scholarly journals Instrumental Uncertainty of Conductance Transducers for Maritime Reduced-Scale Models

2021 ◽  
Vol 11 (9) ◽  
pp. 3772
Author(s):  
Luís Filipe Lages Martins ◽  
Álvaro Silva Ribeiro ◽  
Alexandre Pinheiro ◽  
Ricardo Mendes ◽  
Catarina Simões
Keyword(s):  
Measurement Uncertainty ◽  
Dynamic Regime ◽  
Electrical Stability ◽  
Characterization Methods ◽  
Scale Models ◽  
Instrumental Measurement ◽  
Measurement Principle ◽  
Experimental Facilities ◽  
Thermal Influence ◽  
Reduced Scale

This paper aims to determine the instrumental measurement uncertainty of conductance transducers for maritime reduced-scale models developed in hydraulic experimental facilities. These transducers are used for the measurements of wave levels and their variations under a dynamic regime (being the measurement principle and method briefly described in the paper). Several metrological characterization methods are also presented, aiming to identify and quantify measurement uncertainty components, namely electrical stability, linearity, reversibility, repeatability, and thermal influence. The obtained results were applied in the evaluation of the transducer instrumental measurement uncertainty.

Shaking Table Test Analysis of Bottom-Business Multi-Story Masonry Structure in Small and Middle Towns in the Southward

2014 ◽  
Vol 580-583 ◽  
pp. 1463-1466
Author(s):  
Yong Duo Liang ◽  
Xun Guo ◽  
Hua Wei Yi ◽  
Yong Zhen Li ◽  
Jin Zheng Jiang
Keyword(s):  
Shaking Table Test ◽  
Masonry Structure ◽  
Shaking Table ◽  
Earthquake Simulation ◽  
Seismic Capacity ◽  
Test Analysis ◽  
Earthquake Resistant ◽  
Scale Models ◽  
Longitudinal Wall ◽  
Reduced Scale

Bottom-business multi-story masonry structure is widely used in small and middle towns in the southward in China. In the downtown of Beichuan county which affected by Wenchuan earthquake, more than 80% of this kind of building collapsed. But the Apartment of Beichuan Telecommunication Bureau behaved well earthquake resistant capacity with a moderate damage in the earthquake. The obvious difference between this building and others is the setting of winged columns in the front longitudinal wall of the first floor. For proving the influence of these members in the structure seismic capacity, the earthquake simulation shaking table test of 2 1/5 reduced scale models were designed and carried out. The models dynamic response, acceleration, displacement and strain were measured and collected, that model with winged columns behave well was testified. And the reinforcement method of balancing stiffness and increasing ductility is put forward. The results provide a foundation for the retrofitting design of the existing houses.

Investigation of the Mechanical Behavior of 3D Printed Polyamide-12 Joints for Reduced Scale Models of Rock Mass

2020 ◽  
Vol 53 (6) ◽  
pp. 2687-2705
Author(s):  
Jana Jaber ◽  
Marianne Conin ◽  
Olivier Deck ◽  
Mohamed Moumni ◽  
Olivier Godard ◽  
...  
Keyword(s):  
Rock Mass ◽  
Mechanical Behavior ◽  
Polyamide 12 ◽  
Scale Models ◽  
3D Printed ◽  
Reduced Scale

Particle Based Numerical Analysis of Green Water on FPSO Deck

2013 ◽  
Author(s):  
Cezar Augusto Bellezi ◽  
Liang-Yee Cheng ◽  
Kazuo Nishimoto
Keyword(s):  
Experimental Data ◽  
Numerical Analysis ◽  
Sea Water ◽  
Three Dimensional ◽  
High Amplitude ◽  
Green Water ◽  
Scale Models ◽  
Three Dimensional Models ◽  
Reduced Scale ◽  
Good Agreement

The green water phenomenon is boarding of sea water onto the deck due to high amplitude waves, which can cause several damages to the equipment on deck. In the present paper the green water phenomenon on three-dimensional models is analyzed using the Moving Particles Semi-Implicit Method (MPS), a fully lagrangian method for incompressible flow. This work is focused on the validation of the method comparing the numerical results with experimental results for green water on reduced scale models. The pressure on sensors over the deck of the models shows good agreement with experimental data.

