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RANDOM VIBRATION ANALYSIS OF DYNAMIC CHARACTERISTICS OF TALL BUILDING STRUCTURE BASED ON POWER SPECTRAL DENSITY OF WIND PRESSURE METHOD
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摘要: 基于脉动风的基本理论和Davenport风荷载功率谱,介绍计算高层建筑结构顺风向动力响应的计算方法,提出在频域内对高层建筑结构迎风面通过施加风压功率谱的方法进行高层建筑结构的随机振动分析。借助ANSYS对结构进行定制功率谱函数并加载,得到高层建筑结构自振频率及风压谱施加后的模态、应力变化情况,并将函数加载结果与静力求解结果进行分析比较。Abstract: Based on basic theory of pulsating wind and Davenport's power spectrum of wind pressure,a calculating method of wind-excited response of tall building structures in frequency domain is presented,the random vibrations analysis of tall building structures by power spectral density of the wind pressure is also carried out.The natural frequency,the mode and change in stresses after applying the wind pressure spectra to the structure are obtained by power spectral density based on ANSYS.The results indicate that analysis and treatment methods presented here are reasonable and feasible.
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Key words:
- tall building structure /
- wind load /
- power spectral density of wind pressure /
- ANSYS
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