鉱石船における鉱石押込み圧の理論研究
1973 年 1973 巻 134 号 p. 223-231
詳細
1973 年 1973 巻 134 号 p. 223-231
Coulomb's theory of soil mechanics fails to give an estimate of ore pressure on longitudinal bulkheads in an ore carrier subjected to wave loads, because ore in a hold behaves as an elastic-plastic continuum in this situation, as the authors have suggested [1].
In this paper, elastic-plastic analysis is carried out on the basis of the elastic constitutive equation proposed by the authors [1] and the yield condition of Drucker and Prager [2]. In the case of ore carriers, behaviors of ore depend largely upon the rigidity of structures and external loads. Therefore, both ore and structures should be analyzed as a continuum, and it can be done with the aid of the finite element method.
A series of experiments of an ore carrier were performed by Ando [3] at the Ship Research Institute with models of scale 1/6.57, and the results are compared with the present theory ; it shows good agreement between them. Therefore, side structures in contact with ore can be calculated according to the present theory satisfactorily.
