Method of two-stage complex diagnostics of digital substations on the basis of the full-scale-model tests theory

2017 ◽  
Author(s):  
R. Oganyan ◽  
N. Narakidze ◽  
D. Shaykhutdinov
Keyword(s):  
Model Tests ◽  
Full Scale ◽  
Scale Model ◽  
Two Stage

Full scale model tests on slab track constructed on embankment

2012 ◽  
pp. 547-553 ◽  
Author(s):  
Jiang Hongguang ◽  
Bian Xuecheng ◽  
Chen Yunmin ◽  
Jiang Jianqun
Keyword(s):  
Model Tests ◽  
Full Scale ◽  
Scale Model ◽  
Slab Track

Evaluation of a Small and Fast Planing Boat’s Seakeeping Performance at the Design Stage

2015 ◽  
Author(s):  
Dong Jin Kim ◽  
Sun Young Kim
Keyword(s):  
Model Tests ◽  
Full Scale ◽  
Scale Model ◽  
Design Stage ◽  
Small Scale ◽  
Irregular Wave ◽  
Seakeeping Performance ◽  
Head Waves ◽  
Scale Ratio ◽  
Free Running

Seakeeping performance of a planing boat should be sufficiently considered and evaluated at the design stage for its safe running in rough seas. Model tests in seakeeping model basins are often performed to predict the performance of full-scale planing boats. But, there are many limitations of tank size and wave maker capacity, in particular, for fast small planing boats due to small scale ratio and high Froude numbers of their scale models. In this research, scale model tests are tried in various test conditions, and results are summarized and analyzed to predict a 3 ton-class fast small planing boats designed. In a long and narrow tank, towing tests for a bare hull model are performed with regular head waves and long crested irregular head waves. Motion RAOs are derived from irregular wave tests, and they are in good agreements with RAOs in regular waves. Next, model ships with one water-jet propulsion system are built, and free running model tests are performed in ocean basins. Wave conditions such as significant heights, modal periods, and directions are varied for the free running tests. Motion RMS values, and RAOs are obtained through statistical approaches. They are compared with the results in captive tests for the bare hull model, and are used to predict the full-scale boat performances.

scholarly journals Four Full-Scale Model Tests of Geosynthetic-Reinforced Soil Structure Carried out in Kanazawa, Japan

1998 ◽  
Vol 13 ◽  
pp. 31-40
Author(s):  
Yukihiro Kumagai ◽  
Yoshihiro Yokota ◽  
Hisashi Kawai ◽  
Hideki Ohta ◽  
Takayuki Yamagami
Keyword(s):  
Soil Structure ◽  
Model Tests ◽  
Reinforced Soil ◽  
Full Scale ◽  
Scale Model ◽  
Geosynthetic Reinforced Soil

scholarly journals DESIGN AND FULL SCALE MODEL TESTS OF INTERNAL ANCHORAGES FOR LARGE EXTERNAL PRESTRESSING TENDONS

2003 ◽  
pp. 105-119
Author(s):  
Hiroyuki IKEDA ◽  
Hiroshi SHIRATANI ◽  
Yoshiaki IMAI ◽  
Koichi KANO
Keyword(s):  
Model Tests ◽  
Full Scale ◽  
Scale Model ◽  
External Prestressing

Rotor Scale Model Tests for Power Conversion Unit of GT-MHR

2008 ◽  
Author(s):  
C. B. Baxi ◽  
N. G. Kodochigov ◽  
S. E. Belov ◽  
M. N. Borovkov
Keyword(s):  
Power Conversion ◽  
Model Tests ◽  
Suspension System ◽  
Full Scale ◽  
Magnetic Bearings ◽  
Scale Model ◽  
Small Scale ◽  
Conversion Unit ◽  
Electro Magnetic ◽  
Rotor Model

