Avaliação dos níveis de vibração no operador de um trator agrícola ensaiado em pista normatizada em diferentes velocidades de deslocamento

• Ano de defesa: 2015
• Autor(a) principal: Moraes, Guilherme Aparecido Gomes de [UNESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Mecanização agrícola; Tratores agricolas - Vibração; Saúde do trabalhador; Insalubridade; Mechanization
• Link de acesso: http://hdl.handle.net/11449/139417; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/18-05-2016/000865121.pdf

The brazilian agriculture mechanization has grown increasingly in recent decades. As a result of mechanization, great care for safety of agricultural machine operators must be present, as these vehicles expose workers to various risks, such as physical risks related specifically to the vibration of the equipment. This study aimed to evaluate the vibration levels in an agricultural tractor tested on standard roadway at different speeds accomplished in Agricultural Sciences Faculty of UNESP in Botucatu. Was used a farm tractor with 92 kW of power, and the parameters evaluated in this research were vibration dose value, equivalent power level measurement (RMS) maximum, medium and minimum acceleration resulting in 3 axes (x, y, and z), maximum peak level during the measurement, crest factor normalized acceleration and total for workday of eight hours. The data acquisition was performed with vibration recorder HVM100. The proposed data were evaluated in four forward speeds (V1=2.5 km/h, V2=3.0 km/h, V3=3.6 km/h and V4=4.4 km/h). The data were statistically analyzed using ANOVA overall comparison to one criterion and when the analysis showed statistical significance was performed an individual analysis compared by Tukey test ( p<0.05). It was observed that vibration dose values increased with increase of the speed. The x-axis was the one that presented highest vibration dose values. Values of maximum and minimum acceleration, acceleration equivalent weighted and the weighted average acceleration had their highest values at V=4.4 km/h