Justification of Ballast Tank Parameters of a Mоbile Berth for Timber Transshipment
Journal Title: Lesnoy Zhurnal (Russian Forestry Journal) - Year 2022, Vol 11, Issue 1
Abstract
The use of a mobile small-sized berth, the design of which was proposed by the authors in the previous paper, significantly increases capacity and reduces the cost of timber transshipment. When towing the berth over large distances, its ballast tanks are empty, which ensures that draft and water resistance to movement are minimized. At the point of operation the leveling ballast tank is filled with water until the top surface of the berth is leveled. In this position, the berth is moved locally in case of significant changes of the water level in the reservoir. Due to manufacturability and minimization of the volume of the leveling tank, it is designed as a part of the inner space at the berth stern, separated by a vertical wall. The permutation ballast tank is filled with water to submerge the berth until it leans on the leveled coastal slope. Water is pumped out of the tank to make the berth float during its local permutations. In this case, a significant trim should not be allowed. The lower point of the longitudinal section of the permutation tank was provided at the intersection of the berth bottom and the vertical, which bisects the waterline upon completion of the alignment. Algorithms have been developed for determining the position of the vertical wall of the leveling tank and the position and shape of the walls of the permutation tank. The distance of the vertical wall from the lower point of the berth and the coordinates of the points of the profiles of the left curved and right walls of the permutation tank were determined for a conditional berth of unit height and width. The coordinates were used to derive empirical dependencies. The values of the calculated metacentric heights verified the longitudinal and transverse stability of the berth in all positions. Experimental validation on a physical model of the berth confirmed the correctness of the results. Transition to the correct dimensions of the longitudinal profile from the conditional is assumed with the proportions retained. For citation: Posypanov S.V., Chuprakov V.O. Justification of Ballast Tank Parameters of a Mobile Berth for Timber Transshipment. Lesnoy Zhurnal [Russian Forestry Journal], 2022, no. 1, pp. 143–154. DOI: 10.37482/0536-1036-2022-1-143-154
Authors and Affiliations
Sergey V. Posypanov, Vyacheslav O. Chuprakov
Keywords
Related Articles
- EP ID EP700467
- DOI 10.37482/0536-1036-2022-1-143-154
- Views 91
- Downloads 0
Stem Volume Tables by Height Classes of Willow Trees in the Northern Taiga Region of the European Part of the Russian Federation
In order to improve the accuracy of forest inventory works, tables of stem volume by height classes of willow trees in the northern taiga region of the European part of the Russian Federation were created. Forest invento...
Restoration of Spruce Forests: Theory, National Practice and Problem Solving
Detailed analysis of standard and scientific literature on the problem of restoration of primary dark coniferous forests through the species succession is made for a long-term period. The forest formation theory develope...
Technological Resources of Harvesting and Logging Machinery of Bashkortostan Forestries
The forest sector of the Russian economy is a complex system of industries and activities, which include logging, woodworking, furniture and pulp and paper productions. The logging organization, which forms to a great ex...
Cutting of Round Timber with Heart Rot to Structural Lumber
Softwood lumber is widely used for the manufacture of load-bearing structures. However, the quality of round timber for lumber manufacturing has been deteriorating recently. The average diameter of round timber entering...
Technological Procedure for the Manufacture of Products Using Felling Residues
Increasing the profit received from 1 hectare of the developed forest area is one of the priority tasks of the forest industry today. This parameter describes the efficiency of forest management and affects the availabil...