Research on Material Characteristics of Granular Mixtures Weir Based on Digital Simulation Technology
Five groups of granular mixtures weirs composed of different block sizes of 20～40,40～60,40～80,60～100,80～120 cm were selected for the experiment of impulse damage resistance.At the same time,Flow-3D simulation technology was used to simulate the physical experiment.On the basis of mutual comparison and verifi-cation,three groups of numerical simulation were expanded.The results show that the flow rate and weir failure situation obtained by the numerical simulation agree with the physical experiment results.Three-dimensional nu-merical simulation technology can be used in the simulation study on structural characteristics of the granular mix-tures weir,making up for the physical model affected by experimental conditions.The flow velocity along the granular mixture weir and the influence range of water fall downstream are positively correlated with the single wide flow through the weir body.The equivalent particle size D and the equivalent weight G of the weir are expo-nentially correlated with the maximum impact velocity v that can be borne by the weir body.Moreover,when the impact velocity exceeds 2.5 m/s,the marginal decreasing effect of the increase of particle size on the anti-impact property is more and more obvious.
granular mixtures weirparticle size of blockimpact velocityphysical model experimentnumerical simulation
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