| 热-机械载荷下U形对焊接头的安定性 |
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| 引用本文： | 郑小涛,彭常飞,喻九阳,王成刚.热-机械载荷下U形对焊接头的安定性[J].焊接学报,2013(10):39-42. |
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| 作者姓名： | 郑小涛 彭常飞 喻九阳 王成刚 |
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| 作者单位： | 武汉工程大学机电工程学院, 武汉 430205,武汉工程大学机电工程学院, 武汉 430205,武汉工程大学机电工程学院, 武汉 430205,武汉工程大学机电工程学院, 武汉 430205 |
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| 基金项目： | 国家自然科学基金资助项目(50976080);武汉工程大学科学研究基金资助项目(14125061) |
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| 摘 要： | 结合非线性叠加法和通用有限元软件ABAQUS研究了内压和温度载荷下U形对焊接头的安定性,探讨了焊缝几何尺寸及焊接材料对压力管道安定性的影响.结果表明,当焊接材料的弹性模量、线膨胀系数和屈服应力与母材相差很大时,在焊接处产生较大的局部应力,可显著影响结构的安定性,而焊接坡口尺寸对安定域影响很小;建立了一种适于工程安定性评估的简化图解法.
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| 关 键 词： | 安定性 焊接接头 压力管道 热-机械载荷 |
| 收稿时间： | 2012/7/16 0:00:00 |
Shakedown analysis of U-groove butt welded joints under cyclic thermo-mechanical loadings |
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| ZHENG Xiaotao,PENG Changfei,YU Jiuyang and WANG Chenggang.Shakedown analysis of U-groove butt welded joints under cyclic thermo-mechanical loadings[J].Transactions of The China Welding Institution,2013(10):39-42. |
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| Authors: | ZHENG Xiaotao PENG Changfei YU Jiuyang and WANG Chenggang |
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| Affiliation: | Wuhan Institute of Technology, School of Mechanical Engineering, Wuhan 430205, China,Wuhan Institute of Technology, School of Mechanical Engineering, Wuhan 430205, China,Wuhan Institute of Technology, School of Mechanical Engineering, Wuhan 430205, China and Wuhan Institute of Technology, School of Mechanical Engineering, Wuhan 430205, China |
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| Abstract: | As the requirement of high accuracy in seam tracking,the systems dynamics become more prominent in seam tracking process.The non-complete dynamic model for the four wheeled mobile welding robot was established.Variable structure controller with sliding mode has been designed to complete coordinately controlling of cross-slider and mobile welding robot.Several factors have been considered including the influence of the inertia,electrical machinery dynamics,surface irregularity and other factors in seam tracking process on the tracking accuracy.Through the theoretical analysis and simulation,it has been proved that the dynamic model and the variable structure controller with sliding mode are correct and valid in seam tracking.It has set up important foundation for off-line programming,simulation and dynamic control of mobile welding robot. |
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| Keywords: | shakedown welded joints pressure piping thermo-mechanical loadings |
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