【摘要】：跨介質(zhì)運動物體具備能夠適應(yīng)多種流體介質(zhì)環(huán)境的突出優(yōu)勢,但由于受自由面及流體影響,力學(xué)環(huán)境復(fù)雜,其運動特性難以預(yù)測。附加質(zhì)量法是工程上解決物體與流體耦合問題的常用方法,但現(xiàn)有的附加質(zhì)量結(jié)論無法直接推廣到帶自由面問題的跨介質(zhì)過程。針對跨介質(zhì)過程的時變附加質(zhì)量問題,提出了一種新的求解方法,研究了不同浸深時某柱體外形跨介質(zhì)過程中出水階段和入水階段的附加質(zhì)量變化規(guī)律。結(jié)論表明:出水階段和入水階段的附加質(zhì)量隨浸深的變化趨勢一致,曲線相似;相同浸深狀態(tài)時出水階段和入水階段的法向附加質(zhì)量相近,線性特征明顯;相同浸深狀態(tài)時出水階段和入水階段的軸向附加質(zhì)量、附加轉(zhuǎn)動慣量和附加靜距差距明顯,2個過程不可逆。本文所提出的方法可為各類跨介質(zhì)結(jié)構(gòu)體設(shè)計提供技術(shù)支持,也可推廣至其他帶自由面問題的附加質(zhì)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.
【作者單位】： 空軍工程大學(xué)航空航天工程學(xué)院;中國人民解放軍95889部隊;
【基金】：國家“863”計劃~~
【分類號】：O35

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