Abstract
According to the technical requirements of harsh shock environment test, this paper presents the study on the pneumatic vertical test technology with large load and high-g value. The inspiration of this paper comes from the fact that a compressed air cannon can produce instantaneous and powerful air jets that can be used to drive the tested object to achieve a high initial collision velocity. Then, the principle of shock test technology based on an air cannon and an impact cylinder was put forward, and the idea gas mechanics model was established to theoretically analyze the laws that how the parameters of the air cannon and cylinder influence the initial impact velocities. The test system was built, and the test research was carried out. When the air cannon pressure is 0.5 MPa and 0.65 MPa, respectively, under no-load, the impact acceleration measured is 1990 g (pulse width, 1.26 ms) (1g = 9.8 m/s2) and 4429 g (pulse width, 1.20 ms). It preliminarily validated the effectiveness and feasibility.
Highlights
Air cannon is a kind of declogging device which can produce high pressure air jet by instantly releasing the compressed air deposited in a vessel
E measurement and control system can complete the operation of the shock machine and the acquisition, analysis, and display of the shock acceleration signal
In the field of high-g shock experiments, the technology with large load capacity has always been concerned. is paper presents a technology which is especially suitable for this demand
Summary
Air cannon is a kind of declogging device which can produce high pressure air jet by instantly releasing the compressed air deposited in a vessel. It is known that the energy released by an air cannon is great and concerned with its volume and pressure of the compressed air. It is known that high-g value shocks usually appear in these events such as the separation of rocket booster, explosive impact on military tank structures, or metal-to-metal impact. Such parts or systems working in the harsh inertial environments must strictly test for design qualification, survivability testing, and calibration. E inspiration of this paper comes from the fact that a compressed air cannon can produce instantaneous and powerful air jets that can be used to drive the tested object to achieve a high initial collision velocity. E test results preliminarily validated the effectiveness and feasibility of the technical solution
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