Research On The Vibration Isolation Mechanism Of Cushioning Materials In High-impact Environments

In the process of penetrating the target,the projectile and the internal fuse would be subjected to extremely high impact.The internal circuit board and mechanical mechanism of the fuze were prone to failure under the impact,which caused the fuze to fail to work normally,affected the operation of the penetrating projectile.The use of cushioning materials to isolate the fuse from the warhead is a common method of buffer protection.For the two different types of materials,PTFE and aluminum foam,the vertical air gun was used for the impact test,and the numerical simulation was used to analyze the buffering ability of the two materials in the penetrating environment.The specific work is as follows:Firstly,for the laboratory's existing vertical air gun device,the test device was used to simulate the elastic connection structure,and the performance of the cushioning material during the impact process was tested by the high g value acceleration sensor.The acquired signals were analyzed to study the buffering performance of PTFE and aluminum foam in a high-impact environment,and both were found to have buffering capacity.Secondly,the test device was modeled using computer software and parameters were set according to the test conditions to obtain an overload signal of the internal sensor of the test device with different buffer materials added.The qualitative analysis and correlation analysis method were used to compare the simulation results with the actual test results.The buffering ability of the two materials was verified and the accuracy of the simulation results was ensured,which can be used as a reference for actual situation analysis.Thirdly,the mechanism of material buffer vibration isolation was analyzed,and the waveforms of overload signals after adding two different buffer materials were compared and analyzed.The difference of buffering capacity of buffer materials with different vibration isolation mechanisms under high impact environment was confirmed.The comparison found that the foam aluminum buffer material is stronger in the same environment.Fourthly,in order to study the performance of the two materials during the penetration process,a certain type of penetrating projectile was selected for modeling and simulation,and numerical simulation technology was used to study the buffering ability of different materials.According to the results,it was found that both materials can reduce the impact peak,but the subsequent waveform optimization is poor.