Read in №11 of 2019 year "Research of Vibroacoustic Characteristics in the Operator Working Area During Welds Abrasive Treatment"

25 ноя 2019


The results are presented concerning the experimental studies of noise and vibration spectra during abrasive treatment of welded joints of the body and rod structures. Welding is related to one of the most popular technologies for joining metal structures. One of the mandatory steps after welding operations is the weld dressing. Mechanical grinding of the weld after welding due to its accessibility is very popular. The studies were carried out both at manual abrasive treatment of the welds, and on the flat-grinding machines in the open space, and in the conditions of industrial premises. In the course of experimental studies, dangerous and harmful production factors arising during welded structures processing were established. The spectral composition of the acoustic characteristics was identified. Based on the results of measurements, the empirical dependence was obtained related to the vibration reduction depending on the distance to the source on the rod elements and body structures. The obtained data are confirmed by the correctness of theoretical conclusions on the regularities of the formation of noise and vibration spectra, as well as the contribution of noise sources to the sound field at the operator workplace. The results of the research allow to confirm the appropriateness of the theoretical approach to the description of the regularities of the noise and vibration process.

The established regularities in the formation of noise spectra, as well as the fact that the difference in the calculated and experimental sound pressure levels actually correspond to the measurement errors, allow to perform acoustic noise protection systems at the design stage of similar technological processes in accordance with the sanitary noise norms at the operator workplaces.

Authors:
  • Chukarin A.N.
    Chukarin A.N.
    Dr. Sci. (Eng.), Prof., Head of the Department Rostov State Transport University, Rostov-on-Don, Russia
  • Beskopylny A.N.
    Beskopylny A.N.
    Dr. Sci. (Eng.), Prof., Deputy Principal Don State Technical University, Rostov-on-Don, Russia
  • Isaev A.G.
    Isaev A.G.
    Cand. Sci. (Eng.), Senior Lecturer, isaev278@mail.ru Don State Technical University, Rostov-on-don, Russia