National advisory committee aeronautics Report no. 328. Water pressure distribution on a twin-float seaplane,

1930 ◽  
Vol 209 (1) ◽  
pp. 147
Keyword(s):  
Pressure Distribution ◽  
Advisory Committee ◽  
Water Pressure

scholarly journals Laboratory study on response of underwater cohesive sediment to columnar vibration source

2018 ◽  
Vol 54 (3) ◽  
pp. 193-202
Author(s):  
Peng Zhao ◽  
Feier Chen ◽  
Guoliang Yu
Keyword(s):  
Pressure Distribution ◽  
Experimental Observation ◽  
Pore Water ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Near Field ◽  
Mechanical Vibration ◽  
Cohesive Sediment ◽  
Vibration Source ◽  
Soil Pressure

Abstract This paper investigates the responses of cohesive sediment to mechanical vibration by experimental observation, containing: (1) the dynamic soil pressure, dynamic pore water pressure and dynamic acceleration to the vibration source; (2) the soil pressure distribution in the near field centered in an artificial columnar vibration source. Under the mechanical vibration with a frequency of 200 Hz and an amplitude of 1.15 mm, the dynamic soil pressure, dynamic pore water pressure and dynamic acceleration of underwater viscous sediment were measured in the sediment of four different depositing conditions. Results of the dynamic soil pressure, dynamic pore water pressure and dynamic acceleration of underwater viscous sediment in the near field responding to artificial vibration source are exhibited and discussed. It is found that, excited by the sinusoidal vibrator, the soil pressure presents a response of statistical sinusoidal fluctuation with the same frequency to the vibration source. In the sediment of lower initial yield stresses, the soil pressure distribution distinctly tends to firstly increase and then decrease with distance. The amplitude of the soil pressure is attenuated exponentially with distance.

Fluid-Solid Coupling Analysis of External Water Pressure Distribution Patterns on Drainage Segment Lining

2011 ◽  
Vol 255-260 ◽  
pp. 3656-3660 ◽  
Author(s):  
Qi Xiang Yan ◽  
Xi Cheng ◽  
Jun Zheng
Keyword(s):  
Pressure Distribution ◽  
Fractured Rock ◽  
Water Pressure ◽  
Distribution Patterns ◽  
Structure Type ◽  
Analysis Model ◽  
Coupling Analysis ◽  
Drainage Hole ◽  
Reduction Effect ◽  
External Water

Drainage segment lining is a new structure type formed by setting up drainage holes on the conventional segment lining. Based on continuum fluid-solid coupling analysis model of fractured rock mass, the distribution patterns of water pressure behind the lining walls and in surrounding rock are studied under three kinds of water pressure, while the segment lining with double drainage holes at each side of one ring has been applied. The results show that the water pressure behind segment lining wall could be effectively reduced by setting up drainage holes, and the pressure distribution patterns are in horseshoe shape approximately. The reduction effect of water pressure is more and more obvious from the tunnel crown to the elevation where the drainage holes are provided. But the drainage hole leads to uneven distribution of water pressure, causing the increase of local moment. So, more attention should be paid to the drainage segment lining during design.

Pore Water Pressure Distribution and Dissipation During Thaw Consolidation

2016 ◽  
Vol 116 (2) ◽  
pp. 435-451 ◽  
Author(s):  
Xiaoliang Yao ◽  
Jilin Qi ◽  
Mengxin Liu ◽  
Fan Yu
Keyword(s):  
Pressure Distribution ◽  
Pore Water ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Thaw Consolidation

scholarly journals Analysis of the Elastic Large Deflection Behavior for Metal Plates under Nonuniformly Distributed Lateral Pressure with In-Plane Loads

2012 ◽  
Vol 2012 ◽  
pp. 1-17 ◽  
Author(s):  
Jeom Kee Paik ◽  
Ju Hye Park ◽  
Bong Ju Kim
Keyword(s):  
Pressure Distribution ◽  
Large Deflection ◽  
Lateral Pressure ◽  
Water Pressure ◽  
Offshore Structures ◽  
Design Methods ◽  
Uniform Pressure ◽  
Bending Moments ◽  
Maritime Industry ◽  
Metal Plates

The Galerkin method is applied to analyze the elastic large deflection behavior of metal plates subject to a combination of in-plane loads such as biaxial loads, edge shear and biaxial inplane bending moments, and uniformly or nonuniformly distributed lateral pressure loads. The motive of the present study was initiated by the fact that metal plates of ships and ship-shaped offshore structures at sea are often subjected to non-uniformly distributed lateral pressure loads arising from cargo or water pressure, together with inplane axial loads or inplane bending moments, but the current practice of the maritime industry usually applies some simplified design methods assuming that the non-uniform pressure distribution in the plates can be replaced by an equivalence of uniform pressure distribution. Applied examples are presented, demonstrating that the current plate design methods of the maritime industry may be inappropriate when the non-uniformity of lateral pressure loads becomes more significant.

scholarly journals The Risk of Liquefaction Associated with Water Head Fluctuation in the Low-lying Area of Tokyo

2019 ◽  
Vol 8 (2) ◽  
pp. 41-47
Author(s):  
Tomohide Takeyama ◽  
Kazuya Honda ◽  
Atsushi Iizuka
Keyword(s):  
Pressure Distribution ◽  
Pore Water ◽  
Seismic Analysis ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Ground Level ◽  
Flood Damage ◽  
Tokyo Bay ◽  
Ground Settlement ◽  
Groundwater Head

 In the wide area of the eastern part of Tokyo, the ground level is less than mean sea level. This area is more vulnerable to disasters than other areas. If large flood damage such as storm surge should occur in this area, the disaster would be a long-term catastrophe. On the coast of Tokyo Bay, countermeasures have been taken by tide embankments and floodgates. However, considering the damage scale when it occurs, an analysis in this area is very important. In this area, ground settlement occurred and groundwater head dropped because groundwater excessively withdrew by the industrial purpose during the period of economic growth. Currently, the groundwater head recovers and the ground settlement has been subsided. However, due to the groundwater head fluctuation, pore water pressure distribution had been different from hydrostatic pressure distribution. Therefore, in the analysis in this area, it is necessary to consider past groundwater head fluctuation. In this research, the ground settlement and the distribution of pore water pressure are simulated from groundwater level fluctuation over the past 100 years. Then, we conducted the seismic analysis by input the distribution of effective stress calculating from the simulated ground water pressure. The sites analyzed in this research are Tokyo Sea Life Park at the mouth of Arakawa River.

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