4.6 Article

Dynamic and static structure analysis of the Obermeyer gate under overflow conditions

Journal

COMPUTERS AND CONCRETE
Volume 29, Issue 4, Pages 209-217

Publisher

TECHNO-PRESS
DOI: 10.12989/cac.2022.29.4.209

Keywords

fluid-solid coupling; Obermeyer gate; stable operation; static and dynamic analysis

Funding

  1. scientific research foundation of the National Natural Science Foundation of China-Outstanding Youth Foundation [51622906]
  2. National Natural Science Foundation of China [51479173]

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The force characteristics and vibration characteristics of the Obermeyer gate's shield plate structure under overflow conditions were analyzed using fluid-solid coupling theory. The results showed that flow rate, airbag pressure, and overflow water level all affect the structural performance of the shield plate.
In order to analyze the static and dynamic structural characteristics of the Obermeyer gate under overflow conditions, the force characteristics and vibration characteristics of the shield plate structure are studied based on the fluid-solid coupling theory. In this paper, the effects of the flow rate, airbag pressure and overflow water level on the structural performance of shield plate of air shield dam are explored through the method of controlling variables. The results show that the maximum equivalent stress and total deformation of the shield plate decrease first and then increase with the flow velocity. In addition, they are positively correlated with the airbag pressure. What's more, we find that the maximum equivalent stress of the shield plate decreases first and then increases with the overflow water level, and the total deformation of the shield plate decreases with the overflow water level. What's more importantly, the natural frequency of the shield structure of the Obermeyer gate is concentrated at 50 Hz and 100 Hz, so there is still the possibility of resonance. Once the resonance occurs, the free edge of the shield vibrates back and forth. This work may provide a theoretical reference for the safe and stable operation of the shield of the Obermeyer gate.

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