| 障板上矩形薄板在浅水环境中的振动及声辐射解析分析 |
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| 引用本文： | 孙瑶,沈那伟,包振明,杨铁军. 障板上矩形薄板在浅水环境中的振动及声辐射解析分析[J]. 振动与冲击, 2020, 39(9): 242-247 |
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| 作者姓名： | 孙瑶 沈那伟 包振明 杨铁军 |
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| 作者单位： | 1.江苏科技大学 能源与动力学院，江苏 镇江212000； 2.哈尔滨工程大学 动力与能源工程学院，哈尔滨150001 |
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| 基金项目： | 国家自然科学基金(51809125);江苏省自然科学基金(BK20170568)。 |
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| 摘 要： | 通过推导得到浅水环境中矩形板声辐射阻抗矩阵的解析表达,进一步结合振动假设模态方法及辐射表面单元辐射器思想求解浅水环境中矩形板的振动响应,分析水深对矩形板模态附加质量的影响,给出矩形板模态附加质量随水深的变化情况,得到波导模态的激发对附加质量的影响,并通过对辐射抗矩阵的特征分析得到附加质量在板上分布的主要模式;进一步结合声辐射模态辐射效率,分析水深变化对矩形板振动响应峰值及远场声辐射的影响,分析结果表明:水深度变化对振动响应峰值及声辐射功率的影响与第1阶声辐射模态的辐射效率随深度的变化具有一致性。
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| 关 键 词： | 浅水环境 矩形板振动 声辐射 |
Theoretical analysis on the vibration and sound radiation of a rectangular plate facing finite depth of water |
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| SUN Yao,SHEN Nawei,BAO Zhenming,YANG Tiejun. Theoretical analysis on the vibration and sound radiation of a rectangular plate facing finite depth of water[J]. Journal of Vibration and Shock, 2020, 39(9): 242-247 |
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| Authors: | SUN Yao SHEN Nawei BAO Zhenming YANG Tiejun |
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| Affiliation: | 1.School of Power and Energy, Jiangsu University of Science and Technology, Zhenjiang 212000, China;2.College of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, China |
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| Abstract: | The sound radiation impedance matrix of a rectangular plate facing shallow water was derived analytically. By the eigen-value decomposition technique, the sound radiation modes and their radiation efficiencies were obtained and used to study the sound radiation characteristics of the plate in shallow water.The effect of water depth on the sound radiation and modal added mass was discussed.The results show that underwater natural frequencies of the plate are related to the distribution of added mass while the variation of radiation efficiencies of radiation modes in different depth of water will influence the sound radiation. |
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| Keywords: | shallow water vibration of plate sound radiation |
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