APPLICATION OF MEAN STRESS CORRECTION METHOD IN SHAFTING STRESS CALCULATION FOR TURBO-GENERATOR SET

GUO Jialei; PANG Le Huadian Electric Power Science Research Institute

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APPLICATION OF MEAN STRESS CORRECTION METHOD IN SHAFTING STRESS CALCULATION FOR TURBO-GENERATOR SET

Thermal Power Generation Vol. 41, Issue 2, Pages: 68-71(2012)

更新时间：2025-09-28

- APPLICATION OF MEAN STRESS CORRECTION METHOD IN SHAFTING STRESS CALCULATION FOR TURBO-GENERATOR SET
- 作者机构：
  
  华电电力科学研究院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM311
- Published：2012
- 稿件说明：
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GUO Jialei, PANG Le Huadian Electric Power Science Research Institute. APPLICATION OF MEAN STRESS CORRECTION METHOD IN SHAFTING STRESS CALCULATION FOR TURBO-GENERATOR SET[J]. Thermal Power Generation, 2012, 41(2): 68-71.
DOI：

GUO Jialei, PANG Le Huadian Electric Power Science Research Institute. APPLICATION OF MEAN STRESS CORRECTION METHOD IN SHAFTING STRESS CALCULATION FOR TURBO-GENERATOR SET[J]. Thermal Power Generation, 2012, 41(2): 68-71. DOI：

摘要

分析了寿命当量法和损伤当量法修正平均应力效应的机理

给出了损伤当量法的平均应力修正公式。以低-发联轴器材料26Cr2Ni4MoV钢为例

利用有限元法(ANSYS软件)计算了变幅和等幅非对称扭应力载荷下危险截面的疲劳损伤情况。结果表明

在计算恒幅非对称循环载荷下疲劳寿命损伤时

2种方法计算精度相差无几;在计算复杂载荷下疲劳寿命损伤时

用平均应力效应的损伤当量法能显著提高疲劳寿命估算精度。

Abstract

The mechanism of corrected mean stress effect in life equivalent method and in damage equivalent method has been analysed

a correction formula for calculating the mean stress in damage equivalent method being given.Taking material of coupling between the low-pressure cylinder and generater

i.e.the 26Cr2Ni4MoV steel

as an example

the fatigue damage of dangerous section under asymmetric loading of constant amplitude and non-constant amplitude has been calculated by using the finite-element method(ANSYS software).In the event of calculating the fatigue life damage under symmetric cyclic loading of constant amplitude

the difference between calculating precision of two said mehtods is slight

but in the case of caculating fatigue life damage under complex loading

the damage equivalent method with mean stress effect can substantially enhance the evaluation precision of the fatigue life damage.

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