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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。
According to the specific structural characteristics of the simultaneous hot and cold gas heat pipe in 10 MW HTR both in and out, the theoretical model of flow induced vibration is established according to the actual design conditions, that is, the two ends are simply supported, The single-tube vibration model with simultaneous action of gas flow and gas flow, the corresponding mathematical description and simple solution method are given. The relationship between the vibration frequency and the flow rate is obtained through calculation, and the critical flow velocity under different flow conditions, The stability of the map. The analysis results show that the design condition of the hot gas duct is completely in the stable zone, that is, it does not produce the large amplitude flow-induced vibration when it operates under the design conditions.