双面爆炸焊接的数值模拟

Numerical Simulation of Double-Sided Explosive Welding

双面爆炸焊接一次起爆可同时焊接两组复合板,而且使炸药临界厚度显著降低,提高了炸药的能量利用率,解决了爆炸焊接现存的高噪低效问题。借助ANSYS/LS-DYNA动力学分析软件,运用光滑粒子流体动力学方法(SPH)与有限元(FEM)耦合算法,对双面爆炸焊接进行了三维数值模拟,并将模拟结果与实验结果和理论计算结果进行了对比。结果表明,数值模拟结果与实验结果较吻合,且与Deribas的理论计算结果一致性较好,说明Deribas公式和SPH-FEM耦合方法对双面爆炸焊接具有较好的指导意义。

The high noise and low efficiency of explosive welding can be improved by the double-sided explosive welding which can clad two composite plates simultaneously and significantly reduce the critical thickness of stable detonation of explosives.In this study,we simulated the double-sided explosive welding using the explicit finite element program LS-DYNA combined with the SPH （Smoothed Particle Hydrodynamics） and FEM （Finite Element Method） coupling,and compared the simulation results with the experiment and the calculation results.The results showed that the simulation results were in good agreement with the experiment results as well as the theoretical calculation results of Deribas s.It shows that the Deribas s formula and SPH-FEM coupling method can provide theoretical guidance for the engineering application of double-sided explosive welding.