鉱石圧力の実船計測について

概要

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Measurements on iron ore pressures were carried out using an ore carrier ship of 56,100 D.W.T. Statical pressures at loading and unloading and dynamical pressure variations at sea were measured under following conditions: ore-crude iron ore of Marcona Co. San Juan, Peru, state-mixture of dry sand and dry clay, location of measuring points-longitudinal bulkhead of ore hold. Results are summarized as follows. 1) Pressure distribution on a bulkhead differs from that expected by Coulomb's theory and it becomes very small near the bottom. 2) It seems that ore pressure varies at sea by ship motions or vibrations. For, the load of bulkhead stiffener at unloading is larger than at loading, but the load of bulkhead plate becomes rather small after a voyage. 3) Characteristic of ore pressure variation at sea is complicated but the probability distribution of record of each measuring point is approximately represented by Rayleigh's distribution.
社団法人日本船舶海洋工学会の論文
1967-07-30