Designing a shock test system prototype based on a hydroelastic drive

Laboratory shock tests involve the reproduction of simple one-time and repeated pulses a certain waveform. In practice, such mechanical impacts on an object are implemented at specialized testing equipment ‒ systems. A promising direction in development machines includes structures that operate energy elastic deformation compressed liquid shell vessel contains it. Such systems make it possible to improve versatility, manageability, accuracy impact tests. Underlying this study is use hydroelastic drive design prototype automated electro-hydraulic system for test system. The proposed makes expand functionality installations perform with series pulses, as well manageability increase level automation. main feature structural scheme reconfiguration new pulse occurs very quickly. Owing presence driven rotary drum braking devices, bench generate repetition frequency 1‒2 Hz. constructed mathematical model machine takes into consideration inertia moving masses, rigidity or "one-way" spring charging chamber, influence dampers which platform rests. variables linked by differential equations describing two periods within work cycle: generation. model's practical value determine dynamic characteristics installation, calculate required technological parameters. movements have been solved numerical way. results established optimal (in terms minimizing overload article return stroke rod) damping factor device, 13,000 kg/s. setting, ratio amplitude acceleration reverse effective during reduced minimum 0.195