Design Of A Small Strong Impact Tester And Its Impact Characteristics

With the rapid development of modern weapons and the increasing lethality of ships and shipborne equipment,the anti-impact performance of ships and shipborne equipment is seriously challenged.Therefore,in order to improve the stability and anti-impact of the equipment and compensate the defects of the corresponding detection equipment,a small high-impact test aircraft system is designed.Firstly,the study of the overall scheme of the small-scale strong impact testing machine system was carried out.Three modules including the impact testing system,the electric control system and the pneumatic control system were designed,the workflow of the system was planned and the performance index of the small-scale strong impact testing machine was determined.Secondly,the aerodynamic control module of the small high-impact tester is designed,the operating parameters of each part are approved,the ejection process of the small highimpact tester is modeled and simulated by aerodynamic simulation software,the pressure range of the gas source is controlled between 0.4 MPa and 0.8 MPa,the maximum speed of the tester can be achieved within the cylinder’s travel time is obtained by changing the pressure value in the input cylinder and the elevation of the tester,and the start time of the tester are controlled to avoid the feasibility of the second time of the tester.Next,the dynamic model of the impulse tester system,including mathematical modeling of the shock acceleration waveform and the establishment of the vibration isolation system model,the design of the key component pulse generator and the establishment of the elastic and viscoelastic mathematical models based on the impulse generator materials,the equivalent replacement of the structure of the small high-impact tester,the solution of the impulse generator associated with the dynamic model,the test bed at a speed of up to 13 m / s with the impulse generator,the acceleration peak of 360 g,the design of the electronic control system and the hardware design of the hardware on demand.Finally,the overall structure of the small strong impact test machine was designed,and the finite element software was used to simulate the impact process between the test bench and the base to check the impact strength of the test bench.The impact response of the test bench and the pulse generator is summarised,with a maximum acceleration of 3406 g and a pulse width of 1ms when the maximum test speed is 12.5m/s.By changing the cylinder pressure and the impact stroke,the impact speed of the test bench can be effectively controlled and the secondary collision can be prevented,which fully demonstrates the good control of the small strong impact test machine.