基于ANSYS的船舶维修背水焊接残余应力及温度场模拟计算研究

Research on Simulation and Calculation of Residual Stress and Temperature Field during Ship Repair of Water-back Welding

根据船体背水焊接的特点,结合材料手册确定的材料高温热物理参数,通过计算及与文献实验数据对比确定钢板—水强对流换热系数,解决了边界条件和热源加载问题。在建立平板堆焊有限元模型的基础上,采用段状高斯热源进行背水焊前预热和背水堆焊温度场及应力场的数值模拟,为提出达到船级社质量要求的工艺方案提供理论依据。

According to the features, of hull water-back welding, combined with the thermo-physical parameter of material determined in material manual, it is to define the steel plate - water severe convective heat transfer coefficient by calculation and comparison of document and experimental data and to solve the problem of boundary condition and heating loading source. It is conducted the numeric.al simulation of preheating, temperature and stress fields of water-back welding by adopting sectional gauss heating source upon the establishment of finite element model about surfacing plate welding to provide theoretical basis＇ for putting forward the process program which meets the clualitv reauirements of classification societies.