作　　者： (孟立春）; (徐济进）; (樊元英）; (孙晓红）;

机构地区： 南车青岛四方机车车辆股份有限公司,青岛266111

出　　处： 《江苏科技大学学报（自然科学版）》 2017年第3期298-302,共5页

摘　　要： 提出基于平均温度曲线法的高速列车复杂结构焊接变形快速数值模拟方法.针对A7N01铝合金平板对接多道焊,分别采用移动热源法和平均温度曲线法模拟焊接过程,将两种计算方法得到的焊接变形和残余应力的模拟值与实测值比较,验证平均温度曲线法替代移动热源法的可行性.结果表明:平均温度曲线法计算的焊接残余应力和变形与移动热源法计算结果基本一致,两种方法的计算结果与实测值比较吻合,因此,可以采用平均温度曲线法替代移动热源法模拟复杂结构的焊接过程.针对高速列车枕梁,基于平均温度曲线法模拟了枕梁焊接过程,枕梁焊接变形的计算值与实测值变形趋势一致,计算的变形值误差在10%以内. In order to simulate the welding process of complex welded structure in high - speed trains, a quick welding simulation method is proposed based on an average temperature curve method. A multi pass welding ex-periment of A7N01 aluminum alloy plate was carried out. The welding process was simulated by a moving heat source method and the average temperature curve method, respectively. Through the comparison of the welding deformations and the residual stresses simulated by the two calculation methods with those measured, we con-clude that the average temperature method was validated to replace the moving heat source method in simulating the welding process. The results show that the simulated welding residual stresses and deformation by average temperature method are in good agreement with the results by the moving heat source method, which are consist-ent with the measured values. Therefore, the average temperature method can replace the moving heat source method in simulating the welding process of complex welded structure. The welding process of sleeper beam was simulated based on the average temperature method. The predicted welding deformations of the sleeper beam show the same change trend with the measured results. The error between the calculated values and the measured values is less than 10% .

关 键 词： 数值模拟 平均温度曲线法 焊接变形 枕梁