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基于非线性累积损伤理论的起重机桁架臂K节点疲劳寿命研究

蔡福海 王欣 彭黎 赵福令

蔡福海, 王欣, 彭黎, 赵福令. 基于非线性累积损伤理论的起重机桁架臂K节点疲劳寿命研究[J]. 机械科学与技术, 2014, 33(9): 1287-1292. doi: 10.13433/j.cnki.1003-8728.2014.0902
引用本文: 蔡福海, 王欣, 彭黎, 赵福令. 基于非线性累积损伤理论的起重机桁架臂K节点疲劳寿命研究[J]. 机械科学与技术, 2014, 33(9): 1287-1292. doi: 10.13433/j.cnki.1003-8728.2014.0902
Cai Fuhai, Wang Xin, Peng Li, Zhao Fuling. Analysis of the Fatigue Life for K-nodes of Crane Based on the Non-linear Cumulative Damage Theory[J]. Mechanical Science and Technology for Aerospace Engineering, 2014, 33(9): 1287-1292. doi: 10.13433/j.cnki.1003-8728.2014.0902
Citation: Cai Fuhai, Wang Xin, Peng Li, Zhao Fuling. Analysis of the Fatigue Life for K-nodes of Crane Based on the Non-linear Cumulative Damage Theory[J]. Mechanical Science and Technology for Aerospace Engineering, 2014, 33(9): 1287-1292. doi: 10.13433/j.cnki.1003-8728.2014.0902

基于非线性累积损伤理论的起重机桁架臂K节点疲劳寿命研究

doi: 10.13433/j.cnki.1003-8728.2014.0902
基金项目: 

国家科技支撑计划项目(20112011BAF04B01)

国家质检总局科技项目(2013QK168)

江苏省产学研联合创新资金项目(BY2012089)资助

详细信息
    作者简介:

    蔡福海(1982-),博士研究生,研究方向为工程机械疲劳寿命,cfhdlut@163.com;王欣(联系人),教授,博士,wangxbd21@163.com

    蔡福海(1982-),博士研究生,研究方向为工程机械疲劳寿命,cfhdlut@163.com;王欣(联系人),教授,博士,wangxbd21@163.com

Analysis of the Fatigue Life for K-nodes of Crane Based on the Non-linear Cumulative Damage Theory

  • 摘要: 起重机桁架臂焊缝数量多、受力状况复杂,K节点的疲劳寿命采用线性Palmgren-Miner(PM)法则进行计算的精度较差。提出了基于虚拟样机技术的"实测+仿真+比对+统计"组合策略的载荷谱获取方法,可以极大幅度降低实测应力谱的工作量和成本。首次将Huffman非线性累积损伤理论应用于桁架臂K节点疲劳寿命分析,通过设定焊接构件不同的初始损伤,得到了使计算疲劳寿命趋于适度保守的初始损伤建议值。疲劳试验结果表明:此方法比PM法则计算精度更高,由于只需要循环应力-应变曲线和常幅应变寿命曲线等少量的材料性能数据,计算简单,工程应用价值较大。
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  • 收稿日期:  2013-09-18

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