【作者】 李启明； 唐忠锋； 傅远； 王纳秀；

【Author】 LI Qiming TANG Zhongfeng FU Yuan WANG Naxiu (Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China)

【机构】 中国科学院上海应用物理研究所；

【摘要】 利用ANSYS软件建立了冷冻阀的三维有限元模型,对其关闭状态和开启过程进行了热—结构分析研究。结果表明:1)冷冻阀的扁平部位由于内部空间熔盐少,熔盐熔融和冻结容易控制,是实现开关功能和熔盐堆过热安全泄放的核心部位;2)获得了不同因素(如换热系数、加热功率、保温尺寸等)对冷冻阀在关闭状态与开启过程中的温度场及应力大小的影响规律,为冷冻阀的优化设计及安全运行管理提供了依据;3)由于初始模型中部分设计不合理(如保温尺寸和加热功率等),导致冷冻阀热应力过高,容易引起疲劳损伤,经分析优化和改进后,最大热应力明显减小,综合性能得到很大提高。更多还原

【Abstract】 A 3D Finite Element model, which the thermal-structural coupling method was used, was established by the ANSYS software to analyze the performances and the properties of a Freeze-Valve. The analysis result shows that the flat part of the Freeze-Valve plays a very important role in engineering applications. Obtained the law of different factors (heat transfer coefficient, heating power, and insulation size and so on) affecting the temperature and the stress field of the Freeze-Valve during operation provides some basis for optimization of design and safe operation. The thermal stress of the initial model of the Freeze-Valve is so large that to easily cause fatigue failure, owing to the unreasonable initial design (insulation size and heating power, for example). After analysis and structural optimization, the maximum stress of the Freeze-Valve is significantly reduced, and the performance has been greatly improved.更多还原