Structure Optimization Design Of Radial Gate Based On The Software ANSYS

Radial gates, due to their characters of the light structure, excellent running and easy operation, are widely used on discharging buildings. During it's operation, for the effect between the flow and the gate each other, the flow-induced vibration appeared ubiquitously. When the vibration amplitude of gate reaches a certain degree, the gate will be destroyed and a great loss will occur subsequently. Nearly, with the development of high dam buildings, the radial gate structures became more and more complex, and the dynamic characteristics became more and more complicated. For preventing form the destroying of resonance, the dynamic characteristics analysis and optimization of radial gates have been become an important research projects.In this thesis, the optimization method of adjusting the gate legs' inertia moment was given. Through this method, the flexural rigidity and the lower steps vibration frequencies of the gate structure can be improved and the gates will escape from the resonance with flow, finally, the structure optimization has been realized.With the calculating tool of the powerful FEM software ANSYS, and combined with the project example, the structure's modal analysis, harmonic response analysis and transient dynamical analysis of the radial gate were calculated and contrasted, which shows that the optimization method was feasible. Additionally the new optimizing method of adjusting the skin plate thickness and legs' inertia moment was explored.The mass optimization of the radial gate was studied with the optimization design module of the software ANSYS, and the problem which should be pay attention to during the designing used this module was be pointed out in this thesis.