【摘要】 为了提升新一代核电阀门工程应用的可靠性，建立了高温调节阀有限元模型，对调节阀进行了稳态热力耦合计算以及蠕变数值模拟，在分析ASME NB和NH分卷中的热力学强度评定方法的基础上对调节阀进行了强度评定。发现温度梯度大是造成调节阀热应力集中的主要原因。调节阀服役30万h时阀体最大蠕变应力值为43.9 MPa，蠕变应变值为0.91%，蠕变损伤值为0.1，结合标准和材料蠕变性能试验数据，发现阀体在30万h设计寿命下不会发生蠕变强度失效。本文为第四代核电高温调节阀的高温结构完整性设计提供了计算方法。更多还原

【Abstract】 In order to enhance the reliability of the new generation of nuclear power valves in engineering applications,a finite element model of a new-type high temperature regulating valve was developed. The steady-state thermal coupling calculation and numerical analysis of creep of the regulating valve were carried out,and the strength of the regulating valve was assessed based on the analysis of strength assessment methods in ASME NB and NH sub-volumes. It is found that the large temperature gradient is the main cause of thermal stress concentration in the regulating valves. The maximum creep stress value is 43.9 MPa,the creep strain value is 0.91%,and the creep damage value is 0.1 for the valve which has been operating for 300 000 hours,and according to the ASME code and material creep performance experiments,it is found that the valve body will not experience creep strength failure at 300 000 hours design life. This study provides a calculation method for high temperature structural integrity of the fourth generation of nuclear power high-temperature regulating valves.更多还原