scholarly journals Frequency response function shape differences as a sign of bricks elements destruction diagnostics

2021 ◽  
Vol 332 ◽  
pp. 01021
Author(s):  
Mariusz Żółtowski ◽  
Raimondas Šadzevičius
Keyword(s):  
Modal Analysis ◽  
Frequency Response Function ◽  
Technical State ◽  
Dynamic State ◽  
Dynamic Evolution ◽  
Technical Diagnostics ◽  
System Behavior ◽  
Evolution Time ◽  
State Evaluation ◽  
State Diagnosis

The knowledge of the dynamic state and structure of system allows describing its behavior and allows creating prognosis models of the system behavior in the function of dynamic evolution time, based on the model of the technical state symptoms growth. Most often, there are no known equations describing behaviors of the system in the function of dynamic evolution time, which accounts for the need to apply new tools to examine the dynamic state. In this article authors shows chosen problems of technical state diagnosis with the use of identification and technical diagnostics methods such as experimental modal analysis. Relations between methods of dynamic state evaluation and methods of technical state evaluation were indicated. Example modal analysis results illustrate the complexity of projecting dynamic state researches into diagnostic researches of state evaluation.

Vibrations in the Assessment of Construction State

2014 ◽  
Vol 617 ◽  
pp. 136-141 ◽  
Author(s):  
Bogdan Żółtowski ◽  
Mariusz Żółtowski
Keyword(s):  
Modal Analysis ◽  
Technical State ◽  
Dynamic State ◽  
Dynamic Evolution ◽  
Technical Diagnostics ◽  
System Behavior ◽  
Evolution Time ◽  
State Evaluation ◽  
State Diagnosis

The knowledge of the dynamic state and structure of the system allows to describe its behavior, and allows creating prognosis models of the system behavior in the function of dynamic evolution time, based on the model of the technical state symptoms growth. Most often, however, there are no known equations describing behaviors of the system in the function of dynamic evolution time, which accounts for the need to apply new tools to examine the dynamic state. There is, therefore, the requirement to experimentally verify analytical technical models as the proper one is a model which is verified in practice. An experiment is, therefore, often only an inspiration for further researches leading to the optimization of the construction. In this work presented are chosen problems of machines’ technical state diagnosis with the use of identification and technical diagnostics methods. Relations between methods of dynamic state evaluation and methods of technical state evaluation were indicated. Example modal analysis results illustrate the complexity of projecting dynamic state researches into diagnostic researches of machine state evaluation.

scholarly journals Evaluation of degradation of bricks using FRF

2017 ◽  
Vol 16 (3) ◽  
pp. 025-036
Author(s):  
Mariusz Żółtowski ◽  
Krzysztof Napieraj
Keyword(s):  
Modal Analysis ◽  
Experimental Modal Analysis ◽  
Technical State ◽  
Dynamic State ◽  
Dynamic Evolution ◽  
Technical Diagnostics ◽  
System Behavior ◽  
Evolution Time ◽  
State Evaluation ◽  
State Diagnosis

The knowledge of the dynamic state and structure of system allows to describe its behavior, and allows a model of the system behavior in the function of dynamic evolution time, based on the model of the technical state symptoms growth. Most often, there are no known equations describing behaviors of the system in the function of dynamic evolution time, which accounts for the need to apply new tools to examine the dynamic state. In this article authors shows chosen problems of technical state diagnosis with the use of identification and technical diagnostics methods such as experimental modal analysis. Relations between methods of dynamic state evaluation and methods of technical state evaluation were indicated. Example modal analysis results illustrate the complexity of projecting dynamic state researches into diagnostic researches of state evaluation.

scholarly journals Frequency Response Function Shape Differences as a Sign of Bricks Destruction – Control and Measurement

2020 ◽  
Author(s):  
Mariusz Żółtowski ◽  
Krzysztof Napieraj
Keyword(s):  
Frequency Response ◽  
Modal Analysis ◽  
Response Function ◽  
Frequency Response Function ◽  
Technical State ◽  
Dynamic State ◽  
Technical Diagnostics ◽  
State Evaluation ◽  
State Diagnosis ◽  
Function Shape

