大型拦污栅结构液固耦合流激振动分析

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (21) : 137-141.

论文

大型拦污栅结构液固耦合流激振动分析

申永康1.2 方寒梅3 赵春龙1 刘铨鸿1 王正中1

作者信息 +

Hydrodynamics Induced Vibration Analysis of Fluid-Structure Interaction for Great Trash-Racks

SHEN-Yongkang1.2, FANG-Hanmei3, ZHAO-Chunlong1,LIU-Quanhong1,WANG-Zhengzhong1

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文章历史 +

摘要

以巴基斯坦真纳电站进水口拦污栅结构为对象，研究大型拦污栅结构流激振动及其影响因素。建立了拦污栅结构数值分析模型，以液固单元接触分析处理了液固耦合作用，分析了栅条作用、液固耦合、支撑约束及结构边界条件等因素对大型拦污栅结构动力特性的影响，给出了大型拦污栅避免栅体涡栅共振及栅条流激共振评判条件。结果表明：栅条作用与液固耦合对大型拦污栅结构动力特性的影响不容忽视，结构加固可能降低其动力安全性，而支撑约束及结构边界条件对拦污栅结构振动影响很小。该成果为该型拦污栅流激共振评判提供新依据，为相关技术标准修订提供参考。

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.

导出引用

申永康. 方寒梅赵春龙刘铨鸿王正中. 大型拦污栅结构液固耦合流激振动分析[J]. 振动与冲击, 2014, 33(21): 137-141

SHEN-Yongkang.;FANG-Hanmei;ZHAO-Chunlong;LIU-Quanhong;WANG-Zhengzhong. Hydrodynamics Induced Vibration Analysis of Fluid-Structure Interaction for Great Trash-Racks [J]. Journal of Vibration and Shock, 2014, 33(21): 137-141