Research On Overload Characteristics Of Initiating Device By Falling Ball Collision Simulation Tests

The tests and evaluation of the anti-overload ability aimed at the initiating device, especially for high-speed kinetic bombs, penetration bombs,have attracted the attention of many military developed countries. Falling ball test, as a technology to assess the anti-overload ability of explosive, is the most concise and economical new testing method utilized in launching process. In this paper, an exploring research was presented to investigate the new method, and a test acceleration generator was designed and installed. Through the measurement and control system, impact loading acceleration eigenvalues were acquired under varied heights, ball diameters and plate thickness, respectively. After the analysis and comparison of all the experimental data, an ideal target plate and Falling ball size suitable for the experiment were presented, which laid the foundation for the establishment and perfection of the follow-up testing database.Based on the Falling ball test, Wave-shaping technology was used to improve the test environment so that the duration of peak acceleration was extended. It has been manifested that the wave shape can be significantly improved with the application of Wave-shaping technology.Finite element analysis methods and large-scale finite element analysis software ANSYS /LS-DYNA were adopted to analyze and simulate the impact loading of the Falling ball test. It was observed that the results of simulation and the results of experiment fitted well so that the simulation could be used to check the feasibility and accuracy of the tests, and the founda-tion was set up for the future application of the software for mass simulation.