Vibrations in the Assessment of Construction State

Abstract

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.

The Use of Modal Analysis in Addition Percentage Differentiation, and Mechanical Properties of Ordinary Concretes with the Addition of Fly Ash from Sewage Sludge

“…When such a correlation occurs, it can be stated that the object is fit. In the absence of correlation, the object is in a state of unfitness, caused, for example, by aging or damage [ 38 , 39 , 50 , 51 , 52 ].…”

Vibration measures in the diagnostics of technical systems

“…To implement this project proposed in the work of the author's methodology dedicated research facilities in the "construction" [1,2,9] uses redundancy procedures, OPTIMUM, SVD and modeling cause -effect [7,20].…”

“…The use of composite measurements mapping the interactions measured vibration process is simpler and less subject to error than the complicated procedures simulation based on numerical methods [9,10,20].…”

Methodology of machine destruction testing

“…A usable machine can perform tasks it is designed with simultaneous maintenance of parameters specified in its technical documentation. Due to the impact of the environment and performance of the assigned tasks the object initial properties can be changed in the following way [26]:…”