摘要
以某固定管板釜式再沸器为例,忽略局部结构,建立整体应力分析模型,利用ANSYS软件对各工况下的应力进行了计算;同时,仅取设备壳程筒体建立局部应力分析模型,对比分析了斜锥最大倾角路径上的轴向应力和薄膜应力。结果显示:前者的最大应力强度位于斜锥大端内壁处,而后者的最大应力强度位于斜锥小端外壁处;对比同时表明采用整体模型分析所得斜锥各项应力强度水平均远低于局部模型分析结果,以此为基础进行设计可大大降低斜锥壁厚。
Exampled with one fixed tubesheet kettle-type reboiler, an integral stress analysis model, in which local structure had been ignored, was established. By using ANSYS software, the stresses in various working conditions were calculated. Then, a partial stress analysis model was built, in which only shell side cylinder was included. The longitudinal stress and membrane stress in maximum inclination route were calculated and analyzed. It was shown that maximum longitudinal stress is at inner surface of large end of offset cone and maximum membrane stress is at outer surface of small end of offset cone. It was also shown from the comparison that all the stresses resulted from the integral model were greatly less than that resulted from the partial model. Thus, it can be expected that the thickness of offset cone will be decreased when it is designed based on integral model.
出处
《化工设备与管道》
CAS
2014年第4期15-18,22,共5页
Process Equipment & Piping
基金
江苏连云港年产150吨PTA项目(ML5001113)
关键词
釜式再沸器
斜锥壳
有限元法
应力分析
kettle-type reboiler
offset conical shell
limit element method
stress analysis
