Simulation technique for modelling the production chain in forestry

Ziesak, Martin; Bruchner, Anne-Katrin; Hemm, Martin

doi:10.1007/s10342-004-0028-4

Cited by 8 publications

(7 citation statements)

References 3 publications

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“…Thus, a simulation system integrating tree growth and branchiness is an important tool to model the production chain from forestry to wood industry (e.g. Ziesak et al, 2004).…”

Section: Application Of the Modelsmentioning

confidence: 99%

Branch characteristics of widely spaced Douglas-fir in south-western Germany: Comparisons of modelling approaches and geographic regions

Hein¹,

Weiskittel

Kohnle³

2008

Forest Ecology and Management

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“…Thus, a simulation system integrating tree growth and branchiness is an important tool to model the production chain from forestry to wood industry (e.g. Ziesak et al, 2004).…”

Section: Application Of the Modelsmentioning

confidence: 99%

Branch characteristics of widely spaced Douglas-fir in south-western Germany: Comparisons of modelling approaches and geographic regions

Hein¹,

Weiskittel

Kohnle³

2008

Forest Ecology and Management

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“…Simulation techniques have been widely used in industrial and manufacturing engineering as an effective tool to understand production systems and estimate system productivity and costs [21]. When properly developed and applied, simulation techniques can be useful to overcome the aforementioned limitations of the conventional TS approach in forest operations.…”

Section: Introductionmentioning

confidence: 99%

Discrete-Event Simulation of Ground-Based Timber Harvesting Operations

She

Chung

Kim

2018

Forests

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Operational studies are necessary to support production and management decisions of forest industries. A time study (TS) approach is widely used in timber harvesting operations to understand the performance of individual harvesting machines as well as the entire system. However, several limitations of the TS approach include the use of generalized utilization rates, incapability of capturing interactions among equipment, and model extrapolation in sensitivity analysis. In this study, we demonstrated the use of discrete event simulation (DES) techniques in modeling a ground-based timber harvesting system, and compared the DES results with those of the TS model developed with the same observed data. Although both TS and DES models provided similar estimation results for individual machine cycle times and productivities, the estimated machine utilization rates were somewhat different due to the difference in synthesizing machine processes in each approach. Our sensitivity analysis and model expansion to simulate a hypothetical harvesting system suggest that the DES approach may become an appropriate method for analyzing complex systems especially where interactions among different machine processes are unknown.

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“…Computer modeling in the sphere of timber harvesting has been used since the 1960s (Newnham 1968). Such studies are mostly focused on forecasting the efficiency of logging machines, expenses for timber harvesting as well as the assessment of the impact of various factors of change of efficiency and expenses for timber harvesting (McDonald et al 2001, Ziesak at al. 2004, Ackerman at al.…”

Section: Introductionmentioning

confidence: 99%

Simulation Modeling of Truck Load of Skidding Tractors with a Grapple for Chokerless Skidding

Shegelman

Будник

Baklagin

2019

Croat. j. for. eng. (Online)

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The objective of the present study is to define mass distribution laws for a bundle of trees using the methods of statistical simulation modeling in order to calculate chokerless skidding tractors lift capacity. For that purpose a statistical simulation model has been developed to generate forest taxation data necessary for complete filling of skidding tractor grapple. The following samples have been obtained from the regions of the European North of Russia based on the model: masses of bundles of trees that can be placed in grapple and values of vertical component of normal load applied to skidding tractor grapple. Minimum values for masses of bundles may vary in the range of 40-87% from the average value. Maximum values may vary in the range of 8-55% from the average value. The difference between the maximum and minimum masses of bundle values increased with increasing the capacity grapple and decreased with increasing the distance from the butt to grapple. We have determined the dependence of bundle mass variation and values of vertical component of normal load applied to skidding tractor grapple on capacity grapple for the regions of the European North of Russia. The studies have allowed determining recommended values for chokerless skidding tractors lift capacity. The analysis of specifications of various models of skidding tractors has shown that clambunk skidders have deficient marginal lift capacity.

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Simulation technique for modelling the production chain in forestry

Cited by 8 publications

References 3 publications

Branch characteristics of widely spaced Douglas-fir in south-western Germany: Comparisons of modelling approaches and geographic regions

Branch characteristics of widely spaced Douglas-fir in south-western Germany: Comparisons of modelling approaches and geographic regions

Discrete-Event Simulation of Ground-Based Timber Harvesting Operations

Simulation Modeling of Truck Load of Skidding Tractors with a Grapple for Chokerless Skidding

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