Through analysis of water cleaning trajectory in a railway tanker, a mathematical model of cleaning process is set up. Then the actual cleaning trajectories are obtained, and cleaning rate of high pressure water cleaning to the railway tanker is analyzed. Simulations and experiments show that much water is saved and it also has a great significance to improve the cleaning efficiencies of cleaning device.
Concrete crushing of the municipal engineering by traditional broken tools has flaws of inefficient, high dust pollution, high noise, high labor intensity. Hydraulic crushing equipment with ultra-high pressure water jet is designed, which includes the ultra-high pressure five-plunger pump unit and its control system. Engineering applications show the equipment owns characteristics of high efficient, cold state, security, and cannot produce stratified thermal aggregation, heat-affected zone in concrete and dust pollution. Then qualities of concrete hydraulic crusher in a complex environment are improved effectively. It provides an effective method to solve the problems of concrete hydraulic crushing.
The high-pressure water jet cleaning technology is used in the construction of ship cleaning project. The results show that the high-pressure water jet cleaning technology can effectively eliminate pipeline fouling blockage. After cleaning, there is no residual marine organism or other fouling on the surface of pipeline, and there are no surface defects such as thinning of pipeline wall, scratches and pits caused by cleaning. The high-pressure water cleaning technology is an effective way to clean seawater pipeline.
The dynamic mechanical properties of waste glass powder concrete are studied, and the dynamic compressive strength, peak strain, stress-strain curve and dynamic enhancement factor change with strain rate and waste glass powder content are analyzed. Based on the HJC model of concrete, the SHPB test was simulated by ANSYS/LS-DYNA software. With the increase of impact pressure, the phenomenon from block spalling to aggregate crushing appears. When the impact velocity is low, several radial through cracks appear in the test block, and the test block is separated into several blocks with larger volume. With the increase of impact velocity, multiple cracks develop simultaneously.
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