The rational approach to the working design of ground-based harvesting systems.

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  • 高性能車両系伐出システムにおける適正作業域と機械の組合わせの検討
  • コウセイノウ シャリョウケイバツシュツシステム ニ オケル テキセイ サギョウイキ ト キカイ ノ クミアワセ ノ ケントウ

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Abstract

For an improved mechanized methods of logging, the method for estimating the optimal working area, on which a certain kind of logging operation could be carried out most economically is discussed through the use of an interactive computer-aided simulation. A procedure is presented to solve for the most efficient operating flow system given alternative modes of ground-based harvesting, these were combined feller-buncher, skidder and processor. The technical features to solve this problems can be exclusively approached on a productivity basis by comparing operational queuing delay time in relation to trade-offs of the equipment's installation, values of varying skidding distance and out-put, and harvesting restrictions. The results showed that the skidding distance varied as the density of transshipment yard points in number/ ha and the type of skidding road nets, and also the most suitable working system would be considerably influenced by the opimal skidding distance. Then, the optimal skidding distance was estimated to be about 400〜500m. Elements characterizing working process were also investigated, which were the operating availabilty k_s, where k_s meant a ratio of productive hour per scheduled operating hour, and the operating duplicating ratio C_s defined from the rate of operating overlap time for processing some works simultaneously in the fixed scheduled period. Then, in the method using these elements, we could lead to the development of production equations for all phases of logging.

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