A power-generating unit with the high-temperature helium reactor (GT-MHR) has a turbomachine (TM) that is intended for both conversion of coolant thermal energy into electric power in the direct gas-turbine cycle, and provision of helium circulation in the primary circuit. The vertically oriented TM is placed in the central area of the power conversion unit (PCU). TM consists of a turbocompressor (TC) and a generator. Their rotors are joined with a diaphragm coupling and supported by electro-magnetic bearings (EMB). The complexity and novelty of the task of the full electromagnetic suspension system development requires thorough stepwise experimental work, from small-scale physical models to full-scale specimen. On this purpose, the following is planned within the framework of the GT-MHR Project: investigations of the “flexible” rotor small-scale mockup with electro-magnetic bearings (“Minimockup” test facility); tests of the radial EMB; tests of the position sensors; tests of the TM rotor scale model; tests of the TM catcher bearings (CB) friction pairs; tests of the CB mockups; tests of EMB and CB pilot samples and investigation of the full-scale electromagnetic suspension system as a part of full-scale turbocompressor tests. The rotor scale model (RSM) tests aim at investigation of dynamics of rotor supported by electromagnetic bearings to validate GT-MHR turbomachine serviceability. Like the full-scale turbomachine rotor, the RSM consist of two parts: the generator rotor model and the turbocompressor rotor model that are joined with a coupling. Both flexible and rigid coupling options are tested. Each rotor is supported by one axial and two radial EMBs. The rotor is arranged vertically. The RSM rotor length is 10.54 m, and mass is 1171 kg. The designs of physical model elements, namely of the turbine, compressors, generator and exciter, are simplified and performed with account of rigid characteristics, which are identical to those of the full-scale turbomachine elements.

scholarly journals WAVE IMPACTS AT SMALL AND REAL SCALE FOR THE STEPPED SLOPED SEAWALL DESIGN AT DEN OEVER

2018 ◽  
pp. 51
Author(s):  
Gosse Jan Steendam ◽  
Jentsje Van der Meer ◽  
Paul Van Steeg ◽  
Ruud Joosten
Keyword(s):  
Scale Effects ◽  
Model Tests ◽  
Full Scale ◽  
Scale Model ◽  
Wave Loading ◽  
Sensor Signals ◽  
Real Scale

The dike in Den Oever has to be improved. To keep the dike as low as possible and to make it suitable for other uses, the choice was made to install a stepped revetment on the sea side. In order to determine the design wave loading, scale model tests and tests at full scale were performed. The comparison shows that loads, as a result of model and scale effects and by averaging the sensor signals, could be decreased by a factor 4 relative to the scale model tests.

Design and Testing of Scale Model Wind Turbines for Use in Wind/Wave Basin Model Tests of Floating Offshore Wind Turbines

2013 ◽  
Author(s):  
Matthew J. Fowler ◽  
Richard W. Kimball ◽  
Dale A. Thomas ◽  
Andrew J. Goupee
Keyword(s):  
Wind Turbine ◽  
Wind Turbines ◽  
Model Tests ◽  
Full Scale ◽  
Offshore Wind ◽  
Scale Model ◽  
Offshore Wind Turbines ◽  
Floating Offshore Wind Turbines ◽  
Wave Basin ◽  
Scale Design

Model basin testing is a standard practice in the design process for offshore floating structures and has recently been applied to floating offshore wind turbines. 1/50th scale model tests performed by the DeepCwind Consortium at Maritime Research Institute Netherlands (MARIN) in 2011 on various platform types were able to capture the global dynamic behavior of commercial scale model floating wind turbine systems; however, due to the severe mismatch in Reynolds number between full scale and model scale, the strictly Froude-scaled, geometrically similar wind turbine underperformed greatly. This required significant modification of test wind speeds to match key wind turbine aerodynamic loads, such as thrust. To execute more representative floating wind turbine model tests, it is desirable to have a model wind turbine that more closely matches the performance of the full scale design. This work compares the wind tunnel performance, under Reynolds numbers corresponding to model test Froude-scale conditions, of an alternative wind turbine designed to emulate the performance of the National Renewable Energy Laboratory (NREL) 5 MW turbine. Along with the test data, the design methodology for creating this wind turbine is presented including the blade element momentum theory design of the performance-matched turbine using the open-source tools WT_Perf and XFoil. In addition, a strictly Froude-scale NREL 5 MW wind turbine design is also tested to provide a basis of comparison for the improved designs. While the improved, performance-matched turbine was designed to more closely match the NREL 5 MW design in performance under low model test Reynolds numbers, it did not maintain geometric similitude in the blade chord and thickness orientations. Other key Froude scaling parameters, such as blade lengths and rotor operational speed, were maintained for the improved designs. The results of this work support the development of protocols for properly designing scale model wind turbines that emulate the full scale design for Froude-scale wind/wave basin tests of floating offshore wind turbines.

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