浮筏系统已经成为舰船广泛使用的隔振手段，本文在传统浮筏结构基础上提出一种新结构，利用Isight集成有限元软件搭建优化平台对浮筏系统隔振性能进行优化，将声学黑洞和声子晶体引入浮筏系统来进一步提升其隔振性能。研究表明，新型浮筏结构拥有较优良的隔振性能，声学黑洞在高频段而声子晶体在设计带隙范围具有显著减振效果。附加声学黑洞结构的浮筏系统可减重9.4%，且使浮筏系统部分频段隔振性能提升2 dB；局域共振声子晶体引入浮筏系统可使其隔振性能提升3 dB左右，本文研究成果可为浮筏系统设计提供技术支持。
The floating raft system has become a widely used vibration isolation method for ships. This article proposes a new structure based on the traditional floating raft structure.Then it uses isight to integrate finite element software to build an optimization platform to optimize the vibration isolation performance of the floating raft system. Acoustic black holes and phononic crystals are applied on the floating raft system to further improve its isolation performance. Research has shown that the new floating raft structure has excellent vibration isolation performance.Acoustic black holes have vibration reduction effects in the high-frequency range meanwhile the phononic crystals perform significant vibration reduction effects in the band gap range. The floating raft system with additional acoustic black holes can reduce weight by 9.4% and improve the isolation performance of some frequency bands by 2 dB; The introduction of localized resonant phononic crystals into floating raft system enhances its isolation performance by almost 3 dB. The results of this paper can provide technical support for the design of floating raft systems.
2025,47(1): 14-17 收稿日期：2024-2-23
DOI：10.3404/j.issn.1672-7649.2025.01.003
分类号：TB535
作者简介：黄嘉业(1998-),男,硕士,研究方向为振动噪声控制
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