Safe transportation of cargo taking into account tossing of ship

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Safe transportation of cargo taking into account tossing of ship

Journal Title: Автоматизация судовых технических средств - Year 2018, Vol 1, Issue 24

Abstract

It is shown that the process of tossing of ship is formalized by side, careening and vertical constituents, which differ by amplitudes and initial phases, but an identical period is had. In the process of tossing from the change of heel, list and vertical moving there are the proper angular accelerations. The ship and supporting systems of coordinates are considered, thus the ship system of coordinates is oriented in relation to supporting taking into account the current values of heel, list and vertical moving. Communication is shown between the ship and supporting systems of coordinates, which is expressed by the square matrix of sending cosines. Depending on position of centers of the masses cargo and ship at the known parameters of his tossing the got nascent linear accelerations and, taking into account mass of cargo, forces of inertia. Considered dependence of forces of inertia, operating on a cargo, from the side, careening and vertical constituents of tossing of ship. At first analytical expressions are got for the calculation of accelerations and forces of inertia in relation to the supporting system of coordinates, and then by the matrix of sending cosines certain analytical expressions for the calculation of component forces of inertia, which influence on a load at tossing, in the ship system of coordinates. For the calculation of linear accelerations depending on angular accelerations of change of heel and list of ship the got analytical expressions of determination of radiuses of curvature of side and careening tossing, which are characterized by the difference of coordinates of centers of the masses of cargo and ship. At certain component forces of inertia, arising up from tossing of ship, in the supporting system of coordinates, as shown in work, attractive of cargo power, which coincides to direction with the vertical constituent of forces of inertia is taken into account. The analytical expressions of calculation of component forces of inertia got in the article in the ship system of coordinates enable to estimate the general horizontal constituent of forces of inertia which is investigation of pitching of ship a side and, and to define a chart and durability of fixing of cargo on a ship, guarantying safety of his transportation in the possible stormy terms of planned to the voyage.

Authors and Affiliations

Yevgeny Vlasenko

Keywords

making tossing of ship. matrix of sending cosines. linear accelerations of tossing. projection of forces of inertia of tossing

EP ID EP408856
DOI -
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