某堆舱贯穿件应力评定方法研究

Study on Stress Evaluation Method of a Reactor Compartment Penetration

文中针对某堆舱贯穿件接管载荷加载方式、应力评定进行了分析和比较,通过ANSYS APDL语言,采用体单元建立贯穿件参数化模型,对其进行热力分析,研究了某贯穿件在不同接管载荷加载方式和不同剖面下的应力分布规律.分析结果表明,同一危险路径下,不同剖面的应力分量结果最大相差90%,不同加载方式的应力分量结果最大相差79%,接管载荷加载方式和应力评定剖面的选取对的应力分量影响显著.在贯穿件设计时,需要着重考虑危险加载方式下的最大应力剖面.

The loading mode and stress evaluation position of the nozzle load of a reactor compartment penetration were analyzed and compared.Through ANSYS APDL language,the parametric model of penetrations was established by volume element,and its thermal analysis was carried out,and the stress distribution law of penetrations under different nozzle loading modes and different sections was studied.The results show that,under the same dangerous path,the maximum difference of stress component results of different sections is 90%,and the maximum difference of stress component results of different loading methods is 79%.The selection of nozzle load loading method and stress evaluation section has significant influence on the stress component.When designing penetrations,it is necessary to consider the maximum stress profile under dangerous loading.