摘要
水下航行器的隐身需求不断提高，机械振动噪声的控制显得更为重要。 本研究从传统金属底座出发，采用有限元仿真技术对金属底座的隔振性能进行评估，设计了复合材料底座和阻尼钢金属底座，模拟金属底座的结构类型。通过修改肋条结构实现复合材料底座隔振性能的优化，结合仿真结果和减重考虑确定基本结构形式。通过制作三种不同材料体系的底座模型，建立试验方法和评估标准，结果表明优化后的复合材料底座隔振性能优异，优于金属底座约4.7dB（10kHz以内）。本研究揭示了复合材料底座在水下航行器减振降噪方面的贡献，有助于复合材料底座在工程中的应用。
关键词： 金属底座；隔振性能；优化设计；复合材料底座
Abstract
The stealth needs of underwater vehicles are increasing, therefore the control of mechanical vibration noise becomes more important. Initiating from a conventional metallic base, this investigation employs finite element simulation techniques to assess the vibration isolation performance of a metallic base. Designed are composite material base and damping steel-metal base, mirroring the structural typology of metallic base. Optimization of the vibration isolation performance of the composite material base is achieved through the modification of the rib structure, determining the fundamental structural form by integrating simulation results with weight reduction considerations. Fabrication of base models using three distinct material systems, alongside the establishment of test methodologies and assessment standards, reveals that the optimized composite material base excels in vibration isolation performance, surpassing the metallic base by approximately 4.7 dB (within 10 kHz). This investigation reveals the contribution of composite bases in vibration and noise reduction for underwater vehicles, which contributes to the application of composite bases in engineering.
Key words： Metallic Bases; Vibration Isolation Performance; Optimization Design; Composite Material Base
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