内燃机工程2017，Vol.38Issue(1)：102-108,7.DOI:10.13949/j.cnki.nrjgc.2017.01.017
某星形活塞发动机主连杆多轴疲劳强度分析
Multiple-Axle Fatigue Analysis of a Star Engine Master Conrod
景国玺 1张小良 1王斌 2许春光 1王小慧 1赵志强1
作者信息
- 1. 中国北方发动机研究所,天津 300400
- 2. 中航工业南方航空工业有限公司产品设计所,株洲 412002
- 折叠
摘要
Abstract
To assess the master conrod structural strength of a star engine, a kinematic and dynamic analysis models of the crank-conrod mechanism was established and the load characteristics was obtained.The finite element model considering structure nonlinear factors was calibrated by the measured stress data from the simulant, and then used to calculate dynamic stress field over the entire operating cycle.The analysis results show that the additional bending moment from slave conrod is the main factor which causes the stress of the dangerous part of master conrod shank to be too high.And then considering the impact of structural factors such as surface technology, the multiple-axle fatigue of master conrod was assessed based on the critical plane approach.The results show that the fatigue safety factor of the transition region between the conrod shank and the big end is relatively low, which has been confirmed by the actual fatigue crack.关键词
内燃机/主连杆/多轴疲劳/有限元法/应力Key words
IC engine/master conrod/multiple-axle fatigue/finite element method/stress分类
能源科技引用本文复制引用
景国玺,张小良,王斌,许春光,王小慧,赵志强..某星形活塞发动机主连杆多轴疲劳强度分析[J].内燃机工程,2017,38(1):102-108,7.
