長倉口船の倉口開閉に対する部材の剛性の影響について

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In recent years, steel hatch covers have been used in many cargo ships in order to obtain the highest loading efficiency. But it is a serious problem to select the normally operating hatch covers for ships with long hatchways, because in these ships the horizontal deflections, that is, opening and closing of long hatchways are sometimes over the allowable limits. The allowable limits are different on the kinds of hatch covers. In the other hand, the horizontal deflections of long hatchways are differently affected by such many items as length, breadth of hatchway, flexural rigidities of structural members in holds, loading conditions and others, and these deflections are compound with them of the longitudinal and transverse strength mechanisms. In this investigation, the horizontal deflections of long hatchways of standard ships different dimmensions and rigidities according to ship length have been computed and shown in curves. The standard ships have been settled from the mean data obtained from many practical ships of 40m〜90m length. Moreover, the many curves correcting deviations from the standard horizontal deflections of standard ships due to the increase and the decrease of many items affecting to deflections have been provided. These curves will be used to estimate the maximum range of opening and closing of long hatchway and effective reinforcement to settle the maximum range in the allowable limit in the stage of initial design.
社団法人日本船舶海洋工学会の論文
1967-02-28

長倉口船の倉口開閉に対する部材の剛性の影響について

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