含局部谐振器的双层隔振结构振动特性分析及试验验证
PDF下载 (47)蔡紫晴,陈跃华,张 崇,郑佳晖.含局部谐振器的双层隔振结构振动特性分析及试验验证[J].宁波大学学报(理工版),2026,39(2):42-52.DOI:10.20098/j.cnki.1001-5132.2025.1101
Cai Ziqing,Chen Yuehua,Zhang Chong,Zheng Jiahui.Vibration characteristics analysis and experimental verification of a double-layer vibration isolation structure with local resonators[J].Journal of Ningbo University(Natural Science & Engineering Edition),2026,39(2):42-52.DOI:10.20098/j.cnki.1001-5132.2025.1101
| Title: | Vibration characteristics analysis and experimental verification of a double-layer vibration isolation structure with local resonators |
| 作者: | 蔡紫晴, 陈跃华, 张 崇, 郑佳晖 |
| Author(s): | Cai Ziqing, Chen Yuehua, Zhang Chong, Zheng Jiahui |
| 关键词: | 双层隔振结构; 局部谐振器; Chebyshev-变分法; 振动特性 |
| Keywords: | double-layer vibration isolation structure; local resonator; Chebyshevvariational method; vibration characteristics |
| 分类号: | TB535 |
| DOI: | 10.20098/j.cnki.1001-5132.2025.1101 |
| 文献标识码: | A |
| 摘要: | 为研究船舶动力装置隔振结构的振动隔离效果，提出了一种含局部谐振器的双层隔振结构理论模型。基于Chebyshev-变分原理，推导了局部谐振器能量泛函，获得了含局部谐振器的双层隔振结构理论解；研究了谐振器位置、边界条件及耦合连接器参数等对系统振动特性的影响，开展了隔振性能优化分析；搭建了双层隔振系统试验平台，理论结果与试验结果的良好吻合验证了理论模型的有效性。结果表明：局部谐振器的存在明显丰富了双层隔振结构的隔振频点；边界约束的逐步增强驱动振动响应峰值向高频移动；对耦合连接器参数优化后，在20Hz到300Hz频率范围内平均位移响应由37.63dB降至35.92dB。 |
| Abstract: | In order to study the vibration isolation effect of vibration isolation structure of ship power plant, this paper proposes a theoretical model of double-layer vibration isolation structure with local resonators. Based on Chebyshev-variational principle, the energy functional of the local resonator is derived, and the theoretical solution of the double-layer vibration isolation structure with local resonators is obtained. The effects of resonator position, boundary conditions and coupling connector parameters on the vibration characteristics of the system are studied, and the optimization analysis of vibration isolation performance is carried out. An experimental platform of two-layer vibration isolation system is also built. It showed good agreement between the theoretical results and the experimental ones, verifying the validity of the theoretical model. The results demonstrated that the existence of local resonators obviously enriches the vibration isolation frequency points of the double-layer vibration isolation structure; the gradual enhancement of boundary constraints drives the peak value of vibration response to move to high frequency. Further on, after optimizing the parameters of the coupling connector, the average displacement response is reduced from 37.63dB to 35.92dB in the frequency range of 20Hz to 300Hz. |
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| 备注/Memo: | 收稿日期：2025-11-03 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ 基金项目：船舶热能动力全国重点实验室开放基金（TPL2024A03） 第一作者：蔡紫晴，硕士研究生，主要研究方向为船舶振动控制。E-mail: 2311120024@nbu.edu.cn *通信作者：陈跃华，博士/教授，主要研究方向为船舶结构振动噪声预报。E-mail: chenyuehua@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
