Abstract:The pyroshock simulation test on the ground is achieved through a hanging test. Two separation parts are connected by explosive bolts. The pretightening force of explosive bolts may have influence on impulse response during a pyroshock event.Considering the pretightening force is determined by the tightening torque and the weight of the lower separation part,the importance of these two factors is investigated in this research by applying a FE numerical simulation and a hanging test. Different tightening torque and separation part weight are considered. The experiment results are analyzed both in time and frequency domain. Both the simulation and experiment results indicate that the influence of thoses two factors is limited at mid-field and far-field from the explosive bolts.
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