| 摘要: |
| 针对全熔透GTAW熔池表面变形数值模型存在的熔池上、下表面变形耦合作用不确定、重力势能项不完善的问题,做出了相应的改进。以完备的全熔透熔池上、下表面变形方程为基础,基于精度更高的熔池形状数值分析结果,计算和讨论了GTAW焊接不锈钢和低碳钢的焊接过程达到准稳态时熔池上表面和下表面的变形,并对计算结果给予了试验验证。解决了已有文献中熔透熔池表面变形计算值偏小的问题,提高了熔池表面变形的数值分析精度。 |
| 关键词: 表面变形 全熔透熔池 精度改进 数值模拟 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(50475131) |
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| Improvement on numerical analysis precision of surface deformation of molten pool in fully-penetrated GTAW |
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ZHAO Ming, ZHAI Lei, SUN Yongxing
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College of Mechanical & Electronic Engineering, China University of Petroleum, Qingdao 266555, China
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| Abstract: |
| The improvement was made to solve the problems existing in present numerical models of fully-penetrated GTAW (gas tungsten arc welding)weld pool surface deformation.Based on the complete and correct equations of both top and back surfaces deformations of molten pool and the more accurately predicted weld pool geometry, the fully-penetrated molten pool surface deformation at the quasi-steady state were numerically calculated and discussed.The calculated results were verified by experiments.The results indicate that this study solves the problems of the lesser predicted molten pool surface deformation in literatures, and improves the numerical analysis precision of molten pool surface deformation. |
| Key words: surface deformation fully-penetrated molten pool precision improvement numerical simulation |
