10MW 高温堆热气导管振动分析

根据１０ＭＷ高温气冷堆热气导管处于内外两股方向相反气流同时作用的具体结构特点，针对实际设计工况，建立了其流动诱发振动的理论模型，即两端简支，受内外两股方向相反气流同时作用的单管振动模型；给出了相应的数学描述和简捷求解方法；通过计算获得了其振动频率随流速的变化关系，和不同流动工况下，失稳时的临界流速，及相应的稳定性图。分析结果表明，热气导管的设计工况完全处于稳定区内，即其在设计工况下运行时，不会产生大振幅的流致振动。

Vibration analysis on the hot gas conduit in 10 MW HTR

Based on structural characteristics of the hot gas conduit for the high temperature gas cooled reatctor(HTR), which inside and outside is blown by the reverse direction two flows at same time. For design condition, this paper established the theoretical model to study flow induced vibration, that is a single span cylinder contained flowing gas and surrounded by reverse direction flow, simply supported at each end; showed the mathematical equations and the simple method to solute it; and obtained the frequency as a function of flow velocity, the critical velocity at which cylinder lost stability in variour flow conditions, and the stability map. The analysis results are that the design condition of hot gas conduit falls in the stability area, in other word, running at design condition, the flow induced large amplitude vibration doesn't exist.