OTIMIZAÇÃO DO USO DO TRATOR FLORESTAL Forwarder EM FUNÇÃO DA PRODUTIVIDADE, CUSTOS E CAPACIDADE DE CARGA1

Carmo, Flávio Cipriano de Assis do; Fiedler, Nilton César; Minette, Luciano José; Souza, Amaury Paulo de

doi:10.1590/0100-67622015000300017

Cited by 12 publications

(15 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the time-motion study, the average load weight was 9,000 kg (± 5,300 kg), and the lowest values were found in the travels with only firewood, as the capacity of the load compartment was 15,000 kg. For Carmo et al (2015), it is possible to maximize the forwarder productivity and consequently reduce production costs by increasing the height of the stoves. Thus, a largest load box would be obtained, since the wood density and the volume transported do not compromise the machine stability.…”

Section: Discussionmentioning

confidence: 99%

“…Some variables that stand out are: dimensions of the logs, the greater dimension the more optimized use of the load compartment (OLIVEIRA et al, 2009); load volume, which can be expanded as long as it respects the weight limit recommended by the manufacturer, so that its use can be optimized (CARMO et al, 2015); and extraction distance, which provides a decrease in productivity and an increase in costs as the distance increases (LEITE et al, 2014). These variables can be used in the mathematical modeling of productivity and costs, aiming to understand how the operational conditions and characteristics of the stands influence in forest extraction.Therefore, it would be possible to estimate the yields of the machine and get lower costs, regularize the production and obtain better work.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modeling of Forwarder Productivity and Costs in Thinned Pine Stands

Rodrigues

Lopes

Filho

et al. 2018

View full text Add to dashboard Cite

The aim of this study was to assess the influence of some operational variables on the forwarder productivity and production cost in thinned Pinus taeda L. stands by means of mathematical modeling. This study was carried out in a forest company located at Quedas do Iguaçu, state of Paraná, Brazil. Two stands at 9 and 10 years old from sites with high productivity and similar soil and relief features were studied. A time-motion study was applied to determine the operational cycle time, operational efficiency, productivity, and production costs. By means of mathematical modeling, we verified the influence of the variables: age of stand; cycle time; load volume; and extraction distance on the forwarder productivity and production costs. Models were fitted for estimating the forwarder productivity using cycle time, load volume, and extraction distance. Thus, we obtained the determination adjusted coefficients of 0.88 and 0.94, with an estimate standard error between 6.9% and 13.5%. Models for estimating production cost through the load volume variable presented a determination coefficient of 0.64 and 0.86, with an estimate standard error of 23.1% and 26.7%. Such results have shown the possibility of using mathematical models to estimate the performance of forest machines as a tool for planning the timber harvesting operations. Keywords: Timber extraction, operational variables, harvesting planning. ResumoModelagem da produtividade e custos do forwarder no desbaste em povoamentos pinus. Objetivou-se neste estudo avaliar algumas variáveis de influência na produtividade e custos de um forwarder em povoamentos de Pinus taeda L. submetidos ao desbaste por meio de modelagem matemática. O estudo foi realizado em uma empresa florestal localizada no município de Quedas do Iguaçu, estado do Paraná. Foram estudados dois povoamentos com idades de 9 e 10 anos, localizados em sítios de alta produtividade e semelhantes entre si em relação ao tipo de solo e relevo. Foi realizado um estudo de tempos e movimentos, determinando os tempos dos ciclos operacionais, a eficiência operacional, a produtividade e os custos de produção. Foram verificadas a influência das variáveis: idade do povoamento; tempo do ciclo; volume de carga; e distância de extração na produtividade e custos de produção do forwarder por meio de modelagem matemática. Em povoamentos com 9 e 10 anos, os modelos ajustados para a estimativa do forwarder por meio das variáveis tempo do ciclo, volume de carga e distância de extração apresentaram coeficientes de determinação ajustados de 0,88 e 0,94, com um erro padrão de estimativa de 6,9% e 13,5%. Os modelos para a estimativa dos custos de produção por meio da variável volume de carga apresentaram um coeficiente de determinação de 0,64 e 0,86, com erro padrão de estimativa de 23,1% e 26,7%. Tais resultados mostraram a possibilidade do uso de modelos matemáticos para a estimativa do rendimento da máquina, podendo ser utilizados como ferramenta no planejamento das operações de colheita da madeira. Palavras-chave: Extr...

