肋片式换热器的有限元热应力分析

利用ANSYS有限元分析软件对肋片式换热器首先进行热分析,获得温度场温度扩展分布云图,得出温度在管道周围的值最大,最大值是78.76℃;通过定义路径分析了沿着肋片径向及管道高度内壁方向上的温度分布情况,得到相应的曲线和温度分布云图;之后在热分析的基础上,利用ANSYS软件中的间接法进行热应力分析,获得热应力的分布情况,最大热应力值发生在管道外壁与蒸汽管道连接部位,其值为40.19MPa;最后根据JB4732-95《钢制压力容器分析设计标准》进行相应的应力评定后,证明该肋片换热器是安全可靠的,可以应用在实际工程生产中。

Thermal stress analysis of fin type heat-exchanger based on finite element

In this paper, the ANSYS finite element software was applied to conduct thermal analysis on the fin type heat exchanger, the temperature expansion of temperature field contours was obtained, from the pictures it showed that at the round of pipe the temperature reached the maximum value, which was 78.76℃. Then by the path the temperature distributation radial direction and along the fin height of wall of the pipeline were analyzed to get the curve and the temperature contours, respectively. To obtain the distribution of thermal stress, at the basic of ther- mal analysis, the indirect method in ANSYS was applied for thermal stress analysis. Maximum thermal stress value was 40. 19MPa which occurred in the joints of steam pipe wall and pipe the obtained. At last depending on the An- alytical and Design Standard for Steel Pressured Vessels （JB4732-1995）, the assessment of the corresponding stress was analyzed. The result showed that the fin type heat exchanger was safe, it was proved that this type of heat-exchange can be satisfied in the practical engineering production. Through theories analysis and the result of finite-element analysis, it was proved that ANSYS software is acceptable and efficient. At the same time it provides the theories support to today＇s pressure vessel engineering.