Standard inspection program and evaluation criteria of the technical condition of generators

1999 ◽  
Vol 33 (11) ◽  
pp. 630-631
Author(s):  
L. G. Mamikonyants ◽  
S. S. Ananyants ◽  
B. V. Kislitskii ◽  
A. B. Netseevskii
Keyword(s):  
Evaluation Criteria ◽  
Technical Condition

scholarly journals TECHNICAL CONDITION ANALYSIS OF SAINT-PETERSBURG OPERATED REINFORCED CONCRETE BRIDGE CONSTRUCTIONS

2017 ◽  
Vol 2 (3) ◽  
pp. 37-44 ◽  
Author(s):  
Белый ◽  
Andrey Belyy
Keyword(s):  
Reinforced Concrete ◽  
Present Article ◽  
Evaluation Criteria ◽  
Technical Condition ◽  
Concrete Bridge ◽  
Saint Petersburg ◽  
Reinforced Concrete Bridge ◽  
Long Time ◽  
The City

St. Petersburg possesses a large number of bridge constructions operated throughout a long time. Mainly these are objects made of reinforced concrete. Among bridges of the city there is a set of unique constructions. Specifics of bridges maintenance in megalopolis environment are characterized by difficult climatic and technogenic conditions. It causes emergence and development of numerous defects and damages in designs. For development of scientifically based techniques of assessment and forecasting of technical condition of the operated bridge constructions (in particular, reinforced concrete) the authentic and urgent analysis of this state is necessary. It is possible to execute it, having formulated the corresponding criteria and methods of assessment, and also having created a certain methodology of the analysis, as it is executed in the present article. Six evaluation criteria on which it is possible to carry out complex diagnostics of bridges of St. Petersburg are designated. Results of the analysis confirm need of special approaches to operation of megalopolises bridges park and also on a large number of constructions with extremely unsatisfactory technical condition.

scholarly journals EXPERIMENTALSTUDY OF DYNAMIC EFFORTS DURING THE OPERATION OF THE MECHANISM OF MOVEMENT OF THE CARGO TROLLEYOF AN OVERHEAD CRANE

2021 ◽  
pp. 60-69
Author(s):  
Nataliia Fidrovska ◽  
Evgen Slepuzhnikov ◽  
Roman Ponomarenko ◽  
Dmytro Kozodoi
Keyword(s):  
Friction Pair ◽  
Evaluation Criteria ◽  
Rolling Friction ◽  
Technical Condition ◽  
Overhead Crane ◽  
Rail Track ◽  
Stage Of Development ◽  
Rolling Surface ◽  
Running Wheels ◽  
Shock Pulses

The article deals with the determination of the dynamic loads arising in the running wheels of a conventional (standard) and modernized design during the movement of the cargo carriage of an overhead crane. The redesigned wheel has an insert made from 7-7130 rubber compound. Also, a method for diagnosing running wheels of conventional and modernized design was determined. The ZETLAB program was chosen as a program for signal registration and analysis. This program allows not only displaying the signal in real time with the possibility of scaling, but also allows you to digitize the signal with the possibility of further processing the results in various standards. Finding out the occurrence of a defect in wheels and rails is mainly carried out by two methods, when shock pulses appear and according to an increased background of vibration. In practice, there is a process of "dry" rolling friction, and this means that the method of shock pulses for diagnosing the condition of wheels and a rail track can be used only in some cases in the form of extreme wear of the friction pairs of a wheel and a rail. That is, the method of spectral analysis of fluctuations in the power of random vibration can be successfully applied to diagnose the state of the rail track and crane wheel.  The diagnostic method based on the overall vibration level allows for an overall assessment of the technical condition. Such diagnostics makes it possible to identify defects only at the very last stage of development, when they lead or have already led to partial destruction of the rolling surface of the wheel and the surface of the rail, that is, to an increase in the overall level of vibration. The performance evaluation criteria are fully focused on the corresponding standard vibration levels for the investigated friction pair. A friction pair is considered to be defective, the vibration of which exceeds the general standard. When determining an increased overall level of vibration, maintenance personnel must make a decision to replace parts or a unit to prolong its operation. The results obtained indicate the advisability of using the wheels of the modernized design on the cargo carriage of an overhead crane.

