| 空间网格结构风振计算频域法的参数讨论及数值分析 |
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| 引用本文： | 邓华,李本悦. 空间网格结构风振计算频域法的参数讨论及数值分析[J]. 空间结构, 2004, 10(4): 36-43 |
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| 作者姓名： | 邓华 李本悦 |
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| 作者单位： | 浙江大学空间结构研究中心,浙江,杭州,310027;浙江大学空间结构研究中心,浙江,杭州,310027 |
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| 基金项目： | 国家自然科学基金资助项目(50108014). |
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| 摘 要： | 采用频域法进行空间结构的风振响应分析时,计算参数的合理确定依然存在不同的看法.文中结合对频域法计算过程的阐述,重点指出了直接影响计算结果的主要参数,包括参与组合振型的数量、振型耦合项的取舍、竖向脉动风效应、相关函数的选择和结构尼比等.文中系统回顾了这些参数确定的不同做法,并进行了分析和探讨.最后通过两个典型的空间网格结构(一球面网壳和一柱面网壳)算例分析,从数值的角度来说明这些参数不同取值对结构风振响应计算结果造成的差异.
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| 关 键 词： | 大跨度结构 网格结构 风致振动 频域 |
| 文章编号： | 1006-6578(2004)04-0036-08 |
| 修稿时间： | 2004-05-10 |
Discussion and numerical analysis on parameters of frequency-domain method in wind-induced vibration computation of spatial lattice structures |
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| DENG Hua,LI Ben-yue. Discussion and numerical analysis on parameters of frequency-domain method in wind-induced vibration computation of spatial lattice structures[J]. Spatial Structures, 2004, 10(4): 36-43 |
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| Authors: | DENG Hua LI Ben-yue |
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| Abstract: | Wind-induced vibration analysis of spatial lattice structures is still inconsistent in reasonable parameter determinations when using conventional frequency-domain method. The basic computational process of frequency-domain method is presented in order to highlight some parameters crucial to results of computation, including number of contributing modes, coupling terms between modes, vertical fluctuating components of wind, coherence function and structural damping ratio. Perspectives to the value determinations of those parameters are generally reviewed to reach an integral understanding for engineers. Two illustrative examples of typical spatial lattice structures, a spherical and a cylindrical lattice shells, are analyzed detailedly to show their numerical differences to responses of wind-induced vibration. |
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| Keywords: | long-span structure spatial lattice structure wind-induced vibration frequency domain |
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