环境压力和间隙对T2/Q235爆炸焊接影响的数值模拟  

Numerical Simulation of the Influence of Environmental Pressure and Stand-Off Distance on T 2/Q 235 Explosive Welding

作　　者：缪广红 朱志强 刘波 董继蕾 陈龙[2] 魏正梅 吴伟达 MIAO Guanghong;ZHU Zhiqiang;LIU Bo;DONG Jilei;CHEN Long;WEI Zhengmei;WU Weida(School of Mechanics and Optoelectronics Physics,Anhui University of Science and Technology,Huainan 232001,Anhui,China;School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan 232001,Anhui,China;Anhui Hongxing Mechanical and Electrical Technology Co.Ltd.,Hefei 231135,Anhui,China)

机构地区：[1]安徽理工大学力学与光电物理学院,安徽淮南232001 [2]安徽理工大学土木建筑学院,安徽淮南232001 [3]安徽红星机电科技股份有限公司,安徽合肥231135

出　　处：《力学季刊》2025年第1期202-210,共9页Chinese Quarterly of Mechanics

基　　金：国家自然科学基金(11902003)。

摘　　要：为研究环境压力和间隙对T2/Q235爆炸焊接复合质量的影响,本文采用Ansys软件对T2/Q235爆炸焊接过程进行三维数值模拟.采用光滑粒子流体动力学(Smooth Particle Hydrodynamics-Finite Element Method,SPH-FEM)耦合算法与任意拉格朗日-欧拉(Arbitrary Lagrangian-Eulerian,ALE)算法,分析不同环境压力和间隙条件下的碰撞速度与碰撞角.结果表明,在相同间隙下,随着环境压力的降低,SPH-FEM算法的碰撞速度在1 atm时达到最大,而ALE算法在0.2 atm时达到最大,更接近试验结果.在相同环境压力下,两种算法均表明6 mm间隙下的碰撞角略大于3 mm和9 mm,而ALE算法在常压下3 mm间隙的碰撞角更接近下限,与试验一致性更佳.此外,将ALE算法下0.2 atm、6 mm间隙的模拟结果与理论计算对比发现,其碰撞速度与碰撞角更接近理论值.研究结果表明,ALE算法模拟结果与试验和理论计算均吻合得更好,验证了其在T2/Q235爆炸焊接模拟中的有效性.To investigate the effects of ambient pressure and standoff distance on the bonding quality of T2/Q235 explosive welding,a three-dimensional numerical simulation of the welding process was conducted using Ansys software.Two computational approaches-the Smooth Particle Hydrodynamics-Finite Element Method(SPH-FEM)coupled algorithm and the Arbitrary Lagrangian-Eulerian(ALE)method-were employed to analyze collision velocity and collision angle under varying ambient pressures(1 atm to 0.2 atm)and stand-off distances(3 mm,6 mm,and 9 mm).Simulation results were systematically compared with experimental data and theoretical calculations.Key findings revealed that:(1)Under decreasing ambient pressure,maximum collision velocity occurred at 1 atm for the SPH-FEM method but shifted to 0.2 atm for the ALE method,aligning more closely with experimental observations;(2)Both algorithms consistently showed larger collision angles at the 6 mm stand-off distance compared to 3 mm and 9 mm configurations,with the ALE method yielding smaller angles closer to experimental lower bounds at 3 mm stand-off under atmospheric pressure;(3)At 0.2 atm ambient pressure and 6 mm stand-off,ALE simulations demonstrated superior agreement with theoretical predictions for both collision velocity and angle.The results conclusively demonstrate that the ALE algorithm achieves higher consistency with experimental measurements and theoretical models compared to the SPH-FEM approach,validating its effectiveness for simulating T 2/Q 235 explosive welding dynamics.

关 键 词：爆炸焊接 数值模拟 环境压力 ALE算法 SPH-FEM耦合算法 

分 类 号：TG456.6[金属学及工艺—焊接]