Quality identification methodology applied to wall-elements based on modal analysis

Abstract

Article information:To cite this document: Mariusz Zóltowski Ronald M. Martinod , (2015),"Quality identification methodology applied to wallelements based on modal analysis", Multidiscipline Modeling in Materials and Structures, Vol. 11 Iss 4 pp. 507 -516 Permanent link to this document: http://dx. AbstractPurpose -The recommendation of structural standards, e.g. PN-B-03002, shows a need to control the production quality of wall-elements; the quality control demands suitable guidelines to fit the requirements of the current mass-production of the wall-elements, then, the structural standard recognizes the need of improving the methods to identify the real elements quality. The paper aims to discuss these issues. Design/methodology/approach -The proposed inspection methodology corresponds to assessment models that combine the numerical and symptomatic models to evaluate the critical levels of wall-elements, based on non-intrusive tests through the measurement of a set of signals, using the Experimental Modal Analysis (EMA)-based techniques. Findings -The presented work is developed with an approach that applies advanced calculating techniques used for the structural analysis in civil engineering focused on the technical state assessment. Originality/value -The paper proposes a diagnostic methodology that can be added to the current regulations and standards based on EMA techniques.

Vibration measures in the diagnostics of technical systems

“…The FRF is a complex function of the frequency, which the module shows the characteristics of amplitude -the frequency, and the argument is the angle of the phase shift between the power of forcing a response [7,13,17]. The FRF is an inversion of the transmittance, which is an important observation resulting from the analysis and testing of these measures global propagation of energy [19].…”

Vibration tests of wall segments

“…Carried exemplification of methods on a group of masonry segments determines the model inference in terms of quality degradation of the studied masonry segments, and confirms the accuracy and efficiency of the vibration research methodology development for construction industry [9,13,14].…”

“…This results, consequently, the power dissipation of the waves, the diffraction, reflection, and the overlap. As a result, the existence of the input and execution states representing the transition characteristics and properties of the structure is formed that can be measured by a number of symptoms characteristic of the processes included in the output [2,5,6,12,14]. For verification tests author selected wall segments made of ceramic elements, which for the purposes of this study were determined depending on the manner of their execution, as in Table 1.…”

Mutual measures of vibration process in differentiating examined construction state

“…Estimator function is a signal that can be obtained by averaging in the time domain and examining the mutual relationship between the two segments of the delayed time interval T. It has the following form [16,18,19]:…”

“…The problem description and study of changes in the components destruction, materials, design and construction are carried out using the measurement of simple and complex vibration diagnostics methods based on modal analysis. An important issue here is the description and propagation study of useful vibration energy is already widely used in diagnostic vibration and a little less used in modal analysis methods [16][17][18].…”