118 J.H. Campbell et al. Fig. 12.3 Layout of accelerometers from initial modal tests Fig. 12.4 Schematic of accelerometer layout for modal tests 1’ 1’ 1’ 1’ 1’ 1’ 1’ 6” 6” 1’ 6” 1’ 1’ 6” 12.4 Full-Scale Pyroshock Testing The specific test configurations for each test series were chosen to determine the effect that certain distances had on both the input and the output. Understanding how the wave propagates through the MAPP and how the intensity died off with time was important in post-processing. In all of the configurations there was a control accelerometer that remained constant throughout the test series. The final configuration was a combined response that incorporated all of the detonator locations with common sensor locations. 12.4.1 Test Layout Five different test layouts were utilized in this test series. Four layouts utilized 1 – RP83 detonator, 7270A-60 k accelerometers, 7270A-20 k accelerometers, and 7270A-6 k accelerometers. The location of the accelerometers with respect to the detonator was used to determine what variant to use. Three of the 6 k accelerometers were placed in the AFRL tri-axial mount and attached at the center of the bookshelf. Configuration 1, 2, and 3 show the layouts when 1 detonator is used. Configuration 4 shows the details of the multi-detonator setup (Fig. 12.8). 12.5 Analysis After concluding with the field tests, the sensor data was used to create shock profiles in the time and frequency domains. Acceleration data was compared in the time domain to observed relationships between the single and multiple input configurations. FRF analysis and Cross Power Spectra analysis was the majority of interest in the frequency domain.
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