analysis,an evolutionary-phase-spectrum model which can be used in fluctuating wind speed simulation was proposed.According to the characteristic speed of eddies with different frequencies in turbulence,the concept of phase-evolving speed was put forward.Afterwards,it was illustrated that real wind speed history can be regarded as the evolutionary results of eddies with initial phases of zero after an evolutionary time Te.The probability distribution of Te was calculated through statistics... |
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| Keywords: | phase angle phase-evolving speed evolutionary-phase-spectrum simulation of fluctuating wind speed |
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