Research On Dynamic Response Of Layed High Intake Tower And Vibration Of Stop Log Gate

The intake is an important part of the hydroelectric station, which safety is link to the normal working and the hydroelectric station benefit. The intake tower as a tall thin trunk or a columnar is in the water under normal working. There are some questions must be regarded when seism happens, for example, the interaction between structure and water,the crack form,the interaction between intakes,the pulsating water pressure and the flow-induced vibration of the stop log gate. This paper had done lots of systemic work according to the mentioned questions above. The research is important to the structure optimize design and the normal working for high intake tower of big hydroelectric station, the main parts of which are listed as below.The theory of fluid-structure interaction was applied to the research about the self vibration characteristic, the response of the structure and the interaction between structure and water. The interaction is more distinct by the strong fluid-structure interaction, and the dynamical pressure was showed as figure in the paper.This paper brought forward a judgment of the concrete's breakage according to the characteristic of the finite element, which was applied to the research of the intake tower under earthquake, the rule of breakage for the intake tower was showed in the paper.The effect of traveling wave is important to the long span intake tower group, especially for the interaction between towers. As the results show: the collision between the towers was obvious and the interaction was effected obviously by the seismic waves.A s-transform program based on Matlab was used to the time-frequency transform analysis on pulsating water pressure, explained the distributing characteristic of the swing and the phase of pulsating water pressure; and then make an estimate of resonance between the strobe and the pulsating water pressure according to the self vibration of strobe and the dominant frequency of pulsating water pressure.According to the model test result and the finite element method, a random vibration power spectrum was utilized in this paper to study the flow-induced vibration of the strobe, the response of the strobe under the pulsating water pressure was achieved, finally, an estimate was made for strobe.