Research Of The Experiment Technique On The High G Impact

This paper conducts research on the ultra-high g impact testing in two aspects: First ,the calibration of the acceleration testing system with the high g impact testing modeling testing equipment; Second, the analysis of anti-high impact property and nonlinear buffer protection for the atmosphere cannonball and acceleration memory and testing system, to improve the survival of the circuit module in extreme environment and increase the recycling rate and data-taking rate.This paper adopts the method of a combination of theoretical analysis, computer modeling and lab experimentation to process the research on the basis of indexing relative documentation home and abroad widely:(1) Relative methods of acceleration signal treatment are proposed according to different testing requirement by the theoretical analysis of the stress wave propagation influence on the field testing acceleration signal and the influence on the acceleration of testing point of the cannonball to solve the problem of data treatment for high g value acceleration field testing signal.(2) Conservation of momentum and kinetic energy assignment of the atmosphere cannonball and memory testing equipment is carried out with the primary collision theory.(3)Foundation is provided by utilizing the primary strength theory to analyze the atmosphere cannonball and the strength requirement of structure design of the testing equipment in the collision bumping and applying the ANSYS-LS-DYNA modeling bumping of cannonball and testing equipment to study the stress, acceleration and speed at the test point. The excellent buffer property of the foam aluminum is tested and verified taking the advantage of the sound buffer effect of foam aluminum ANSYS-LS-DYNA modeling used at the high g acceleration impact testing modeling equipment, based on the research of non-linear buffer theoretical study on the buffer protection of foam aluminum to the circuit module.(4) Dynamic calibration of the acceleration testing system is actualized by imposing high g impact signal on testing system with the atmosphere cannon, direct testing the bumping speed of the whole process with laser interferometer, calculating the acceleration through the data treatment of Doppler signal and comparing it with the acceleration signal of the memory testing system.