焊接工程领域建模和数值模拟的不确定性问题

焊接工程领域建模和数值模拟的不确定性问题 Uncertainty in modeling and numerical simulation of welding engineering 杨建国 YANG Jianguo 1 2 3 first-author 王赛 WANG Sai 1 2 郑文健 ZHENG Wenjian 1 2 3 陈泽 CHEN Ze 1 2 浙江工业大学化工机械设计研究所 浙江工业大学化工机械设计研究所 Institute of Chemical Machinery Design, Zhejiang University of Technology Institute of Chemical Machinery Design, Zhejiang University of Technology 浙江工业大学过程装备及其再制造教育部工程研究中心 浙江工业大学过程装备及其再制造教育部工程研究中心 Engineering Research Center for Process Equipment and Remanufacturing, Ministry of Education, Zhejiang University of Technology Engineering Research Center for Process Equipment and Remanufacturing, Ministry of Education, Zhejiang University of Technology 嵊州市浙江工业大学创新研究院 嵊州市浙江工业大学创新研究院 Innovation Research Institute, Zhejiang University of Technology Innovation Research Institute, Zhejiang University of Technology 随着计算机技术进步及有限元等算法的发展,焊接工程中的建模及数值模拟技术已经有了广泛的应用,解决了诸如焊接温度场、应力场、变形、组织演变、寿命预测及结构完整性等诸多方面的问题,但建模及模拟的不确定性一直贯穿于该技术的始终,主要包括参数的不确定性、模型的准确性、资料的不确定性、网格的不相容性、步长的非独立性以及收敛与精度之间的矛盾等问题。有必要开展建模及模拟的验证与确认相关研究,并结合标准化、人工智能、数字孪生等新技术,进一步推进建模及模拟的可靠性。 With the progress of computer technology and the development of finite element algorithm, the modeling and numerical simulation in welding engineering has been widely used, and many problems such as welding temperature field, stress field, deformation, microstructure, life prediction and structural integrity have been solved. However, the uncertainty of modeling and simulation has been throughout the whole technology It mainly includes the uncertainty of parameters, the accuracy of model, the uncertainty of data, the incompatibility of grid, the independence of step size and the contradiction between convergence and accuracy. It is necessary to carry out research on the verification and validation of modeling and simulation, and further promote the reliability of modeling and simulation by combining with new technologies such as standardization, artificial intelligence and digital twins. 焊接 建模 模拟 不确定性 可靠性 welding modeling simulation uncertainty reliability TG40 国家自然科学基金资助项目(51975530) 2022-03-08 9 50