Journal of Korean Society of Forest Science (한국산림과학회지)

Korean Society of Forest Science (한국산림과학회)
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Mathematical Models Predicting for Tree Skidding Forces and Its Evaluations

집재견인력 예측을 위한 수학적 모델의 개발과 평가

  • Oh, Jae-Heun (Forest Practice Research Center, Forest Research Institute) ;
  • Hwang, Jin Sung (College of Forest and Environmental Sciences, Kangwon National University) ;
  • Cha, Du Song (College of Forest and Environmental Sciences, Kangwon National University)
  • Received : 2007.07.02
  • Accepted : 2007.07.15
  • Published : 2007.09.30
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Abstract

Mathematical models for predicting the ground and semi-ground skidding force have been developed. The skidding force is expressed as a function of log geometry, total weight and coefficient of skidding. The coefficient of skidding was determined under field tests. The validity of the model developed was examined by comparing the predicted and measured skidding forces. Calculated ground skidding force, using the model developed can be predicted well with that measured experimentally. The semi-ground skidding force calculated from the model, however, does not predict well due to its confined conditions experimentally.

지면집재와 반지면집재의 집재견인력을 예측하기 위한 수학적인 모델을 개발하였다. 집재견인력은 견인목의 형태, 총무게, 집재계수의 함수로 나타내었으며, 집재계수는 현장실험을 통해 결정하였다. 집재견인력 예측을 위해 개발된 수학적 모델의 검증은 예측값과 실측한 집재견인력의 비교를 통해 실시하였다. 그 결과 지면집재의 경우는 예측모델의 적합성이 인정되었으나 반지면집재의 경우는 제한된 실험조건으로 인해 적합도가 약간 떨어지는 것으로 분석되었다.

Keywords

Acknowledgement

Supported by : 농림기술관리센터

References

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