1.Institute of Water Resources Hydropower Engineering , Northwest A & F University，Yangling,Shanxi 712100; 2.Yangling Vocation and Technology College, Yangling Shanxi 712100，3.Hydrochina XIBEI Engineering Corporation，Xiaan,Shanxi 710058
Abstract：Flow-induced vibration and these influences factors to great trash-racks were investigated for hydraulic trash-racks of power intake at Pakistan Jinnah Hydropower Project. The numerical analysis model was presented, the fluid-structure interaction effect were investigated by element touch between fluid and structure, these influences factors on dynamic character of great trash-racks were studied according to racks, fluid-structure interaction, brace constraint and boundary condition, the judgment conditions on vortex-resonance occurrence of great trash-racks were improved. The results showed that gird bar and fluid-structure interaction were important to influence the dynamic characters of great trash-rack, structure reinforce were maybe reduced the dynamic safety for great trash-racks, yet brace constraint and boundary condition were small effect on the trash-racks vibration. The study provided a new basis for evaluating the flow-induced sympathetic vibration for this model trash-rack and some references for revising these related technical standards.
2014, Vol. 33 
