| 少载荷级数下桥式起重机桥架疲劳安全寿命研究 |
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| 引用本文： | 高琳,董红娟,吴树宝.少载荷级数下桥式起重机桥架疲劳安全寿命研究[J].工业安全与环保,2016(11). |
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| 作者姓名： | 高琳 董红娟 吴树宝 |
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| 作者单位： | 1. 内蒙古科技大学机械工程学院内蒙古包头014010;2. 内蒙古科技大学矿业研究院内蒙古包头014010;3. 包钢薄板坯连铸连轧厂内蒙古包头014010 |
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| 基金项目： | 内蒙古自治区自然科学基金(2015BS0511)，内蒙古科技大学创新基金(2011NCL038)。 |
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| 摘 要： | 提出了一种针对少载荷级数作用下的桥式起重机桥架裂纹萌生寿命计算的新数值模拟方法。该方法利用ANSYS软件中的生死单元模拟吊重起升和小车运行,得到桥架在3级载荷作用下的瞬态应力响应,将应力数据集导入到疲劳软件FE-SAFE中,根据多轴局部应力应变算法,基于Morrow平均应力修正下的Brown Miller损伤模型,对32t/A6桥式起重机桥架进行疲劳分析。计算结果表明,桥架疲劳寿命满足使用要求,疲劳失效主要发生在端梁腹板的拐角处。
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| 关 键 词： | 桥式起重机 动态特性 疲劳 FE-SAFE 桥架 |
Numerical Simulation Study on Fatigue Failure of Bridge Crane Frame Under Fewer Load Grades |
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| Abstract: | A novel numerical simulation method for crack initiation life of bridge crane frame subjected to less load levels is proposed in this paper .Based on“birth and death of element” in ANSYS software ,transient dynamic response of bridge frame under three level loads is obtained by simulating load lifting and cart traveling .The result stress datasets are added to a fatigue analyzing software FE -SAFE next and fatigue analysis of 32t/A6 bridge crane frame is conducted based on multiaxial local stress-strain method and Brown Miller damage model under Morrow mean stress correction method .The calculation results show that fatigue life of bridge frame meets the design requirements and fatigue failures mainly take place in the cor-ner of end girder web . |
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| Keywords: | bridge crane dynamic characteristic fatigue FE-SAFE crane frame |
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