将带阻尼黑洞结构嵌入舱壁面，构建出基于黑洞聚能的海洋平台新型声振抑制方法。首先研究了弯曲波在黑洞结构中的反射特性，基于几何声学原理分析了截断位置、阻尼厚度、阻尼弹性模量、激励频率对聚能效果的影响规律，研究表明近80%的结构动能被俘获在本文黑洞结构中心0.16 m范围内，且扩大黑洞中心均匀厚度区域面积对提升聚能效果具有积极作用。为解决工程计算内存过载问题，提出并验证了带阻尼黑洞结构的工程2D化计算方法，进而基于模态分析结合拓扑优化方法确定了黑洞结构嵌入最佳位置。研究表明，该声振抑制方法可降低舱室噪声约40 dB、结构噪声约45 dB，相比全舱壁敷设阻尼约有7、15 dB的提升，并可满足GJB4.8颠振二级寿命要求。
A novel acoustic and vibration suppression method for offshore platform based on black hole gathering energy was constructed by embedding a damped black hole structure into the bulkhead surface. Firstly, the reflection characteristics of curved wave in the black hole structure are studied. The influence laws of truncation position, damping thickness, damping elastic mode and excitation frequency on the energy gathering effect are analyzed based on the principle of geometric. The research shows that nearly 80% of the structural kinetic energy is captured within 0.16m of the black hole structure center in this paper, and expanding the average thickness area of the center of the black hole will significantly improve the energy gathering effect. Furthermore, the 2D engineering calculation method of damped black hole structure is proposed and verified, which solves the problem of engineering computing memory overload. Finally, the optimal location of black hole structure embedding is determined based on model analysis and topology optimization. The results shows that the acoustic and vibration suppression method can reduce cabin noise by about 40 dB and structure noise about 45 dB,which is about 7 dB and 7 dB higher the damping of full bulkhead installation, and it can meet the secondary flutter life requirements of GJB4.8.
2025,47(17): 33-38 收稿日期：2024-11-2
DOI：10.3404/j.issn.1672-7649.2025.17.006
分类号：TB535
作者简介：闫森森(1992-),男,硕士,工程师,研究方向为振动噪声控制
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