In this article authors shows chosen problems of technical state diagnosis with the use of identification and technical diagnostics methods such as experimental modal analysis. Relations between methods of dynamic state evaluation and methods of technical state evaluation were indicated. Example modal analysis results illustrate the complexity of projecting dynamic state researches into diagnostic researches of state evaluation.

scholarly journals Analysis of vibrodiagnostics methods in the technical state study of designed multimedia mobile scenes

2019 ◽  
Vol 302 ◽  
pp. 01011
Author(s):  
Marcin Łukasiewicz ◽  
Michał Liss ◽  
Natalia Dluhunovych
Keyword(s):  
Modal Analysis ◽  
Diagnostic Tests ◽  
Research Process ◽  
Technical Condition ◽  
Technical State ◽  
Normal Operation ◽  
Design Stage ◽  
Analysis Methods ◽  
State Study ◽  
Diagnostic Research

The paper presents the possibilities of using vibroacoustic methods in the study of the technical condition of designed multimedia mobile scenes. In particular, the possibility of implementing modal analysis methods in modelling and diagnostic research process has been presented. The use of virtual methods enables diagnostic tests both at the design stage and at the stage of normal operation, whereas modal methods help to explain the nature of the work of the element under investigation.

Health State Evaluation of Continuous Girder Bridge Based on Fuzzy Analytic Hierarchy Process

2012 ◽  
Vol 178-181 ◽  
pp. 2285-2289
Author(s):  
Hai Tao Li
Keyword(s):  
Analytic Hierarchy Process ◽  
Technical State ◽  
Fuzzy Analytic Hierarchy Process ◽  
Health Evaluation ◽  
Health State ◽  
Fuzzy Evaluation ◽  
Analytic Hierarchy ◽  
State Evaluation ◽  
Degree Of Membership ◽  
Hierarchy Process

Based on fuzzy analytic hierarchy process, The model of bridge health evaluation is established using the quantification relations between the bridge technical state evaluation grade and degree of membership function of bridge health evaluation, making use of the computed result of various index of degree of membership value and weight, obtains all levels of fuzzy evaluation collection. According to the maximum membership principles to evaluate the technical state grade of bridge structure the corresponding level, and with its result to instruct the decision-making of bridge maintenance and strengthening.

scholarly journals Assessment on the Technical State of Spillway Concrete Gravity Dams in Lithuania

2021 ◽  
Vol 28 (1) ◽  
pp. 106-117
Author(s):  
Raimondas Šadzevičius ◽  
Rytis Skominas ◽  
Algirdas Radzevičius
Keyword(s):  
Concrete Structure ◽  
Protective Layer ◽  
Technical State ◽  
Reinforcement Corrosion ◽  
Gravity Dams ◽  
Concrete Corrosion ◽  
State Research ◽  
Concrete Gravity Dams ◽  
State Evaluation ◽  
Deterioration Process

Spillway concrete gravity dams are exposed by loads and environment causing deterioration process. The article presents the concrete structure deteriorations, defects and technical state evaluation results of 34 Lithuanian spillway concrete gravity dams performed in 2006–2018. The typical deteriorations are: in piers’– crumbled protective layer of concrete, its corrosion, reinforcement corrosion, cracks in concrete, chipped edges; in spillway constructions’– concrete corrosion, bio–corrosion, concrete corrosion caused by cavitation; in outflow constructions – concrete corrosion, bigger cracks and deformations. According to results of technical state research, it was found that only 3% (1 SCGD) dams are in good technical state, 27% (9 SCGD) – moderate, 47% (16 SCGD) – satisfactory, 12% (4 SCGD) – unsatisfactory and 12% (4 SCGD) – in critical state.

The Technical State Evaluation and Protection Measures Development for the Refectory Chamber Building with the Church of the National Kyiv-Pechersk Reserve

2021 ◽  
pp. 1018-1029
Author(s):  
Yurii Melashenko ◽  
Asia Kisil ◽  
Yurii Ishchenko ◽  
Yevheniia Pavliuk ◽  
Nicolay Marienkov
Keyword(s):  
Technical State ◽  
Protection Measures ◽  
State Evaluation ◽  
The Church
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