RESULTS OF STUDIES OF OPERATION OF SPECIAL IMPEDANCE TRANSDUCERS ON THE RIGID METAL STRUCTURES OF REAL PRODUCED OBJECTS

2020 ◽  
pp. 44-49
Author(s):  
A. A. Arcentiev ◽  
A. M. Konovalov ◽  
V. I. Kugushev ◽  
S. S. Khudyakov
Keyword(s):  
Cooling System ◽  
Aggressive Medium ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Natural Oscillations ◽  
Energy Redistribution ◽  
Metal Structures ◽  
Mechanical Filter ◽  
Oscillation Frequencies ◽  
Non Destructive

The paper presents the studies of capabilities of special impedance transducers with mechanical filter of oscillation frequencies at the input (output) as a tool of non-destructive testing of real produced objects. Objects under test were elements of a power reactor, which are exposed to high temperature aggressive medium and which are inaccessible for direct contact because of the cooling system. The use of special transducers allowed the development of a new method, which used natural oscillations of the object under test and, thus, provided a mean for monitoring of inaccessible elements of the structure. The method is based on fixation of energy redistribution by the modes of natural oscillations of the object under test, when exposed to damping factors caused by cracks, erosion and other defects. It is shown, how this method operates, when using an artificial damper and in presence of real defects. The use of the artificial damper made it possible to determine that this method allowed the non-destructive testing over the entire surface of the monitored element of the structure.

Use of Special Impedance Converters for Non-Destructive Testing of Rigid Metal Structures

2019 ◽  
pp. 45-53
Author(s):  
Aleksei Aleksandrovich Arsentiev ◽  
Aleksandr Mikhailovich Konovalov ◽  
Vladimir Ilyich Kugushev ◽  
S.S. Khudiakov
Keyword(s):  
Non Destructive Testing ◽  
Destructive Testing ◽  
Metal Structures ◽  
Non Destructive

scholarly journals Investigation of the Influence of a Cavity Type Defect on the Frequencies of the Natural Rail Oscillations by the Radar Method

2019 ◽  
pp. 1006-1012
Author(s):  
Vadim S. Potylitsyn ◽  
Danil S. Kudinov ◽  
Ekaterina A. Kokhonkova
Keyword(s):  
Doppler Radar ◽  
Natural Oscillation ◽  
Rolling Stock ◽  
Destructive Testing ◽  
Natural Oscillations ◽  
Type Defect ◽  
Radar Method ◽  
Impulse Load ◽  
Oscillation Frequencies ◽  
Non Destructive

Currently, the problem of non-destructive testing of rail lashes or rolling stock is quite acute, as the demands of both speed characteristics and vehicle safety increase every year. Thus, the purpose of this study was to determine the possibility of recording frequencies of natural oscillations by the radar method for rail lashes and the influence of the dimensions of the cavity-type defect. For this purpose, a laboratory bench was created with a standard rail, the length of 1.19 m of the P-65 brand, in which free oscillations were excited using a shock impulse load. Measurements of natural oscillation frequencies of the rail were recorded on a 24-bit ADC and a specialized accelerometer ZETLAB BC110. To register the oscillations, a Doppler radar with a frequency of 10 GHz was used, which was installed at the focus of a parabolic mirror offset antenna with a 1.6-meter diameter. It was found that a “field” defect shifts the frequency mode of oscillation 750 Hz upwards. It is shown that the hole in the rail neck with a diameter of 10 mm makes a change in the frequency of about 14 Hz

Some Evaluations on the Technical State of Metal Products and Determination of their Safe Operation Period on the Basis of Criterial Control

2022 ◽  
Vol 1049 ◽  
pp. 275-281
Author(s):  
Vladimir Gadalov ◽  
Irina Vornacheva ◽  
Sergey Safonov ◽  
Damir Nuretdinov ◽  
Victoria Alexandrovna Sokolova ◽  
...  
Keyword(s):  
Technical Condition ◽  
Non Destructive Testing ◽  
Labor Costs ◽  
Destructive Testing ◽  
Resource Saving ◽  
Metal Structures ◽  
Bridge Structures ◽  
Metal Products ◽  
Metal Microstructure ◽  
Non Destructive

Over a long period of operation, under the influence of corrosion and stresses from the acting forces, metal structures lose their strength. There is a need for their periodic non-destructive testing. The development of new methods is relevant in the field of control of building metal structures, such as bridge structures, structures of building cranes and other mechanical engineering products. The applied methods should be reliable and should not require huge material and labor costs. In this work, informational relationships between acoustic characteristics and parameters of metal microstructure are established. The proposed method can be useful for specialists and experts in the field of monitoring the technical condition of metal products requiring non-destructive testing. The safety of the operated objects depends on the accuracy of the applied criteria, as well as the degree of resource saving due to the full use of the product resource.

scholarly journals Evaluation of the Technical Condition of Power Structures of Launch Complexes at the Cosmodrome Plesetsk

2019 ◽  
pp. 45-50
Author(s):  
L.V. Ertman ◽  
M.Y. Erofeev
Keyword(s):  
Technical Condition ◽  
Development Plan ◽  
Non Destructive Testing ◽  
Power Structures ◽  
Stages Of Development ◽  
Destructive Testing ◽  
Metal Structures ◽  
Early Stages ◽  
Survey Results ◽  
Non Destructive

The article deals with the issues of inspection and evaluation of the technical condition of power metal structures of systems and units of the launch complexes at the cosmodrome Plesetsk. An analysis of specific features of operation of metal structures at the cosmodrome’s launch complexes and the main types of defects occuring in these structures is carried out. The methods and means of non-destructive testing used in the inspection of the metal structures and assemblies are described. These methods can help to identify defects at the early stages of development, plan and take timely measures to eliminate the defects and reduce the risk of sudden failures of the systems and units. The article provides practical examples of the survey results using the methods and means of non-destructive testing of metal structures of systems and units of the launch complexes 17P32 and 14P25.

scholarly journals DEVELOPMENT OF ACOUSTIC CONTROL METHOD FOR STEEL STRUCTURES CHANGES DETECTION AND EVALUATION

2019 ◽  
pp. 27-30 ◽  
Author(s):  
N. I. Chaban ◽  
I. V. Rybitskyi ◽  
V. D. Myndiuk
Keyword(s):  
Structural Changes ◽  
Control Method ◽  
Steel Structures ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Metal Structures ◽  
Advantages And Disadvantages ◽  
Acoustic Control ◽  
Changes Detection ◽  
Non Destructive

Detection of defects at the stage of their origination, specifically at the stage of structural changes in the metal structures material, is the current issue. The main methods for determining the structural changes in the material of metal structures are considered, their advantages and disadvantages are analyzed, a new method for determining the structural changes using modern methods of non-destructive testing, namely ultrasonic phased arrays is proposed.

Non destructive testing of works of art by terahertz analysis

2013 ◽  
Vol 64 (2) ◽  
pp. 21001 ◽  
Author(s):  
Jean-Luc Bodnar ◽  
Jean-Jacques Metayer ◽  
Kamel Mouhoubi ◽  
Vincent Detalle
Keyword(s):  
Non Destructive Testing ◽  
Destructive Testing ◽  
Works Of Art ◽  
Non Destructive
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