Effect of welding residual stress on operating stress of nuclear turbine low pressure rotor

Tan Long; Zhao Liangyin; Zhao Pengcheng; Wang Lulu; Pan Jiajing; Zhao Xiuxiu

doi:10.1016/j.net.2020.01.026

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자료유형: 학술저널

저자정보: Tan Long (College of Electromechanical Engineering, Qingdao University of Science and Technology) Zhao Liangyin (College of Electromechanical Engineering, Qingdao University of Science and Technology) Zhao Pengcheng (College of Electromechanical Engineering, Qingdao University of Science and Technology) Wang Lulu (College of Electromechanical Engineering, Qingdao University of Science and Technology) Pan Jiajing (College of Electromechanical Engineering, Qingdao University of Science and Technology) Zhao Xiuxiu (Qingdao University of Science and Technology)

저널정보: 한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제52권 제8호

발행연도: 2020.8

수록면: 1,862 - 1,870 (9page)

DOI: 10.1016/j.net.2020.01.026

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The purpose of this study is to investigate the effect of welding residual stress on operating stress in designing a nuclear turbine welded rotor. A two-dimensional axisymmetric finite element model is employed to calculate the residual stress before and after post weld heat treatment (PWHT), and then the superposition of residual stress after PWHT and operating stress at normal speed and overspeed were discussed. The investigated results show that operating stress can be affected significantly by welding residual stress, and the distribution trend of superposition stress at the weld area is mainly determined by welding residual stress. The superposition of residual stress and operating stress is linear superposition, and the hoop stress distribution of superposition stress is similar with the distribution of residual stress. With the increasing overspeed, the distribution pattern of the hoop superimposed stress remains almost unchanged, while the stress level increases

#Finite element analysis #Residual stress #Operating stress #Nuclear turbine rotor

참고문헌 (30)

참고문헌 신청

W. Choi / 2012 / Development of thermal stress concentration factors for life assessment of turbine casings / Int. J. Pres. Ves. Pip 98:1~7

C. Liu / 2019 / Residual stress in a restrained specimen processed by post-weld ultrasonic impact treatment / Sci. Technol. Weld. Join 24(3):193~199

R. K. Shiue / 2004 / The effect of residual thermal stresses on the fatigue crack growth of laser-surface-annealed AISI 304stainless steel: Part I: computer simulation / Mater. Sci. Eng., A 364:101~108

C. Mattias / 2004 / High Strength Steel Local Buckling and Residual Stresses / Lulea University of Technology: Department of Civil and Environmental Engineering

C. F. Ding / 2005 / Analysis of residual stress influencing on safety of steam turbine / Mater. Sci. Forum 490:481~484

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