锅炉技术2025，Vol.56Issue(2)：66-70,5.
基于残余应力测试与仿真的电站锅炉包墙过热器开裂分析
Cracking Analysis of Wall Wrapped Superheater in Thermal Power Plant Based on Residual Stress Measurement and Simulation
摘要
Abstract
The leakage of the wall wrapped superheater has posed a hidden danger to the safe and stable operation of thermal power plant,and the failure analysis of the fin in the wall wrapped superheater is helpful to optimise the structure of the wall wrapped superheater.In the present paper,the residual stress of joint weld was tested by using X-ray diffraction,combining with finite element simulation,the reasons for the cracking of wall wrapped super-heater were analysed,and the results show that the joint fins are subjected to compressive stress with a maximum value of approximately-240 MPa,while both side are subjected to tensile stress,with a maximum of around 430 MPa,and the local high stress concentration in the fin weld is the main reason for the cracking of the fins.The finite element method was used to simulate the stress distribution during the operation of thermal power plant,and the simulation results show that the thermal stresses caused by the temperature difference be-tween the horizontal flue and tail flue of the thermal power plant resulted in local high stres-ses at the fin welds,which led to the cracking of wall wrapped superheater.The measured residual stresses are in good agreement with the calculated values from the finite element sim-ulation.关键词
包墙过热器/残余应力/有限元模拟Key words
wall wrapped superheater/residual stress/finite element simulation分类
能源科技引用本文复制引用
朱玉策,崔益民,董旭光,黄炜强,王贤明,赵宁宁,闾川阳,楼玉民..基于残余应力测试与仿真的电站锅炉包墙过热器开裂分析[J].锅炉技术,2025,56(2):66-70,5.基金项目
浙能集团科技项目(ZNKJ-2022-010) （ZNKJ-2022-010）
