| 输电塔脉动风荷载功率谱模型及时程模拟 |
| |
| 引用本文： | 谢华平.输电塔脉动风荷载功率谱模型及时程模拟[J].湘潭大学自然科学学报,2011,33(3):70-76. |
| |
| 作者姓名： | 谢华平 |
| |
| 作者单位： | 湘潭大学土木工程与力学学院; |
| |
| 基金项目： | 湖南省教育厅科学研究项目 |
| |
| 摘 要： | 基于风洞试验得到输电塔线性一阶广义荷载谱，推导了输电塔顺风向、横风向基本脉动风压功率谱公式，给出了输电塔顺风向、横风向任意阶广义荷载功率谱及分段脉动风荷载功率谱公式.基于此功率谱，应用谐波叠加法，建立了脉动风荷载时程数值模拟方法.脉动风荷载功率谱不仅与来流的风速、风速谱、气动导纳有关，还与地面粗糙程度、塔架构件的投影面积及沿高度分布情况、压力系数等有关，广义荷载谱还与振型有关.以一窄基输电塔为例，用Matlab语言编程，计算了广义荷载和分段风荷载功率谱，模拟了脉动风荷载时程.算例分析表明，输电塔抗风分析中，横风向脉动风荷载虽然比顺风向小，但远没有到可以忽略的程度，建议考虑横风向脉动风荷载功率谱或施加横风向荷载时程.
|
| 关 键 词： | 风工程 输电塔 功率谱 风荷载时程 谐波叠加法 |
Power Sprctra Model and Time-History Simulation of Fluctuating Windloading Acting on Tranmission Tower |
| |
| XIE Hua-ping,ZHANG Hui,CHEN Jun,YIN Zhi-ming.Power Sprctra Model and Time-History Simulation of Fluctuating Windloading Acting on Tranmission Tower[J].Natural Science Journal of Xiangtan University,2011,33(3):70-76. |
| |
| Authors: | XIE Hua-ping ZHANG Hui CHEN Jun YIN Zhi-ming |
| |
| Institution: | XIE Hua-ping,ZHANG Hui,CHEN Jun,YIN Zhi-ming(College of Civil Engineering and Mechanics,Xiangtan University,Xiangtan 411105 China) |
| |
| Abstract: | Expressions of power spectra of along-wind and cross-wind basic wind pressure of transmission tower are deduced based on the fundamental linear mode generalized force spectra obtained through a wind tunnel test.Power spectra of along-wind and cross-wind fluctuating wind load and generalized wind force acting on transmission tower are presented.Numerical simulation method of time histories of fluctuating wind load is developed based on these spectra and harmony superposition method.Power spectra of fluctuati... |
| |
| Keywords: | wind engineering transmission tower power spectra time history of wind load harmonic wave superimposing method |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《湘潭大学自然科学学报》浏览原始摘要信息 |
| 点击此处可从《湘潭大学自然科学学报》下载免费的PDF全文 |
