Research on fragment scattering simulation method of dynamic explosive warhead
In order to study the accuracy of the results by LS-DYNA simulation methods,the cylinder shell charge structure and the prefabricated fragment shell charge structure were selected for static explosion,and the prefabricated fragment shell charge structure was selected for dynamic explosion,the effects of different algorithms on the results were compared and analyzed.The results show that the charge uses Lagrange algorithm is better than ALE algorithm in dynamic and static explosion.During static explosion,the relative error of the copper shell expansion velocity of the cylinder charge structure are less than 3.02％,and the average relative errors of the fragment initial velocity and direction angle of the prefabricated fragment shell charge structure are 2.62％and 16.12％.During dynamic explosion,the result of air domain motion is better,the average relative errors of fragment initial velocity and direction angle are less than 3％and 15％.Considering the calculation accuracy and calculation time,the Lagrange algorithm is more suitable for dynamic and static fragment dispersion parameter study.
万方数据
维普