scholarly journals EVALUATION CRITERIA FOR MANAGING THE TECHNICAL STATE BY THE EXAMPLE OF BUILDING A BOILER IN ROSTOV-ON-DON

2018 ◽  
Vol 6 (3) ◽  
pp. 10-14
Author(s):  
Максим Клименко ◽  
Maksim Klimenko ◽  
Мария Клименко ◽  
Mariya Klimenko
Keyword(s):  
System Analysis ◽  
Evaluation Criteria ◽  
Boiler House ◽  
Data Bank ◽  
Technical Condition ◽  
Emergency Situations ◽  
Building Management ◽  
General Technical ◽  
Design Construction

In this article, the evaluation criteria (general technical condition, durability, conditional reliability) of construction objects are considered on the example of a boiler house in Rostov-on-Don. On the basis of the system analysis, a classification of characteristics is made and classification of the parameters of the construction object is made, where the main errors in the design, construction and operation are identified, and the logical and probabilistic relationships between them are identified, which made it possible to establish the possibility of the onset of critical events and states that They create emergency situations (accidents). The estimated building management criteria allow the formation of a data bank with the help of which it is planned to calculate the criteria and make decisions when operating.

Efficiency of application of the phase-chronometric method and neurodiagnostics for monitoring the degradation of rolling bearings during operation

2020 ◽  
pp. 43-50
Author(s):  
A.S. Komshin ◽  
K.G. Potapov ◽  
V.I. Pronyakin ◽  
A.B. Syritskii
Keyword(s):  
Life Cycle ◽  
Wavelet Analysis ◽  
Metrological Support ◽  
Rolling Bearing ◽  
Technical Condition ◽  
Measurement Information ◽  
Rolling Bearings ◽  
Vibration Diagnostics ◽  
Bearing Life ◽  
Alternative Approach

The paper presents an alternative approach to metrological support and assessment of the technical condition of rolling bearings in operation. The analysis of existing approaches, including methods of vibration diagnostics, envelope analysis, wavelet analysis, etc. Considers the possibility of applying a phase-chronometric method for support on the basis of neurodiagnostics bearing life cycle on the basis of the unified format of measurement information. The possibility of diagnosing a rolling bearing when analyzing measurement information from the shaft and separator was evaluated.

Analysis of the technical condition of the hydrotreatment block of catalytic reforming unit

2019 ◽  
Vol 03 (03) ◽  
pp. 16-19
Author(s):  
E.K. Mukhutdinova ◽  
◽  
K.G. Abdul'minev ◽  
A.I. Kolyshkina ◽  
V.R. Tukaev ◽  
...  
Keyword(s):  
Technical Condition ◽  
Catalytic Reforming

Transformation of evaluation criteria of lands withdrawn from agricultural turnover due to radioactive contamination

2020 ◽  
pp. 23-27
Author(s):  
Olga Merzlova
Keyword(s):  
Economic Evaluation ◽  
Radioactive Contamination ◽  
Chernobyl Accident ◽  
Evaluation Criteria ◽  
Contaminated Land ◽  
Degradation Processes ◽  
Agricultural Use ◽  
Land Clearance

One of the measures to eliminate the consequences of the Chernobyl accident was the exclusion of highly contaminated land from agricultural use. Due to the positive dynamics of the radiation situation, the issue of land return becomes relevant. However, in the period of exclusion of these lands the land clearance degradation processes were developing. The second part of the article is devoted to the issue of economic evaluation of the expediency of land return and the mutual coordination of the results of separate stages of complex ecological and economic evaluation. The research was carried out in Mogilev branch Institute of radiology (Republic of Belarus).

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