Late Minoan III and Early Iron Age Cretan Cylindrical Terracotta Models: A Reconsideration

2006 ◽  
Vol 101 ◽  
pp. 183-216 ◽  
Author(s):  
Vassilis P. Petrakis
Keyword(s):  
Iron Age ◽  
Early Iron Age ◽  
Ancestor Worship ◽  
Archaeological Data ◽  
Scale Models ◽  
Terracotta Figurines ◽  
Relationship Of ◽  
The Relationship ◽  
Theoretical Issues ◽  
Reduced Scale

The present study explores the possible interpretation of the terracotta cylindrical models found in Late Minoan to Early Iron Age contexts (generally known as “(circular) hut models”) as reduced-scale models of tholos tombs. Theoretical issues concerning the relationship of an ‘architectural model’ with the archaeological context in which it is found are examined in order to support the above-mentioned suggestion. Archaeological data concerning the morphology, chronology, distribution, use and significance of the Late Minoan and Early Iron Age tholos tombs are explored in order to contribute to the discussion. The possible connection between the presence of the LM III tomb models in domestic contexts and the absence of contemporary intramural burials allows us to expand on the possible significance of these artefacts for our knowledge of LM mortuary practices and beliefs, especially those concerning the possible practice of ‘ancestor worship’. The presence of terracotta figurines of the ‘Minoan Goddess with Upraised Arms’ type attached in the interior of two examples (from SM Knossos and PG B Archanes) is considered as a late development within the tradition of these models and linked with the practice of placing MGUA figures in Early Iron Age tholos tombs (Rhotasi, Kourtes).

scholarly journals Geotechnical characterization and modelling of the “Fallen Lands” phenomenon in the amazon environment

2021 ◽  
Vol 9 (3) ◽  
pp. 122-132
Author(s):  
Elias Santos Souza ◽  
Nilton de Souza Campelo ◽  
Raimundo Humberto Cavalcante Lima ◽  
René Levy Aguiar
Keyword(s):  
Shear Strength ◽  
Computational Models ◽  
Sandy Soils ◽  
Shear Resistance ◽  
Critical Conditions ◽  
Soil Layers ◽  
Economic Problems ◽  
Geotechnical Characterization ◽  
Scale Models ◽  
Reduced Scale

In many rivers of the Amazon, mainly along the Amazon River, the phenomenon of "fallen land" occurs at the time of the rivers' ebb, causing the erosion of river banks, resulting in major social and economic problems. The influence of saturation/percolation of soil layers on the shear resistance of the affected massifs is unknown. Thus, the main objective of the characterization and geotechnical modelling of these slopes is to determine the shear strength of the affected massifs. For this purpose, deformed and undeformed samples were collected from the various layers of the soil massif in a location where the phenomenon was under development. These samples were characterized physically, chemically, and mechanically. Subsequently, the massifs were recreated in reduced scale models, observing the critical conditions in which the disaster occurred, and qualitatively comparing them with slope stability computational models. The results showed that the layers are classified as silty and sandy soils, with a small fraction of clay, and that there are three types of movements associated with the fallen soils: the fall, overturning, and rotational landslide, all actively influenced by the effects of the river's ebb, saturation/percolation, and texture.

An experimental study of the unbalance compensation by voltage source inverter based STATCOM

2016 ◽  
Vol 7 (1) ◽  
pp. 45
Author(s):  
Anas Benslimane ◽  
Jamal Bouchnaif ◽  
Mohamed Azizi ◽  
Khalid Grari
Keyword(s):  
Experimental Study ◽  
High Voltage ◽  
High Speed ◽  
Power Grid ◽  
Dynamic Regime ◽  
Voltage Source ◽  
Voltage Source Inverter ◽  
High Speed Railway ◽  
Reduced Scale

This work presents an experimental study of the unbalance compensation caused by the high speed railway substations in the high-voltage power grid with a shunt voltage source inverter based STATCOM. This experimental study is realized on a reduced scale prototype. The Control of inverter is implemented in a DSP card. The practical results presented in this paper are shown the performance of unbalance compensation by VSI_STATCOM in static and dynamic regime.

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