| 崔承勋.非对称圆环拍的特性研究[J].实验力学,2010,25(5):604~610 |
| 非对称圆环拍的特性研究 |
| On the Beat Characteristics of an Asymmetric Ring |
| 投稿时间：2010-03-05 修订日期：2010-05-10 |
| DOI： |
| 中文关键词: 微小非对称圆环 冲击响应 拍现象 拍的分布图 |
| 英文关键词:slightly asymmetric ring impulse response beat phenomenon beat diagram |
| 基金项目: |
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| 中文摘要: |
| 建立微小非对称圆环点冲击下拍的理论模型，通过实验验证其有效性。微小非对称圆环是分析大钟拍现象的简化模型，微小非对称圆环的每一对径向振动模态的固有频率非常接近，这对模态互相干涉下出现拍现象。最后利用拍的理论模型绘制沿圆周拍的分布图，详细分析拍的分布特性，为校正钟的拍频声提供理论依据。 |
| 英文摘要: |
| Analytical model of the beat response was derived for a slightly asymmetric ring and the model was verified experimentally. Asymmetric ring is a simplified model used to explain the beat property of a bell. For an asymmetric ring, every pair of radial vibration mode has only slightly different inherent frequency. Interference of two close frequency components of mode produces beat phenomenon. Beat diagrams were plotted and beat characteristics on the circumference were explained in detail based on the analytical model. The proposed analytical model can be used to control the beat characteristics of a bell, which has similarity in the beat of pair mode. |
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