Pyrotechnic Output of TiH/sub X//KClO sub 4 Actuators. IV. Modelling of TiH/sub X//KClO sub 4 Actuator Pyrotechnic Output

摘要

Pyrotechnic output generated by TiH/sub x//KClO sub 4 loaded actuators has been modelled through an analysis of the applicable forces and utilization of relevant VISAR and load cell data. The assumption of a linearly decreasing force--time relationship yields calculated piston velocity and displacement values that are in good agreement with those obtained from VISAR measurements. The resultant gas pressure versus volume values are compared with those obtained experimentally and differences due to the limitations of the model are considered in terms of the physical phenomena. Modelling of load cell output test results have been performed by combining the force--time relationship of the piston alone with that measured in the load cell test. Good agreement with other measured parameters is obtained by limiting the decrease of force on the piston and utilizing an effective piston-crush cone separation distance somewhat greater than the experimental value. These values are shown to be consistent with the physical phenomena. In addition, it is shown that the use of an effective projectile mass, which allows a contribution from a propelled portion of the crush cone, is sufficient to yield satisfactory agreement between measured and calculated results. (ERA citation 04:039519)