Dynamic Performance Evaluation of Gate Vibration

Chowdhury, Mostafiz R.; Hall, Robert L.

doi:10.1061/(asce)0733-9445(1999)125:4(445)

Cited by 3 publications

(1 citation statement)

References 12 publications

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“…Considering the difficulty of giving the integrand which represents the function of fluctuating pressure as the incentive, Fourier transform is taken on both sides of the integral so that the response can be calculated by employing the frequency response function and the power spectrum density which is gotten by tests. Therefore, structures' response can be analyzed in frequency domain [1][2] .…”

Section: Introductionmentioning

confidence: 99%

Orthogonal Expansion Method of Random Processes for Fluctuating Pressure of Water Flow

Zhou

2013

AMM

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Combining with its auto-correlation function, the stochastic process of water flows fluctuating pressure is decomposed on the trigonometric bases by employing an expansion method based on normalized orthogonal bases which is prescribed, and thus establish an incentive model for the random dynamic response analysis of structures vibrated by water flows fluctuating pressure. By using the model, main probabilistic characters of the flows stochastic process are captured with only a few random variables, and therefore laid the foundation for further random response and reliability analysis from the point of probability density evolution. By using it in an instance, the validity of the model is tested from the aspect of second order statistics such as sampling ensemble power spectrum and sample mean square error. The effects of simulation duration and expansion numbers needed on the simulations efficiency and accuracy are also discussed.

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Section: Introductionmentioning

confidence: 99%

Orthogonal Expansion Method of Random Processes for Fluctuating Pressure of Water Flow

Zhou

2013

AMM

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Design and evaluation of an integrated FRP composite wicket gate

Vijay

Soti

GangaRao

et al. 2016

Composite Structures

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Hydraulic gates need to be lightweight , corrosion-resistant, maintenance-free, and durable with high endurance under fatigue loads. All of these requirements could be challenges to be met using conventional materials like steel and concrete. However, with the emergence of advanced Fiber Reinforced Polymer (FRP) composites for waterway structures, it has now been possible to achieve all of these physical and performance requirements in a cost-effective manner. Due to their lightness, excellent corrosion and wear resistance along with superior thermo-mechanical properties, FRPs have emerged as one of the best alternatives in the field of civil infrastructure. This paper covers several aspects of the design, manufacturing, testing, analysis, and field implementation of a novel integrated FRP wicket gate in Mississippi River lock and dam. The cellular FRP panel with foam core and integrated stiffening and fastening components has been analyzed to compute the bending stiffness both theoretically and experimentally and a good correlation has been obtained.

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Characteristics of Plane Gate Vibration and Holding Force in Closing Process by Experiments

Wang

et al. 2020

Applied Sciences

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A 1:25 scale physical model test was employed to study the plane gate vibration and holding force under the conditions of the fixed gate opening and closing process, respectively. We paid more attention to the characteristics of the gate vibration, holding force and the failure of gate-closing in closing process. The correlation between gate vibration and holding force was further examined. The results show that vertical vibration is weaker than the lateral and horizontal vibrations in fixed gate opening and is stronger than the lateral and vertical vibrations in closing process. Gate vertical vibration is self-excited vibration with a frequency of 7–14 Hz. Besides, crawl vibration in closing process is related to the upstream water depth. The higher the water level is, the earlier the crawl vibration appears. After the crawl stage, plane gate stops motion at a certain distance from the chamber floor and then the failure of gate-closing happens. Finally, gate vibration in three directions is significantly correlated with the holding force. In closing process, holding force has positive correlation with the vertical vibration and has negative correlation with the lateral and horizontal vibrations. In the crawl stage, the average of correlation coefficient in lateral, vertical and horizontal direction is −0.723, 0.733 and −0.664, respectively. Thus, the influence of gate vibration on holding force should be taken into consideration in determining the hoists capacity.

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Dynamic Performance Evaluation of Gate Vibration

Cited by 3 publications

References 12 publications

Orthogonal Expansion Method of Random Processes for Fluctuating Pressure of Water Flow

Orthogonal Expansion Method of Random Processes for Fluctuating Pressure of Water Flow

Design and evaluation of an integrated FRP composite wicket gate

Characteristics of Plane Gate Vibration and Holding Force in Closing Process by Experiments

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