随着船舶工业技术的快速发展，对动力系统隔振装置提出了更加苛刻的要求，现有的橡胶阻尼材料虽然具备良好的减振效果，但仍然存在着质量大、力学承载性能和吸能性能不足等问题，针对上述背景，本文将橡胶阻尼材料与力学性能优异的碳纤维圆管相结合设计出了一种兼具轻质、抗冲、隔振的碳纤维圆管增强超弹多孔结构，并在前期的研究中已验证了该结构具有优异的抗冲吸能表现。在此基础上，通过试验结合数值表征的方法研究了该结构的振动行为和减振性能，揭示碳纤维圆管对结构固有振动特性和减振性能的影响规律。结果发现，相比无增强结构，填充碳纤维圆管的超弹多孔结构可在增强结构整体刚度的同时实现减振性能的显著提升；试验结果验证了所建立结构数值模型的可靠性，对比不同增强结构的仿真与试验发现随着碳纤维圆管厚度的增加，结构固有频率呈现先增大后减小的趋势；研究结果可为设计新型轻质高刚度高阻尼结构提供参考。
Abstract
With the rapid development of shipbuilding industry technology, the power system vibration isolation device put forward more stringent requirements, although the existing rubber damping material has a good vibration damping effect, but there are still problems such as large mass, mechanical bearing performance and insufficient energy absorption performance, in view of the background of the appeal, this paper combines rubber damping material with excellent mechanical properties of carbon fiber round tube to design a carbon fiber round tube reinforced super-elastic porous structure with both light weight, impact resistance and vibration isolation. In previous studies, it has been verified that the structure has excellent impact absorption performance. On this basis, the vibration behavior and damping performance of the structure are studied by experimental and numerical characterization, and the influence of carbon fiber round tube on the inherent vibration characteristics and damping performance of the structure is revealed. The results show that compared with the unreinforced structure, the super-elastic porous structure filled with carbon fiber round tube can significantly improve the vibration damping performance while enhancing the overall stiffness of the structure. The experimental results verify the reliability of the established numerical model of the structure, and compare the simulation and test of different reinforced structures and show that with the increase of the thickness of the carbon fiber round tube, the natural frequency of the structure first increases and then decreases. The research results can provide a reference for the design of new lightweight, high-stiffness and high-damping structures.
关键词
多孔结构 /
碳纤维圆管 /
聚氨酯 /
振动 /
阻尼
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Key words
porous structure /
carbon fiber round tube /
polyurethane /
vibration /
damping
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