Optimization Design and Experimental Research of Composite Material Bases for Marine Applications

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.