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《Noise and Vibration Control》 2012-04
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Dynamic Characteristics Research of U-shape Thin-wall Aqueduct under the Action of Fluid

WANG Qing-yun1,SUN Yuan-yuan1,ZHOU Sheng-tong2,BAI Xin-li1(1.School of Civil Engineering and Communication,North China University of Water Resources and Electric Power,Zhengzhou 450011,China;2.State Key Laboratory of Mechanical System and Vibration,Shanghai Jiaotong University,Shanghai 200240,China)  
Two types of U-shape thin-wall aqueduct models with considering the action of fluid were established according to the potential-based fluid theory and Westergaard theory respectively.With these two models,modal analysis of the aqueduct was conducted,and the effects of water depth on the modal results were also analyzed.Comparing modal results of between these two models,it was found that:(1) the natural frequencies of aqueduct decrease with the increase of water depth;(2) the modal results of Westergaard model are lower than these of potential-based fluid model;moreover,(3) the effects of water depth on the natural frequencies corresponding to the same mode shapes are also different in these two models.On the basis of the comprehensive results comparisons and analysis,an improved Westergaard model(iWestergaard model) was proposed,results showed that the results of i Westergaard model are agree well with these of potential-based fluid model.
【Fund】: 国家科技支撑计划项目(基金编号:2007BAG02A04)
【CateGory Index】: TV672.3
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【Citations】
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【Co-citations】
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