Structure Optimization And Vibration Mitigation Design Of Impact Resistance Test Device

During the shock wave overpressure test,there are often phenomena of shock vibration and fragment impact on the measurement device structure,which can cause significant noise in the test signal and affect the reliability and accuracy of the test data.Hence,to enhance the impact resistance of the shock wave overpressure testing equipment and the precision of sensor signal acquisition,structural optimization of the pertinent device is indispensable.To address these concerns,this paper has carried out the ensuing investigation:First of all,in the course of designing the structure of a shock wave testing device,it is important to consider the possibility of the device dislodging and suffering an impact while measuring overpressure in explosive environments,particularly when fixed to a building wall or other testing point.In order to better protect the circuit storage structure and improve the impact resistance of the device while ensuring that the device quality is within a controllable range.Through the use of structural mechanics simulation software and related structural optimization theories,simulation data and visual post-processing images related to structural optimization can be obtained,and the stress and deformation of the device housing structure with separate memory and sensor installation under different impact conditions can be analyzed,and further feedback optimization of the device structural design can be carried out.This completes the structural design of the shock wave testing device under the multi objective requirements.Secondly,in the experiment of the shock wave overpressure testing device in the free field testing section in the air,there is a problem that shock waves cause mechanical vibration at the mounting positions of multiple structures of the sensor,which can cause noise to the measured signal.Therefore,based on the existing sensor installation devices,a study has been conducted on the design of buffer structures for the connection and fixation positions of sensors and mechanical structures under free field test conditions in the air.Through simulation and force hammer experiments,the buffer effect and reliability have been verified,and the optimal design of sensor buffer structures with different vibration isolation thicknesses has been obtained.Finally,in the ground testing part of the shock wave overpressure testing device,the shock wave overpressure testing device may be subject to signal interference caused by the impact of fragments generated by the explosion on the device shell.Therefore,a sensor suspension buffer structure design was proposed for the ground overpressure measurement device without separating the storage part from the sensor installation.By comparing the stress and strain results of the suspension seat under different conditions such as the impact speed of the fragments and the different shapes of the fragments,the stability and damping amplitude of the suspension seat were simulated and verified,verifying the reliability of the damping design.