桥门式起重机疲劳裂纹扩展寿命的模拟估算  

Estimation of fatigue crack extension life for Overhead and gantry cranes

作　　者：程文明[1] 王金诺[1] 

机构地区：[1]西南交通大学机械工程研究所

出　　处：《起重运输机械》2001年第2期1-4,共4页Hoisting and Conveying Machinery

摘　　要：根据前人的试验和研究成果 ,总结推荐了桥门式起重机焊接箱形梁的各项疲劳参数取值 ,同时以等幅载荷疲劳裂纹稳定扩展阶段的计算公式为基础 ,针对起重机承受随机载荷的特点 ,根据时间循环法 ,用计算机模拟估算出桥门式起重机焊接箱形梁的疲劳裂纹扩展寿命。On the basis of previous test data and research achievement,the values of the various fatigue parameters of welded box girders on overhead and gantry cranes are recommended in this paper.At the same time,considering the property of the random loads exerted on the cranes,the fatigue crack extention life of the welded box girder is estimated through computer simulation,using time-cycle algorithm based on calculating foumula for constant amplitude loading fatigue crack during stable extending period.

关 键 词：桥门式起重机 焊接结构 疲劳裂纹扩展寿命 箱形梁 模拟估算 

分 类 号：TH213.5[机械工程—机械制造及自动化] O346[理学—固体力学]