Numerical-experimental research of technological equipment foundations in dynamic impact conditions
DOI:
https://doi.org/10.15587/2312-8372.2019.183264Keywords:
survey of the structure, vibration diagnostics, natural frequencies of vibrations, cracking, dynamic loading, finite element modelAbstract
When designing new production workshops or reconstructing existing ones, the urgent issue is to take into account not only all static loads, but also possible dynamic effects caused by unsteady operation of technological equipment. In the work, on the example of examining the technical condition of an industrial building, the structures of which are subjected to dynamic effects from the action of technological equipment, an experimental-numerical approach to modeling the design situation, determining the causes of deformations and choosing a reinforcement method are considered. The object of research is the process of dynamic deformation of a separately located foundation of technological equipment – a woodworking machine, in the conditions of existing production. The research is aimed at finding a constructive solution to the problem of transferring vibrations from the machine’s engines through its own foundation and soil base to the foundations and load-bearing elements of the building of the production workshop. The main idea of the experimental-numerical approach is a comparison of the results of numerical and field measurements of vibration parameters. Numerical analysis is performed on the basis of finite element calculation using modern software systems, field measurements are vibration records recorded using a seismograph, based on which the vibration spectra of the structure are constructed, from which the dominant vibration frequencies are determined. The phenomena of the internal resonance of the structure, discovered on the basis of comparisons of the results, make it possible to clearly formulate the causes of cracks in the structural elements.
The research results are used in the design of new and restoration of existing bases of technological equipment during the overhaul of the construction of the workshop and technical re-equipment of production.
The application of an experimental-numerical approach for the analysis of initial data in the design or reconstruction of structures, in the presence of unsteady vibrodynamic loads, allows to build a mathematical model as close as possible to the real one. The obtained research results can be used in the development of methods and technologies for diagnosing supporting and enclosing structures of structures under the influence of dynamic load.
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Copyright (c) 2019 Maksim Vabischevich, Oleg Dedov, Oleksandr Glitin
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