Model Validation of the Acoustic Systems "Tooth Wheels-Mandrels" of the Vertical Gear Generator and Gear Shaping Machines

Abstract

The research paper is devoted to one of the engineering characteristics of the machine tool equipment, which largely determines the safe working conditions for machine operators and competitiveness that is the sound pressure levels at workplaces. The problem of reducing noise levels to sanitary standards at the workplaces of the machine operators is relevant for mechanical engineering and has an important scientific, engineering and socio-economic significance and it corresponds to the priority and advanced scientific directions of the Strategy for scientific and technological development of the Russian Federation (part 20 g “the possibility of an effective response of the Russian society to grand challenge with the interaction of man and technology ... ”It should be noted that in this direction a number of theoretical and practical works have been carried out to reduce the noise of the universal turning, milling, and abrasive wheel grinder machines.

Monitoring of the technical condition of structures and building materials of an elevator silo housing

“…At the level of +7.900 there is a duplicate, horizontal crack encircling the perimeter of the building. In the area from +6.900 to +7.900, cracking and spalling of concrete, exposure of coarse aggregate and rebar are observed [9,10]. Cracks along the reinforcing bars with an opening of up to 3 mm.…”