130t/h 锅炉汽包凹槽浅插式接管结构应力分析及疲劳寿命估算(一)

Stress Analysis and Fatique Evaluation a FillerWelded Nozzle in a 130t/h Boiler Drum (Ⅰ)

本文针对中压锅炉汽包凹槽浅插式接管的特殊结构，以１３０ｔ／ｈ锅炉汽包１０８×４．５ｍｍ接管为例，通过分析研究提出了凹槽浅插式接管与汽包筒身交接部位纵剖面应力分布的简化理论，进行了接管部位的有限元计算，并参考应变－应力的实际电测结果，综合确定接管区域危险部位的应力状况。

In this paper,considering the special structure of slightly inserted and fillet welded nozzles,on the basis of analyzing and simplifying a nozzle (Φ108×4 5mm) zone in a 130 t/h boiler drum,an approximare method of calculating this kind of nozzle-zone longitudinal section stress was introduced.Moreover,a mechanics model was established and the finite element calculation was accomplished.