Study On Flow-Induced Vibration Of Guide Wall And Optimization Of Its Shape

The vibration of the hydraulic structure caused by discharged flood energy dissipation ,fluid-structure interaction and high-speed flow are concerned problem of hydraulic engineering constructions in our country in recent years. In this paper, based on the actual need of engineering project,in order to solve the problem of project,the motion law of discharged flood was studied ,especially the hydrodynamic loads and the interaction with the hydraulic structure ,finally the theoretical calculation and the modal experiment were done. In this paper,the case of Xiangjiaba Project on Jinsha River was taken as background information,the guide walls in stilling basin were taken as study object,the flow-induced structure dynamical response of guide walls were studied。The main conclusions can be gained as follows:(1) Based on the hydraulic model experiment of guide walls in stilling basin,the peak value and the spectrum of loads on the guide walls are studied and compared； (2) The compound modal were analyzed,and the structure frequency and theshape of vibration were gained； (3) Taking the testing the uplift on slab as load,we calculated the flow-inducedstructure dynamical response in the mathematical model；(4) Based on the hydrodynamic-elasticity model with the mode scale,the dynamic displacement and the stress of the test were gained. The theoretical results and the testing results were compared；(5) Some theories and methods about Genetic Algorithms have been introduced simply, the shapes of guide walls have been optimized by the genetic algorithm;The research achievements in the thesis can be applied to the actual engineering, and the research method also can provide certain reference value to other kinds of flow-induced vibration problems.