LIFE ANALYSIS OF LOW SPEED DIESEL ENGINE BEDPLATE BASED ON CRACK GROWTH

ZHANG ZhiYong; CUI Yi; WANG Yi; YAN XinYi; YANG FengPeng; WANG Kui

doi:10.16579/j.issn.1001.9669.2020.06.028

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LIFE ANALYSIS OF LOW SPEED DIESEL ENGINE BEDPLATE BASED ON CRACK GROWTH

更新时间：2022-09-22

- LIFE ANALYSIS OF LOW SPEED DIESEL ENGINE BEDPLATE BASED ON CRACK GROWTH
- Journal of Mechanical Strength Vol. 42, Issue 6, Pages: 1466-1472(2020)
- 作者机构：
  
  1. 上海交通大学动力机械与工程教育部重点实验室
  2. 上海交通大学高新船舶与深海开发装备协同创新中心
  3. 上海交通大学工程力学系
  4. 中船动力研究院有限公司
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2020.06.028
  CLC：
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ZHANG ZhiYong, CUI Yi, WANG Yi, et al. LIFE ANALYSIS OF LOW SPEED DIESEL ENGINE BEDPLATE BASED ON CRACK GROWTH. [J]. 42(6):1466-1472(2020)
DOI：

ZHANG ZhiYong, CUI Yi, WANG Yi, et al. LIFE ANALYSIS OF LOW SPEED DIESEL ENGINE BEDPLATE BASED ON CRACK GROWTH. [J]. 42(6):1466-1472(2020) DOI： 10.16579/j.issn.1001.9669.2020.06.028.

摘要

以某低速二冲程船用柴油机机座为研究对象,对机座上主轴承座材料ZG200-400开展裂纹扩展试验,得到该材料的疲劳裂纹扩展速率和稳定扩展段的Paris公式。采用子模型方法,建立主轴承座三维裂纹扩展寿命分析模型,结合机座在发动机额定运行工况下一个工作循环(360°曲轴转角)的交变应力分析结果,为主轴承座裂纹扩展模型提供真实边界,计算含有初始缺陷的主轴承座裂纹扩展寿命,结果表明含有初始缺陷的主轴承座裂纹扩展寿命低于低速机大修检查间隔期,论文的研究成果为机座的损伤容限设计在工程应用上提供了一定的参考意义。

Abstract

Taking a low-speed two-stroke marine diesel engine bedplate as the research object.The main bearing seat（material ZG200-400） crack growth rate was tested,and the fatigue crack growth rate and the Paris formula of the stable expansion section were obtained.The three-dimensional crack propagation life analysis model of the main bearing seat was established by the sub-model method.The real boundary conditions of the main bearing seat was obtained by combining with the analysis results of the alternating stress of the bedplate under the actual operating conditions of the engine（360 degree crank angles）.The crack growth life of the main bearing seat with initial crack was calculated.The analysis results show that the crack growth life is less than that of the low-speed two-stroke marine diesel engine overhaul inspection interval.The research results of the thesis provide an reference for the damage tolerance in design engineering application.

关键词

低速柴油机裂纹扩展有限元寿命

Keywords

Low speed diesel engineCrack growthFinite elementLife

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