跨介质运动物体的附加质量
发布时间：2019-01-22 09:39
【摘要】：跨介质运动物体具备能够适应多种流体介质环境的突出优势,但由于受自由面及流体影响,力学环境复杂,其运动特性难以预测。附加质量法是工程上解决物体与流体耦合问题的常用方法,但现有的附加质量结论无法直接推广到带自由面问题的跨介质过程。针对跨介质过程的时变附加质量问题,提出了一种新的求解方法,研究了不同浸深时某柱体外形跨介质过程中出水阶段和入水阶段的附加质量变化规律。结论表明:出水阶段和入水阶段的附加质量随浸深的变化趋势一致,曲线相似;相同浸深状态时出水阶段和入水阶段的法向附加质量相近,线性特征明显;相同浸深状态时出水阶段和入水阶段的轴向附加质量、附加转动惯量和附加静距差距明显,2个过程不可逆。本文所提出的方法可为各类跨介质结构体设计提供技术支持,也可推广至其他带自由面问题的附加质量求解中。
[Abstract]:Cross-media moving objects have the advantages of being able to adapt to a variety of fluid media environments. However, due to the influence of free surface and fluid, the mechanical environment is complex, and its motion characteristics are difficult to predict. The method of additional mass is a common method to solve the problem of coupling between body and fluid in engineering, but the existing conclusion of additional mass can not be directly extended to the cross-medium process with free surface problem. In order to solve the problem of time-varying additional mass in cross-medium process, a new solution method is proposed, and the law of the variation of additional mass in the water and inlet stages of the cross-medium process with different dipping depth is studied. The results show that the variation trend of the additional mass with the leaching depth is the same and the curve is similar, and the normal additional mass of the effluent stage and the inflow stage are similar, and the linear characteristics are obvious. Under the same immersion condition, the axial additional mass, the difference between the additional moment of inertia and the additional static distance are obvious, and the two processes are irreversible. The method proposed in this paper can provide technical support for the design of various cross-dielectric structures, and can also be extended to solve other problems with free surface.
【作者单位】： 空军工程大学航空航天工程学院;中国人民解放军95889部队;
【基金】：国家“863”计划~~
【分类号】：O35
本文编号：2413092
[Abstract]:Cross-media moving objects have the advantages of being able to adapt to a variety of fluid media environments. However, due to the influence of free surface and fluid, the mechanical environment is complex, and its motion characteristics are difficult to predict. The method of additional mass is a common method to solve the problem of coupling between body and fluid in engineering, but the existing conclusion of additional mass can not be directly extended to the cross-medium process with free surface problem. In order to solve the problem of time-varying additional mass in cross-medium process, a new solution method is proposed, and the law of the variation of additional mass in the water and inlet stages of the cross-medium process with different dipping depth is studied. The results show that the variation trend of the additional mass with the leaching depth is the same and the curve is similar, and the normal additional mass of the effluent stage and the inflow stage are similar, and the linear characteristics are obvious. Under the same immersion condition, the axial additional mass, the difference between the additional moment of inertia and the additional static distance are obvious, and the two processes are irreversible. The method proposed in this paper can provide technical support for the design of various cross-dielectric structures, and can also be extended to solve other problems with free surface.
【作者单位】： 空军工程大学航空航天工程学院;中国人民解放军95889部队;
【基金】：国家“863”计划~~
【分类号】：O35
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