Predications buoyancy. The first step of the solving

PredicationsOf The Sectional EffectsThe supposing of the weightdistrubition as w(x) and the bouyancy distrubition as b(x).For the structuralequilibrium, these two components of ship’s moments, have to be balance on afixed or stabilized point.That means:The first equationshows that, the weight and buoyancy is equal to each other.The second formulademostrates that, the weight’s and buoyancy’s moments taken by the Xo point.Ifthese sitations are not providing, the structure is not in equilibrium andwhile to become in equilibrium state, the trim and the position of the draft isgoing to be in change.

In there, the supposing of the w(x) and b(x) is in fixedposition for making the analysis.But that hypothesis can not give guarantee forthe local stability between the weight and buoyancy.This situation, generatesthe balanced load dispersion on the all of ship lenght and this effectuates theshear forces and bending moments on the structural plate.When the examinationof the situation that arises in the terms of strength, the model of the ship asbeam that under the effects of the weight and buoyancy.Thefirst step of the solving this problem is making the calculations for findingthe unbalanced force q(x) that along of the ship lenght. This is the differencebetween buoyancy and weight.

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Theinvestigation of the Q(x) shear force and M(x) bending moments on any part of sectionalplate that constituted by the not counterpoised force could done with theagreement of the balance between reactions on the crossing and the loads on theedge.Thisacceptance, specifies that the integral of the unstable force affects on the sectionand the shear force at any point of the structure is going to beequal.Secondly,the moments of the forces acting on a fixed point on profilemust be in equality. The bending moment will taken from the partial integrationof the integral.Thementioned section’s calculations for gathering the datas about the shear forceand the bending moment equilibrium must be done for each 3 situationalprocess.According to the datas, the characteristics of  the structure shows the differences for eachanalysis.After the determination of the sectional effects consequences thelongitudinal strength of the ship will be computing.The measurements of thelongitudinal strength provides the shear stress calculations and comparisonsfor the limiting criterias.

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