Wheat Loads and Vertical Pressure Distribution in a Full-scale bin Part II – Detention

1996 ◽  
Vol 39 (3) ◽  
pp. 1145-1149 ◽  
Author(s):  
C. V. Schwab ◽  
I. J. Ross ◽  
G. M. White ◽  
D. G. Colliver
Keyword(s):  
Pressure Distribution ◽  
Full Scale ◽  
Vertical Pressure

Wheat Loads and Vertical Pressure Distribution in a Full-scale Bin Part I — Filling

1994 ◽  
Vol 37 (5) ◽  
pp. 1613-1619 ◽  
Author(s):  
C. V. Schwab ◽  
I. J. Ross ◽  
G. M. White ◽  
D. G. Colliver
Keyword(s):  
Pressure Distribution ◽  
Full Scale ◽  
Vertical Pressure

Full-scale tests of unsteady aerodynamic loads and pressure distribution on fast trains in crosswinds

Measurement ◽  
2021 ◽  
Vol 186 ◽  
pp. 110152
Author(s):  
Hongrui Gao ◽  
Tanghong Liu ◽  
Houyu Gu ◽  
Zhiwei Jiang ◽  
Xiaoshuai Huo ◽  
...  
Keyword(s):  
Pressure Distribution ◽  
Full Scale ◽  
Aerodynamic Loads ◽  
Unsteady Aerodynamic ◽  
Full Scale Tests

Field Performance and Analysis of 3-m-Diameter Induced Trench Culvert under a 19.4-m Soil Cover

2008 ◽  
Vol 2045 (1) ◽  
pp. 68-76 ◽  
Author(s):  
Bethanie A. Parker ◽  
Rodney P. McAffee ◽  
Arun J. Valsangkar
Keyword(s):  
Pressure Distribution ◽  
Earth Pressure ◽  
Field Performance ◽  
Overburden Pressure ◽  
Vertical Pressure ◽  
Earth Pressures ◽  
Design Loads ◽  
Horizontal Pressure ◽  
Two Stages

An induced trench installation was instrumented to monitor earth pressures and settlements during construction. Some of the unique features of this case study are as follows: (a) both contact and earth pressure cells were used; (b) part of the culvert is under a new embankment and part was installed in a wide trench within an existing embankment; (c) a large stockpile was temporarily placed over the induced trench; and (d) the compressible material was placed in two stages. The maximum vertical pressure measured in the field at the crown of the culvert was 0.24 times the overburden pressure. The maximum horizontal pressure measured on the side of the culvert at the springline was 0.45 times the overburden pressure. The column of soil directly above the compressible zone settled approximately 40% more than did the adjacent fill. The field results at the crown and springline compared reasonably with those observed with numerical modeling. However, the overall pressure distribution on the pipe was expected to be nonuniform, the average vertical pressure calculated by using numerical analysis on top of the culvert over its full width was 0.61 times the overburden pressure, and the average horizontal pressure calculated on the side of the culvert over its full height was 0.44 times the overburden pressure. When the full pressure distribution on the pipe is considered, the recommended design loads from the Marston–Spangler theory slightly underpredict the maximum loads, and the vertical loads control the design.

Some Factors Influencing Friction Brake Performance: Part 1—Investigation of Full-scale Brake Systems

1989 ◽  
Vol 111 (1) ◽  
pp. 2-7
Author(s):  
Z. Barecki ◽  
S. F. Scieszka
Keyword(s):  
Pressure Distribution ◽  
Elastic Deformation ◽  
Full Scale ◽  
Factors Influencing ◽  
Braking Torque ◽  
Brake Performance ◽  
Friction Brake ◽  
Friction Lining

In this paper the effect on braking torque of the geometry of contact between brake shoes and drums is presented. It is shown that elastic deformation as well as errors in dimensional and assembly errors substantially affect the value of the braking torque. Investigations of pressure distribution on friction lining, brake factor, brake element deformation, and wear of linings carried out on mine winder installations are presented.

scholarly journals PROPAGATION OF EXPLOSIVE SOUND IN A LIQUID LAYER OVERLYING A SEMI‐INFINITE ELASTIC SOLID

Geophysics ◽  
1950 ◽  
Vol 15 (3) ◽  
pp. 426-446 ◽  
Author(s):  
Frank Press ◽  
Maurice Ewing
Keyword(s):  
Phase Velocity ◽  
Pressure Distribution ◽  
Group Velocity ◽  
Normal Mode ◽  
Liquid Layer ◽  
Elastic Solid ◽  
Mode Propagation ◽  
Vertical Pressure ◽  
Velocity Amplitude ◽  
Incoming Signal

