| 基于实测风谱的润扬悬索桥桥址区三维脉动风场模拟 |
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| 引用本文： | 王浩,李爱群,谢以顺,李杏平.基于实测风谱的润扬悬索桥桥址区三维脉动风场模拟[J].东南大学学报(自然科学版),2009,39(6). |
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| 作者姓名： | 王浩 李爱群 谢以顺 李杏平 |
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| 作者单位： | 东南大学混凝土及预应力混凝土结构教育部重点实验室,南京,210096 |
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| 基金项目： | 国家自然科学基金资助项目，国家杰出青年基金资助项目，国家科技支撑计划资助项目，国家自然科学基金青年基金资助项目，国家教育部博士点基金资助项目 |
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| 摘 要： | 针对大跨度悬索桥的结构形式和振动模态特点,结合自然风的相关特性,给出了一种简化的三维脉动风场模拟方法,将实际面状的三维脉动风场简化为多个线状的一维脉动风场.基于谐波合成法,并运用FFT技术,进行了润扬悬索桥桥址区三维脉动风场的模拟.为了真实反映桥址区强风特性,模拟目标功率谱采用由该桥结构健康监测系统实测台风数据运用非线性最小二乘法拟合而得的拟合谱.结果表明,该风场模拟方法计算效率较高,主梁与主塔结构脉动风场的模拟值均与目标值吻合较好,验证了该风谱模拟方法的有效性和可靠性.
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| 关 键 词： | 悬索桥 结构健康监测系统 紊流功率谱 风场 数值模拟 谐波合成法 |
Digital simulation of 3-dimensional turbulence wind field of Runyang Suspension Bridge based on measured wind spectra |
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| Wang Hao Li Aiqun Xie Yishun Li Xingping.Digital simulation of 3-dimensional turbulence wind field of Runyang Suspension Bridge based on measured wind spectra[J].Journal of Southeast University(Natural Science Edition),2009,39(6). |
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| Authors: | Wang Hao Li Aiqun Xie Yishun Li Xingping |
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| Institution: | Wang Hao Li Aiqun Xie Yishun Li Xingping(Key Laboratory of Concrete , Prestressed Concrete Structures of Ministry of Education,Southeast University,Nanjing 210096,China) |
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| Abstract: | According to the structural styles and the vibration mode characteristics of long-span suspension bridges,and considering the correlation of natural wind,a digital simulation method for simplified 3-dimensional turbulence wind field is presented,which turns the 3-dimensional wind field on a plane into the 1-dimensional turbulence wind field on multi-lines.Combined with the spectral representation method and the fast Fourier transform(FFT)technique,the digital simulation of 3-dimensional turbulence wind fiel... |
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| Keywords: | suspension bridge structural health monitoring system ( SHMS) turbulence power spectrum wind field digital simulation spectral representation method |
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