Weld distortion prediction of the ITER Vacuum Vessel using Finite Element simulations
Weld distortion prediction of the ITER Vacuum Vessel using Finite Element simulations
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DOI：
10.1016/j.fusengdes.2013.02.101
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发表时间：
2013-10
影响因子：
1.7
通讯作者：
J. Caixas;J. Guirao;A. Bayon;L. Jones;Jean-Francois Arbogast;Andrea Barbensi;A. Dans;Aldo Facca;E. Fernández;José M. Fernandez;S. Iglesias;M. Jiménez;P. Jucker;G. Micó Montava;J. Ordieres;J. Pacheco;R. Paoletti;G. Sanguinetti;V. Stamos;M. Tacconelli
中科院分区：
文献类型：
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作者：
J. Caixas;J. Guirao;A. Bayon;L. Jones;Jean-Francois Arbogast;Andrea Barbensi;A. Dans;Aldo Facca;E. Fernández;José M. Fernandez;S. Iglesias;M. Jiménez;P. Jucker;G. Micó Montava;J. Ordieres;J. Pacheco;R. Paoletti;G. Sanguinetti;V. Stamos;M. Tacconelli
ITER真空容器扇区的焊接表面需要在非常严格的公差范围内，没有全尺寸原型。为了预测焊接变形并优化制造顺序，工业合同包括对焊接过程进行广泛的计算模拟，可以快速评估不同的顺序。在每个制造阶段之后，精确的形状预测使实际变形能够与焊接模拟进行比较，以生成修改的程序和预补偿变形。虽然以前的模型使用重型焊接夹具，试图限制扭曲，这种方法允许使用轻型夹具，并产生重要的成本和返工节省。为了使不同的替代焊接序列的优化，模拟方法进行了改进，使用凝聚计算技术与ANSYS，以减少计算资源。对于每个焊接过程，模型与试样和实物模型的结果进行校准。校准用于构建每个段和扇区的代表性模型。本文介绍了应用增强的模拟方法与压缩有限元计算技术的真空容器部门的建设和结果的校准几个测试件不同类型的焊缝。
The as-welded surfaces of the ITER Vacuum Vessel sectors need to be within a very tight tolerance, without a full-scale prototype. In order to predict welding distortion and optimize the manufacturing sequence, the industrial contract includes extensive computational simulations of the weld processes which can rapidly assess different sequences. The accurate shape prediction, after each manufacturing phase, enables actual distortions to be compared with the welding simulations to generate modified procedures and pre-compensate distortions. While previous mock-ups used heavy welded-on jigs to try to restrain the distortions, this method allows the use of lightweight jigs and yields important cost and rework savings. In order to enable the optimization of different alternative welding sequences, the simulation methodology is improved using condensed computation techniques with ANSYS in order to reduce computational resources. For each welding process, the models are calibrated with the results of coupons and mock-ups. The calibration is used to construct representative models of each segment and sector. This paper describes the application to the construction of the Vacuum Vessel sector of the enhanced simulation methodology with condensed Finite Element computation techniques and results of the calibration on several test pieces for different types of welds.