基于微Stewart机构的盾鳞覆瓦式蒙皮减阻降噪特性研究

Stewart隔振系统能够十分显著地降低多维方向扰动源作用时机械振动及噪声的传递。潜器航行时表面所承受的多向水动力激励非常类似Stewart隔振系统工作时输入的多源扰动和激励。因此，申请人提出结合仿生盾鳞表面减阻降噪技术，将现有Stewart隔振系统微小化作为基底，构建一种基于微Stewart机构的盾鳞覆瓦式蒙皮结构，对其减阻降噪特性及机理进行全面系统的研究。.1.研究微Stewart机构盾鳞覆瓦式蒙皮对潜器表面流场的影响及湍流边界层多尺度相干结构控制机理。.2.研究微Stewart机构盾鳞覆瓦式蒙皮对湍流边界层脉动压力激励下潜器水动力噪声抑制机理及其吸声、隔声机理。.3.实验观测该蒙皮表面流场、声场及自身声学特性的相关数据，研究对比具有不同结构参数的蒙皮减阻降噪特性，为不同雷诺数下结构参数优化积累数据。.对这些关键问题的研究将为潜器减阻降噪技术领域新型结构与理论的发展应用做出探索。

Stewart vibration isolation system can significantly reduce the transmission of mechanical vibration and noise resulted from multi-directional disturbance sources, which is similar to the multi-directional hydrodynamic excitation on the submarine surface. Therefore, by miniaturizing Stewart vibration isolation systems as the base and combining the drag and noise reduction technology of bionic placoid scale surface, a skin imbricated with bionic placoid scale based on micro Stewartmechanism is proposed and the drag and noise reduction characteristics andmechanism of the skin will be investigated..(1) To research how the proposed skin influence the flow and the controlmechanism of the multi-scale coherent structure in the turbulent layer..(2) To research the mechanism of the soundabsorption, isolation and the suppression of the hydrodynamic noise due to fluctuating pressure excitation of the proposed skin..(3) To obtain the experimental data of the flow field, sound field and acoustic characteristics, and to optimize the structural parametersat various Reynolds number by comparing the drag and noise reduction effects of the proposed skin with various structural parameters..The research on these key issues will provide a guide for the development andapplication of the new structure and theory in the field of drag and noise reduction.