装药弹动态应力有限元分析

Finite Element Analysis of Dynamic Stress in Bomb's Explosive Column

为研究装药弹输弹过程安全性,采用ANSYS软件进行了动态应力分析。在有限元数值模拟中,一种是按实弹进行;另一种将弹体进行了合理简化,简化后可减少计算量的1/3,且结果相差不多。应力集中主要出现在弹壳部分,最大值为0.00117 MPa,与药柱屈服极限8.67 MPa相差甚远;所产生的变形的最大值为6.05×10-9m,非常微小,可以恢复。在有限元计算中采用保守的约束条件,实际输弹过程比以上值小,安全性得到保证。

The dynamic stress of bomb＇s explosive column was analyzed using ANSYS software to study the security in transportation. In the finite element numerical simulation, two methods were used： one was simulated in actual condition, the other was simplified by reducing 1/3 computation load. The results are almost same. Calculation shows that the stress mainly concentrates in the shell of the bomb and drug body suffers small. The maximum stress is 0. 00117 MPa, which is greatly less than the yield limit 8.67 MPa of explosive pillar in the same density, the maximum deformation is 6.05×10^-9 m. These values were obtained in conserva- tive constraints. The values of real condition are smaller than these. It is safe in transportation.