Abstract
For simulating the shock wave with high peak force in a short duration, a novel variable damping hydraulic shock wave simulator was developed, and it was used for simulating the cannon recoil motion. The working principle of this simulator was explained with the assistance of established mathematical model and the flow behavior in damping channel was analyzed. The shock wave characteristics curves were obtained by using the numerical computation method. The results showed that the shock wave characteristics were directly related to the sectional area of the damping channel and the damping fluid medium characteristic; the shock wave curve can be simulated by adjusting the variable damping parameters. The computational results agreed well with the theory analysis, which meant that the proposed mathematical model can be used for supplying theoretical references for the cannon recoil motion in artillery fire shock simulation test.
Highlights
Since the 1950s, equivalent reliable artillery simulation test method had been initially developed, for example, a shock simulation tester equipped with a hydraulic shock cylinder was explored by US researchers [1, 2]
The results showed that the shock wave characteristics were directly related to the sectional area of the damping channel and the damping fluid medium characteristic; the shock wave curve can be simulated by adjusting the variable damping parameters
Hydraulic actuators were reported in simulating the explosion shock in previous literatures, and the system used hydraulic actuators to fire a piston mounted with various impact materials at high velocity; the results showed that this shock simulator had proven to be effective for simulating explosive shock force [8,9,10]
Summary
Since the 1950s, equivalent reliable artillery simulation test method had been initially developed, for example, a shock simulation tester equipped with a hydraulic shock cylinder was explored by US researchers [1, 2]. The shock simulator in University of California, San Diego, was an appropriate tool for developing full-scale test of shock effects on the structures or the mechanical components, and this shock simulator used high velocity hydraulic actuators to impact the designed modules towards the specimen [13]. Considering a simple annular orifice, a new model for nonlinear viscous fluid dampers used in the shock or damper fields was proposed by Hou C Y and its fluid dynamics behavior and shear-thinning effects were analyzed [29,30,31]. The serious shock wave curves were simulated by adjusting the fluid damping parameters and the shock velocity as well as the tested mass
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