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中南大学学报(自然科学版)

Journal of Central South University

第43卷    第2期    总第210期    2012年2月

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文章编号:1672-7207(2012)02-0675-06
矩形渡槽流固耦合体系风致的动力性能
刘亮,张华,郜余伟

(河海大学 土木与交通学院,江苏 南京,210098)

摘 要: 以排架矩形渡槽为研究对象,建立三维渡槽水流固耦合计算模型,通过自回归滑动平均(ARMA)模型模拟脉动风,采用任意拉格朗日-欧拉(ALE)方法求解渡槽和水体的耦合相互作用问题,针对不同水深工况、不同渡槽截面高宽比,计算分析渡槽流固耦合体系在风荷载随机动力作用下的横向位移、倾覆力矩及动水压力。研究结果表明:不同高宽比的渡槽随着槽内水深的变化,其流固耦合体系风致动力性能的变化规律性相近;在等流量水深工况下,截面高宽比的变化对渡槽结构的振动和稳定性有显著影响,在渡槽抗风设计中应予以重视。

 

关键字: 矩形渡槽;ARMA 模型;流固耦合;风振响应

Wind-induced vibration of fluid-structure interaction system for rectangular aqueduct
LIU Liang, ZHANG Hua, GAO Yu-wei

College of Civil Engineering and Traffic Engineering, Hohai University, Nanjing 210098, China

Abstract:Based on rectangular aqueduct structures, the wind response of aqueduct-water coupling systems was studied by using the arbitrary Lagrangian-Eulerian (ALE) method. Three-dimensional model with fluid-structure interaction was established. The fluctuating wind speed time series was simulated with resorting to auto-regressive moving average (ARMA) model. The transversal displacement, the dynamic water pressure and the upsetting moment of aqueduct with different depth-width ratios were calculated in different water depth conditions under stochastic wind loads. The results show that the changing regularity of the wind-induced dynamic responses of aqueduct-water coupling systems with the change of water-depth is similar. The change of depth-width ratio greatly affects the vibration and stability of aqueduct in the same water condition, which should be paid more attention to in the wind-resistant design of aqueduct structure.

 

Key words: rectangular aqueduct; ARMA model; fluid-structure interaction; wind response

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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