Test results of resonant single wire system transmitting power to the infrastructure objects of the JSC “RZD”

2018 ◽  
Vol 77 (5) ◽  
pp. 295-300 ◽  
Author(s):  
D. V. Ermolenko ◽  
L. Yu. Yuferev ◽  
O. A. Roshchin
Keyword(s):  
Test Results ◽  
Single Wire ◽  
Wire System

scholarly journals Distal Anchoring Technique in Single Wire System Using Novel Short Track Sliding Balloon Catheter

2021 ◽  
Vol 14 (3) ◽  
pp. e27-e29
Author(s):  
Daehoon Kim ◽  
Jung-Sun Kim ◽  
Seung-Jun Lee ◽  
Sung-Jin Hong ◽  
Chul-Min Ahn ◽  
...  
Keyword(s):  
Balloon Catheter ◽  
Single Wire ◽  
Wire System ◽  
Anchoring Technique

Experimental Study of High Temperature Performance of Steel Suspension Bridge Wires

2019 ◽  
Author(s):  
Jumari A. Robinson ◽  
Adrian Brügger ◽  
Raimondo Betti
Keyword(s):  
Elastic Modulus ◽  
High Temperature ◽  
High Strength Steel ◽  
Cold Working ◽  
High Strength ◽  
Suspension Bridge ◽  
Theoretical Models ◽  
Test Results ◽  
Single Wire ◽  
Steel Wires

<p>The performance of suspension bridges exposed to fire hazards is severely under-studied – so much so that no experimental data exists to quantify the safety of a suspension bridge during or after a major fire event. Bridge performance and safety rely on the integrity of the main cable and its constituent high-strength steel wires. Due to the current lack of experimental high temperature data for wires, the theoretical models use properties and coefficients from data for other types of structural steel. No other structural steel undergoes the amount of cold-working that bridge wire does, and plastic strains from cold-working can be relieved at high temperature, drastically weakening the steel. As such, this work determines the elastic modulus, ultimate strength, and general thermo-mechanical profile of the high-strength steel wires in a range of elevated temperature environments. Specifically, these tests are conducted on a bundle of 61-wires (transient), and at the single wire level (steady-state) at a temperature range of approximately 20-700°C. The test results show an alarmingly high reduction in the elastic modulus and ultimate strength with increased temperature. The degradation shown by experiments is higher than predicted by current theoretical models, indicating that use of high-temperature properties of other types of steel is not sufficient. The test results also show scaling agreement between the single wire and the 61-wire bundle, implying that a full material work up at the single- wire level will accurately inform the failure characterization of the full cable.</p>

scholarly journals An Evaluation of Shock Waves in Unsaturated Wet Snow

1983 ◽  
Vol 4 ◽  
pp. 241-245 ◽  
Author(s):  
A. Sato ◽  
R. L. Brown
Keyword(s):  
Shock Waves ◽  
Wave Attenuation ◽  
Free Water ◽  
Experimental Program ◽  
Test Results ◽  
Wave Generator ◽  
Wet Snow ◽  
Wire System ◽  
Test Impact ◽  
Snow Samples

The propagation of shock waves in unsaturated wet snow is investigated, both analytically and experimentally.The experimental program was carried out in the laboratory with an electromagnetic stress-wave generator. During each test, impact velocity was measured at the base of the specimen by means of a contacting wire system. Also, pressure was measured at the opposite end with a piezo-resistive pressure transducer with a flat response from below 0.5 to above 100 kHz.Densities of snow samples in the range from 200 to 500 kg m−3were tested. Impact velocities at the base were varied from 20 to as high as 100 rns−1. Propagation distances (specimen lengths) were varied from 2 to 5 cm. Also, for each test, the free water moisture content in the test specimen was carefully measured so that the effect of this property could be evaluated. The test results are reported and the wave attenuation rates are characterized in terms of the parameters discussed above. In addition, these results are compared to test results for dry snow.Finally, wave propagation theory is used to evaluate the material tangent modulus. The theory is also used to calculate particle velocity and density increases produced by the shock waves. The results are compared to those obtained earlier for dry snow.

scholarly journals An Evaluation of Shock Waves in Unsaturated Wet Snow

1983 ◽  
Vol 4 ◽  
pp. 241-245
Author(s):  
A. Sato ◽  
R. L. Brown
Keyword(s):  
Shock Waves ◽  
Wave Attenuation ◽  
Free Water ◽  
Experimental Program ◽  
Test Results ◽  
Wave Generator ◽  
Wet Snow ◽  
Wire System ◽  
Test Impact ◽  
Snow Samples

The propagation of shock waves in unsaturated wet snow is investigated, both analytically and experimentally.The experimental program was carried out in the laboratory with an electromagnetic stress-wave generator. During each test, impact velocity was measured at the base of the specimen by means of a contacting wire system. Also, pressure was measured at the opposite end with a piezo-resistive pressure transducer with a flat response from below 0.5 to above 100 kHz.Densities of snow samples in the range from 200 to 500 kg m−3 were tested. Impact velocities at the base were varied from 20 to as high as 100 rns −1. Propagation distances (specimen lengths) were varied from 2 to 5 cm. Also, for each test, the free water moisture content in the test specimen was carefully measured so that the effect of this property could be evaluated. The test results are reported and the wave attenuation rates are characterized in terms of the parameters discussed above. In addition, these results are compared to test results for dry snow.Finally, wave propagation theory is used to evaluate the material tangent modulus. The theory is also used to calculate particle velocity and density increases produced by the shock waves. The results are compared to those obtained earlier for dry snow.

Observation of particle trajectories in an HGMS single-wire system

1980 ◽  
Vol 16 (1) ◽  
pp. 149-154 ◽  
Author(s):  
H. Schewe ◽  
M. Takayasu ◽  
F. Friedlaender
Keyword(s):  
Single Wire ◽  
Particle Trajectories ◽  
Wire System

Using Conventional Articulation Tests With Highly Unintelligible Children

1992 ◽  
Vol 23 (1) ◽  
pp. 52-60 ◽  
Author(s):  
Pamela G. Garn-Nunn ◽  
Vicki Martin
Keyword(s):  
Test Results ◽  
Phonological Processes ◽  
Rule Based ◽  
Severity Level ◽  
Error Sensitivity ◽  
Conventional Tests ◽  
Severity Levels ◽  
Conventional Test ◽  
Impaired Children

This study explored whether or not standard administration and scoring of conventional articulation tests accurately identified children as phonologically disordered and whether or not information from these tests established severity level and programming needs. Results of standard scoring procedures from the Assessment of Phonological Processes-Revised, the Goldman-Fristoe Test of Articulation, the Photo Articulation Test, and the Weiss Comprehensive Articulation Test were compared for 20 phonologically impaired children. All tests identified the children as phonologically delayed/disordered, but the conventional tests failed to clearly and consistently differentiate varying severity levels. Conventional test results also showed limitations in error sensitivity, ease of computation for scoring procedures, and implications for remediation programming. The use of some type of rule-based analysis for phonologically impaired children is highly recommended.

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