摘要
借助Ansys软件对公称通径DN25mm、工作压力1MPa的超低温LNG截止阀在温度应力耦合场下进行数值模拟,并对所得热应力分析结果与同条件静力分析结果和不同类型阀门的热应力分析结果做比对。结果表明:低温截止阀在工作状态下,其温度场呈自阀体沿阀颈轴线方向向上温度逐渐升高的趋势;阀体的热应力分布主要集中在与管道连接的部位;阀门在温度应力耦合场作用下的应力集中现象要强于静力场单独作用;不同低温阀门在工作状态下时,与管道连接部位都会出现应力集中现象。
The Ansys was used to analyze thermal stress of the cryogenic globe valves（DN25mm, 1 MPa） used in LNG tanks. Comparing thermal stress and static stress shows that the temperature rises gradually along the direction from the valve body to neck＇ s axis and the valve body＇ s thermal stress concentrates at the connection part with the pipeline ; the valve＇ s stress concentration under the temperature-stress field is much more obvious than that in static stress field and the stress concentration at the connection position with pipelines can be seen in different cryogenic valves.
出处
《化工机械》
CAS
2015年第5期701-705,共5页
Chemical Engineering & Machinery
关键词
LNG
低温截止阀
安全服役性能
温度应力耦合
热应力
cryogenic globe valve for LNG tank, security performance in service, temperaturestress cou-pling, thermal stress
