《机电工程》杂志社科技期刊核心期刊论文投稿机电一体化机械、仪表电工自动化、计算机浙江大学主办

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Estimation of strain fatigue of crane girder

Published:2015-04-08 author:XV Gui-fang1，YU Zhen2，DONG Hao-ming1，WEI Guo-qian2，YUE Xu-dong2 Browse: 2858 Check PDF documents

Estimation of strain fatigue of crane girder

XV Gui-fang1，YU Zhen2，DONG Hao-ming1，WEI Guo-qian2，YUE Xu-dong2

（1. Wuhan Especial Equipment Supervise Test Institute，Wuhan 430019，China；

2. College of Machinery and Automation，Wuhan University of Science and Technology，Wuhan 430081，China）

Abstract：Aiming at solving the generation and propagation mechanism of the crane girder crack，by analyzing the strain single of the

crane girder near the crack，and the strain fatigue phenomenon of the crane girder was tested，the results of strain test signals near a

crane girder crack，strain fatigue phenomenon appeared in the main beam was found，then five point three times smoothing for the strain

signal was carried on，and the load spectrum was analyzed and studied，the stress value was calculated by consulted the material's fatigue

parameters of Q345 from the related references，and the stress-strain characteristic curve was drawn，then the fatigue life of crane girder

was calculated according to the Manson-Coffin formula and Miner linear damage cumulative rules，that is the safe operation time value of

the crane. The results indicate that the crack crane service life estimation method can be popularized application，and provides reasonable

methods for the prediction of fatigue life of crane.

Key words：crane girder；strain；fatigue life；crack

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