木材の摩擦抵抗に関する研究
スポンサーリンク
概要
- 論文の詳細を見る
It is evident that a certain resisting force is acting against a tractive force when a sledge (or any other simmiller log-transporting equipment) is pulled by that force. The total resistance is mainly due to the friction on the contacting surface between the sledge and the ground on which it lays, but somewhat complicated figures may be seen in the amount of the resistance owing to the additional resisting forces on the front surface and the side surfaces of the sledge. Though there had been already performed numerous studies theoretically as well as experimentally on the phenomena of friction and resistance, the given values of the resistance or the coefficients of friction differ to a large amount in each case; the nature of friction itself is not yet sufficiently clarified because it depends upon various complicated factors. The author performed some experiments with smallsize model-sledges aiming to analyse the problem. In the experiments coefficients of statical friction on the bottom surface and the resisting forces both on the front and the side surfaces of the model-sledges were measured. As to the measurement of friction and resisting forces, two methods, namely, 1) maximum slope of the ground surface at the moment when a sledge slides being measured directly, and 2) tractive force to move a sledge on horizontal surface being measured, and then coefficient calculated mathematically, were compared at first; better results were proved by the latter method. The results obtained by the latter method are as follows:
- 東京大学大学院農学生命科学研究科附属演習林,The Tokyo University Forestsの論文
東京大学大学院農学生命科学研究科附属演習林,The Tokyo University Forests | 論文
- ニューギニア産マトアの材について
- 北海道演習林におけるトドマツ生立木材質腐朽について
- 古軌条を利用した軌道橋並びに自動車道橋の標準設計
- 秩父演習林における間伐試験地直径生長資料
- 北海道演習林における林木育種研究40年史 : 100周年記念資料10