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对非对称外壳形成倾斜尾翼EFP进行了数值模拟。通过利用LS-DYNA软件和流固耦合方法,对所设计的采用非对称变壁厚外壳的药型罩的成型过程进行数值计算,并与对称外壳进行了比较,分析了直尾翼和倾斜尾翼形成过程的异同。数值模拟结果表明,非对称外壳可以形成倾斜尾翼EFP,倾斜尾翼可以为弹丸提供导转力矩,使EFP在飞行中旋转,从而改善飞行稳定性并提高着靶精度。
The numerical simulation of empennage tail fin EFP was carried out. By using the LS-DYNA software and the fluid-solid coupling method, the forming process of the medicine cover with the asymmetrical variable wall thickness shell is numerically calculated and compared with the symmetrical shell, and the formation of the straight tail and the tail fin Process similarities and differences. The numerical simulation results show that the asymmetric shell can form inclined tail EFP. The inclined tail can provide the guide torque for the projectile so that the EFP can rotate in flight, so as to improve the flight stability and improve the target accuracy.