金属加工（热加工）Issue(1)：85-90,6.
动车组车体结构多层多道焊接变形的有限元模拟与验证
Finite element simulation and verification of multi-layer multi-pass welding deformation in EMU carbody structures
摘要
Abstract
To address the challenge of balancing computational efficiency and accuracy in numerical simulation of welding deformation for large-scale engineering structures,this paper proposes a finite element simulation method based on a local-global mapping strategy.The method establishes a refined local weld model for temperature field analysis and applies the obtained thermal cycle curves to the global structural model through a mapping algorithm,thereby establishing a rapid prediction system for welding-induced stress and deformation.Specifically targeting the prevalent multi-layer multi-pass welding process in EMU(Electric Multiple Unit)underframe fabrication,a thermal cycle superposition equivalent algorithm is developed to establish the cumulative relationship between multi-pass heat inputs and an equivalent single-pass heat source,enabling simplified modeling of multi-pass welding processes.Experimental validation demonstrates the effectiveness of the proposed method,revealing that when using the equivalent single-pass loading derived from thermal cycle superposition,the relative error in welding deformation remains below 5％,with a significant reduction in computational time.The study confirms that this method significantly enhances computational efficiency through thermal source mapping and superposition algorithms while maintaining accuracy,providing a novel numerical tool for process optimization in large-scale complex welded structures.关键词
焊接变形/有限元模拟/多层多道焊/高速列车Key words
welding deformation/finite element simulation/multi-layer multi-pass welding/high-speed trains引用本文复制引用
耿明,王亚男,刘松,郭春城,姚官禹,陈静青..动车组车体结构多层多道焊接变形的有限元模拟与验证[J].金属加工（热加工）,2026,(1):85-90,6.基金项目
国家重点研发计划(2023YFB3407800). （2023YFB3407800）
