摘要
基于双重生死单元技术并考虑材料热物理性能的温度依赖性特征对正交异性桥面板多道焊缝的动态温度场演变进行数值模拟,以探讨其焊接温度场的分布规律。研究表明:正交异性桥面板的焊接热循环曲线按"快升、快降、缓冷却"的模式演变,焊接顺序显著影响温度场的动态变化,焊缝附近局部高温区主要分布在焊缝两侧10 mm区间内,且各焊缝不同时刻的温度峰值个数并不一致。通过试验验证了数值模拟的可靠性,数值解与实测温度吻合良好。
Considering the characteristic of the temperature dependence of the thermos-physical properties of materials,the numerical simulation of the dynamic temperature field of multi-seam welding of the orthotropic bridge deck panel was carried out on the basis of double life and death element technology,in order to discuss the distribution rule of the welding temperature field.The results show that the welding thermal-cycle curve of orthotropic bridge deck evolves according to the mode of ＂fast rise,fast drop and slow cooling＂.The welding sequence significantly affects the dynamic change of the temperature field.The local high temperature zone near the weld seam is mainly distributed in the range of 10 mm on both sides of the weld seam,and the number of temperature peaks of different weld seams at different time is not the same.The reliability of the numerical simulation is verified by experiments,and the numerical solution is in good agreement with the measured temperature.
作者
张丽
ZHANG Li(Baotou Transportation Planning and Design Institute, Baotou 014040, Inner Mongolia, P. R. Chin)
出处
《重庆交通大学学报（自然科学版）》
CAS
北大核心
2018年第3期5-8,共4页
Journal of Chongqing Jiaotong University(Natural Science)
关键词
桥梁工程
焊接
温度场
数值模拟
正交异性桥面板
bridge engineering
welding
temperature field
numerical simulation
orthotropic bridge deck
