| 湍流激励下结构振动特性的半解析半数值算法研究 |
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| 引用本文： | 陈美霞,魏建辉,乔志,李飘. 湍流激励下结构振动特性的半解析半数值算法研究[J]. 振动工程学报, 2011, 24(6) |
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| 作者姓名： | 陈美霞 魏建辉 乔志 李飘 |
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| 作者单位： | 华中科技大学船舶与海洋工程学院,湖北武汉,430074 |
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| 基金项目： | 国家自然科学基金资助项目(50805055) |
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| 摘 要： | 提出了一种基于随机激励理论计算结构在湍流激励下振动特性的半解析半数值算法.对经典的corcos模型给出的湍流脉动压力功率谱密度表达式进行离散碍到湍流脉动压力功率谱密度矩阵作为输入,采用有限元边界元数值算法计算出考虑流固耦合作用时结构的频响函数矩阵,进而结合随机理论计算出结构在湍流激励下速度响应的功率谱密度矩阵,同已有文献中解析法计算结果吻合较好,证明了计算方法的正确性.之后,将本文计算方法应用到湍流激励下单层圆柱壳振动特性的计算研究.结果表明:半解析半数值方法将经典的corcos模型和有限元边界元数值算法相结合,能够很好解决一些外形规则内部结构复杂的工程问题,具有较强的工程应用价值.
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| 关 键 词： | 随机激励理论 湍流边界层 半解析半数值法 |
Semi-analytical and semi-numerical method for calculating the vibration characteristics of structure excited by turbulent boundary layer |
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| CHEN Mei-xia
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WEI Jian-hui
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QIAO Zhi
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LI Piao. Semi-analytical and semi-numerical method for calculating the vibration characteristics of structure excited by turbulent boundary layer[J]. Journal of Vibration Engineering, 2011, 24(6) |
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| Authors: | CHEN Mei-xia
WEI Jian-hui
QIAO Zhi
LI Piao |
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| Affiliation: | CHEN Mei-xia,WEI Jian-hui,QIAO Zhi,LI Piao(College of Naval Architecture and Ocean Engineering,Huazhong Universityof Science and Technology,Wuhan 430074,China) |
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| Abstract: | A semi-analytical and semi-numerical method for calculating the vibration characteristic of structure excited by turbulent boundary layer based on random excitation theory is presented.The power spectra density expression of the excitation caused by turbulent boundary layer given by Corcos is dispersed into matrix form as input.Combined with the frequency response function matrix considering fluid-structure interaction calculated by FEM/BEM methods,the power spectral density of the structure velocity is cal... |
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| Keywords: | random excitation theory turbulent boundary layer semi-analyitical and semi-numerical |
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