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modeling of Forwarder Productivity and Costs in Thinned Pine Stands

Rodrigues

Lopes

Filho

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The equipment used for harvesting wood can be Harvester, Forwarder and Feller-buncher, among others. These equipments are, in general, imported from European countries, having their design characteristics different from the Brazilian reality [4].…”

Section: Introductionmentioning

confidence: 99%

Occupational Noise and Vibration Assessments in Forest Harvesting Equipment in North-eastern Brazil

Lima

Souza

et al. 2019

JEAI

Self Cite

View full text Add to dashboard Cite

Occupational hazards arising from physical agents present in wood harvesting equipment may cause irreversible damage to the health of exposed operators. Thus, the objective of this study was to quantify the noise and vibration levels emitted by three types of wood harvesting equipment (Feller-buncher, Harvester and Forwarder) in a forestry company in north-eastern Brazil during a workday. Noise measurements were performed with an equivalent noise level meter (audiodosimeter) at the workstation and compared with the limits set in NR-15. To evaluate the vibration was used a full cup gauge, which has a sensor called triaxial accelerometer (directions X, Y and Z), installed on the operator's seat. As a result, the average noise dose of all activities in the operation studied did not exceed the maximum allowable limit of 85 dB (A) for 8 hours of continuous Lima et al.; JEAI, 40(5): 1-9, 2019; Article no.JEAI.51345 2 work. The whole body vibration in all equipment was below the exposure level, however, some equipment obtained indexes slightly higher than the alert level, a fact that shows a higher accuracy in the equipment. Original Research Article

show abstract

“…According to Machado & Lopes (2000) and Silva et al (2014), the harvest and transport activity has a great economic importance to the forest sector, and it should be designed to reduce that costs, that can represent more than 50% of the total cost of the wood present in the industry. On that way, is very important to verify the best operational system, outsourced or own, that would result in a lower cost by produced volume, considering the financial resources available to those activities (Carmo et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Production Capacity From a Harvester in the Forest in Own and Outsourced MODULES.1

et al. 2017

Self Cite

View full text Add to dashboard Cite

This study aimed to perform a machine operational analyses used on the eucalyptus mechanized harvest, in four different regions of the Espirito Santo and Bahia states. The activities were performed by own and outsourced labor, the regions had a similar climate condition, relieve and similar machine, the harvest forest tractor. The mechanical disponibility, operational efficiency, machine production was analyzed during a 12 months period in the field and by the operational output from the database from 60 own machines and 60 outsourced machines in each one from de four regions (120 machines). Based on the results, it was observed that in the own module and the outsourced, variables were the mechanical disponibility operational efficiency and technical disponibility did not have different during the study period, among the regions. The executed work with own machines had a higher production when compared to the outsourced, with exception of the regions A and C. The total volume produced per year by the cut forest with the own machines were higher than 1.234.310 m3 to the total volume cut with outsourced machines, showing a higher operational efficiency when the harvest was made with an own model.

show abstract

OTIMIZAÇÃO DO USO DO TRATOR FLORESTAL Forwarder EM FUNÇÃO DA PRODUTIVIDADE, CUSTOS E CAPACIDADE DE CARGA1

Cited by 12 publications

References 3 publications

Modeling of Forwarder Productivity and Costs in Thinned Pine Stands

Modeling of Forwarder Productivity and Costs in Thinned Pine Stands

Occupational Noise and Vibration Assessments in Forest Harvesting Equipment in North-eastern Brazil

Analysis of the Production Capacity From a Harvester in the Forest in Own and Outsourced MODULES.1

Contact Info

Product

Resources

About