The Pekeris theory of normal mode propagation of explosion sound in two liquid layers is extended to include the case of a solid bottom. Curves giving phase velocity, group velocity, amplitude, vertical pressure distribution as a function of frequency are presented. The relative merits of geophones and hydrophones for underwater seismology and the best depth for each type of instrument are discussed in the light of the theory. The characteristics of an incoming signal are described.

scholarly journals How obstacle geometry and snow properties influence avalanche impact pressure

2020 ◽  
Author(s):  
Michael L. Kyburz ◽  
Betty Sovilla ◽  
Johan Gaume ◽  
Christophe Ancey
Keyword(s):  
Experimental Data ◽  
Drag Coefficient ◽  
Pressure Distribution ◽  
Amplification Factor ◽  
Test Site ◽  
Full Scale ◽  
Impact Pressure ◽  
Snow Properties ◽  
Avalanche Flow ◽  
Obstacle Geometry

<p>In order to estimate avalanche loads on buildings and structures of various sizes and geometries,  practitioners are interested in recommendations or experimental data for a wide variety of obstacle geometries and sizes. Full-scale avalanche measurements are performed across the world since the late 1970s to increase knowledge about avalanche flow behaviour, including impact on structures. These structures are usually equipped with sensors to measure impact pressure, avalanche velocity and/or snow density. Modifying the structure profile is hardly possible because of high construction costs. To date, it has thus been possible to test and calibrate empirical relationships used in engineering only on a limited number of structures for which experimental data exist. We therefore aim to calibrate the drag coefficient and amplification factor for a broader range of obstacle shapes and sizes. In this context the drag coefficient generalizes the drag coefficient used in Newtonian fluid mechanics when computing the flow past an obstacle. The amplification factor reflects the snow load’s deviation from a hydrostatic-like pressure. To estimate these two parameters, we simulate how an avalanche interacts with differently sized and shaped obstacles using the Discrete Element Method (DEM). First, we test the DEM model’s capacity to reproduce full-scale pressure measurements performed on two different obstacles at the Vallée de la Sionne test site by comparing simulated and measured impact pressures. Second, we run new simulations involving other geometries and dimensions, for which no experimental data exist. Our results show that the pressure distribution depends not only on the obstacle geometry, but also on avalanche flow regime and snow properties. We eventually examine the pressure distribution for different generic geometries and avalanche scenarios. This analysis should ultimately help to improve extant engineering guidelines.</p>

AERODYNAMIC FORCE DEDUCTION ON YACHT SAILS USING PRESSURE AND SHAPE MEASUREMENTS IN REAL TIME

2015 ◽  
Vol 157 (B2) ◽  
Author(s):  
D Le Pelley ◽  
D Morris ◽  
P Richards ◽  
D Motta
Keyword(s):  
Wind Tunnel ◽  
Pressure Distribution ◽  
Real Time ◽  
Aerodynamic Force ◽  
Full Scale ◽  
Force Distribution ◽  
Wind Tunnel Tests ◽  
Force Components ◽  
Full Scale Testing

This paper describes a method of deducing aerodynamic force components produced by individual sails. This is achieved by measuring the pressure distribution at a number of discrete locations over the sail and extrapolating these measurements into a distribution across the entire sail surface. The sail shape is measured using the camera-based VSPARS system and the force distribution over the sail surface is then determined. Wind tunnel tests have been conducted to validate the accuracy of the model. Full scale testing has been undertaken to investigate how aerodynamic effects of trimming sails affect yacht performance.

An Experimental Determination of Pressure Forces on a Ship Model From an Analysis of the Wave Profile

1965 ◽  
Vol 9 (03) ◽  
pp. 113-117
Author(s):  
Grant Lewison
Keyword(s):  
Pressure Distribution ◽  
Experimental Determination ◽  
Wave Resistance ◽  
Wave Profile ◽  
Full Scale ◽  
Axisymmetric Model ◽  
Ship Model ◽  
New Form

A method for the analysis of the wave profile alongside a ship model is presented in a new form. The pressure distribution over an axisymmetric model is computed, and wave resistance and vertical forces are derived from it. The application of the method to other model forms and also to full-scale ships is discussed.

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