摘要
利用大型有限元软件ANSYS/LS-DYNA对平板金属爆炸焊接过程进行了数值模拟,获得了爆炸焊接过程中形成的射流及波形,模拟结果与试验结果表现出良好的一致性.数值模拟结果证明,数值模型较准确的反映了爆炸焊接射流和波形的形成过程.同时,输出特征点压力和速度—时间曲线可显示出起爆近点压力小于起爆远点压力.在相同药层厚度条件下,起爆近点爆炸复合能量不足,易出现雷管区边界效应,影响焊接质量.此外,通过数值计算碰撞点压力与速度分布,并与理论计算结果进行了比较,说明数值计算值与理论计算值误差不超过5%,可有效指导爆炸焊接参数的选择.
Explosive welding process of metal plate were numerically simulated.By large-scale finite element analytic software ANSYS/LS-DYNA,jet and waveform were obtained.It was found that the experiment results were consistent with the simulated results.Numerically simulated results proved that the numerical model reflected the jet and wave formation process in the explosive welding accurately.Furthermore,characteristic points curves of pressure-time indicated that the pressure of near initiation point was less than that of far point.Under the conditions of the same thickness of drug layer,the point of near initiation was lack of composite energy,it was prone to improving boundary effect and affecting welding quality.In addition,numerically calculated pressure and velocity distribution of collision point compared with the theoretically calculated results,which showed that error of the results between numerical calculation and theoretical calculation was no more than 5%.It could provid an effective guide for selection of experiment parameters.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2010年第9期101-104,108,共5页
Transactions of The China Welding Institution
基金
内蒙古自治区教育厅产学研资助项目(NJcxy08054)
关键词
爆炸焊接
数值模拟
压力
速度
波形
explosive welding
numerical simulation
pressure
velocity
waveform
