Investigation into Effects of the Utility Machine Performance Characteristics on the Vibration at the Operator’s Workplace

This article is devoted to an urgent problem of reducing vibration at the operator’s workplace by improving vibroprotection system based on performance characteristics of road-building machines. Previous experimental studies have shown that dynamic impact at the operator’s workplace is generated by contacting machine parts and the surface under the treatment, as well as by contacting chassis elements and uneven microrelief. The paper presents investigation results which reveal the impact of these factors on the vibration at the operator’s workplace. A mathematical model of the subsystem "Microrelief" was developed which enables to determine the degree of the impact of these factors on the vibration at the operator’s workplace. The results are given in the form of diagrams showing relations between coefficients of rigidity of cab suspension system elements and those of operator’s seat, pavement type, microrelief roughness and machine movement speed in operation and in driving modes. Taking into account performance characteristics when designing road-building machines results in more effective vibroprotection systems to be developed which can adapt the operation conditions.