Application of a Thin-Walled Structure Theory in Dynamic Stability of Steel Radial Gates

摘要

With the increasing shortage of water resources in the whole earth, many diversion projects have been constructed to make a better use of water resources in many water-shorting places and the radial gates are need to operate partly for adjustment of discharge in these projects. However, the low head steel gate accident emerges increasingly one after another, due to the instability of radial gate arms under dynamic loading action. In this article, the space frame composed of main cross beams, vehicle beams, arms and some other components is taken as one analytical model, based on the perturbation method and thin-walled structure theory, the dynamic instability region can be calculated by the finite element method. Finally, the method is validated by a comparison with existing project data.