| 箱型梁焊接变形和应力三维数值模拟 |
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| 引用本文： | 房元斌,李稳,张立平,陆永能. 箱型梁焊接变形和应力三维数值模拟[J]. 电焊机, 2017, 47(6). DOI: 10.7512/j.issn.1001-2303.2017.06.15 |
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| 作者姓名： | 房元斌 李稳 张立平 陆永能 |
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| 作者单位： | 徐工集团江苏徐州工程机械研究院,江苏徐州221004;徐工集团工程机械有限公司高端工程机械智能制造国家重点实验室,江苏徐州221004 |
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| 摘 要： | 利用有限元分析手段模拟箱型梁结构吊臂的焊接过程,得到吊臂的焊后变形和残余应力分布,采用Metra SCAN激光扫描和盲孔法进行试验验证。结果表明:整体变形趋势为向内收缩,焊缝位置附近上翘变形,峰值位置位于起收弧位置,最大变形量1.66 mm;焊缝位置附近残余应力大,应力峰值为459.9 MPa。模拟结果与试验结果误差控制在0.5 mm以内,仿真结果与盲孔法测量结果吻合较好,误差为26.1%,满足工程应用要求,证明了模拟结果的准确性。
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| 关 键 词： | 箱型梁 焊接变形 应力 激光扫描 |
Three-dimensional numerical simulation of the welding deformation and stress of box girder |
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| FANG Yuanbin,LI Wen,ZHANG Liping,LU Yongneng. Three-dimensional numerical simulation of the welding deformation and stress of box girder[J]. Electric Welding Machine, 2017, 47(6). DOI: 10.7512/j.issn.1001-2303.2017.06.15 |
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| Authors: | FANG Yuanbin LI Wen ZHANG Liping LU Yongneng |
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| Abstract: | The welding process of box girder boom is simulated by the finite element analysis and then the postweld deformation and residual stress distribution of the boom are obtained.The experiment is verified by the Metra SCAN and blind-hole methods.The results show that the deformation trend is contracted inwards,the deformation is upwarping near the welds and its peak is located at the arc ignition and extinguishing,the peak value is 1.66 mm.Residual stress is high near the welds and its peak value is 459.9 MPa.The error between simulation results and experimental results is within 0.5 mm.The simulation results well agree with the measurement results of blind-hole method,and the error is 26.1％ and meets the requirements of engineering application,which proves the accuracy of simulation results. |
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| Keywords: | box girder welding deformation stress Metra SCAN |
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