Research On The Key Technology Of Multi-layer Penetration Shock Signal Simulation

In the modern warfare,some strategically important facilities such as command hubs,arsenals and hangars usually are protected by defense facilities constructed with complex structure.In order to achieve the attacker’s strategic purposes,the most effective mean to destroy such well-defended facilities is the hard-target penetrating projectile.In order to ensure that the high value penetrator can play its due role in the battlefield,it is necessary to test and verify whether the fuze can detective and distinguish the multiple penetrating signals or not.The commonly shooting test is costly,while the simulation test can effectively reduce the cost,and regulate the amplitude and pulse width of the acceleration signal to simulate different penetrating situation.By analyzing the acceleration signal of fuze during penetration process,a rotary impact test device is designed,which can verify whether the fuze can detective and distinguish the multiple penetrating signals or not.The simulation indicated that the interval between two impact is less than 3ms,and the maximum of acceleration is higher than 5000g,which meets the design requirements.A control method for short impact interval is put forward.The impact test device can be stable at a constant speed of revolution to provide power to the impact progress through regulating the asynchronous motor by vector control method.Anew impactor is put forward which can secede from the impact room by rotating after the impact between this impactor and detector has finished to ensure the detector can return to its impact position.The acceleration of detector effected by impactor made of different materials and different thickness and the different impact angles and velocity was studied by modeling and simulation of the impactor and detector.The conclusions are drawn that the impact pulse width of steel impactor is larger than that of aluminum alloy impactor,the thickness of impactor only affect the maximum of the acceleration;the impact acceleration is the maximum when the impact angle is around 90 degrees;the maximum of the acceleration is linear with impact velocity.Some experiments are done to detective the acceleration changes of detector impacted by impactors with different impact velocity.The test results show that when the impact angle was 60 degrees,the detector’s maximum of the acceleration is linearly proportional to the impact velocity.The detector’s acceleration curve is similar to the acceleration curve of actual measured target penetration fuze in amplitude,impact interval and pulse width.The rotary impact test device can be used to verify the fuze whether can detective and distinguish the multiple penetrating signals or not.