Shock waveform control method based on subset simulation optimization

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Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (6) : 82-89.

SHOCK AND EXPLOSION

Shock waveform control method based on subset simulation optimization

LI Fan，LI Hongshuang*

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Abstract

The ground impact test is an indispensable stage before aerospace equipments are put in service so that shock wave generator is one of the most important tool for the reappearance of impact loading. In order to solve the issues of low repetition accuracy and poor controllability of shock wave, a method for optimal parameter design of porous-type shock waveform generator is proposed. According to the flow characteristics of the damping hole and the stress state of the piston, the shock response calculation model of the test system is established, as well as its discrete calculation formulation. Taking into account that the subset simulation optimization algorithm has the advantage of fast convergence and avoiding getting trapped in a local optimal solution when facing high-dimensional complex optimization problems, the algorithm is used to seek the optimal discrete combinations of the number of damping holes in each row and compared with the genetic algorithm.The results show that, with different requirements, the optimized acceleration waveform curves meet the tolerance specified in the corresponding standard, which are better than those obtained from genetic algorithm.

Key words

Impact waveform generator / Damping hole / Acceleration waveform / Subset simulation optimization / Genetic algorithm

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LI Fan, LI Hongshuang. Shock waveform control method based on subset simulation optimization[J]. Journal of Vibration and Shock, 2025, 44(6): 82-89

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