Optimal design of an explosive separation device based on LS-DYNA

Too much energy margin could cause excessive damage to shell and influence the work and sealability of aerospace pyrotechnics devices. Taking an explosive separation device as example, LS-DYNA finite element simulation technology is introduced to pre-estimate, and the variation range of charge is given by experimental verification. In the simulation process, 310 mg original charge is taken as a starting point, and charge is adjusted by a certain step size. The simulation results show that the original charge cause excessive damage to shell, while charge decreases to 108 mg, it meets the requirements of separation without causing shell damage. Charge is reduced to 40% by optimization, which is experimentally verified. The results show that 10 products are reliable separation and does not appear crack after placed a period of time, which conform to the use requirements. This research solves practical engineering problems and provides reference for optimal design of similar products.