| 叶轮扭振引发离散气动噪声理论计算模型研究 |
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| 引用本文： | 伍先俊,朱石坚,李志明.叶轮扭振引发离散气动噪声理论计算模型研究[J].机械科学与技术(西安),2004,23(3):278-280. |
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| 作者姓名： | 伍先俊 朱石坚 李志明 |
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| 作者单位： | 海军工程大学振动与噪声研究所 武汉430033
(伍先俊，朱石坚)，武汉理工大学 武汉430070(李志明) |
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| 基金项目： | 中国汽车工业总公司博士点基金项目 |
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| 摘 要： | 对叶轮振动模态进行分析 ,表明由于叶片刚度远小于轮毂的刚度 ,叶轮振动以叶片振动为主 ,而叶片振动低频表现为扭摆振动 ,高频表现为表面弯曲波振动。低频振动对叶轮气动噪声影响很大 ,本文基于Lowson离散噪声模型对叶片扭振引发离散气动噪声声压的估算公式进行了推导 ,为工程应用提供了方便
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| 关 键 词： | 叶轮 振动模态 噪声 |
| 文章编号： | 1003-8728(2004)03-0278-03 |
A Method for Estimating Blade Swing Induced Discrete Aerodynamic Noise |
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| WU Xian-jun ,ZHU Shi-jian ,LI Zhi-ming.A Method for Estimating Blade Swing Induced Discrete Aerodynamic Noise[J].Mechanical Science and Technology,2004,23(3):278-280. |
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| Authors: | WU Xian-jun ZHU Shi-jian LI Zhi-ming |
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| Affiliation: | WU Xian-jun 1,ZHU Shi-jian 1,LI Zhi-ming 2 |
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| Abstract: | This paper gives an analysis of turbine vibration modes. The results indicate that the main vibrating parts of the turbine are the blades because blade rigidity is much smaller than hub rigidity. The low frequency vibrations of the blade are the blade swings and the high frequency vibrations are the blade twist waves. The low frequency vibrations have more influences on turbine noise than high frequency vibrations. For convenience of opplication the formula to estimate the vibration induced aerodynamic noise SPL(Sound Pressure Level) based on Lowson theory is deduced. |
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| Keywords: | Turbine Vibration mode Noise |
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