5003 Lectures - Faculty of Engineering and Applied Science

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E5003 - Ship Structures I 158 © C.G. Daley The forces are not the same as found above. They are only the forces that act on the individual member. The beam forces are found as follows: Note that there is no axial force (would be F4, F7) in Beam 2. This is because the roller at bottom of beam 3 releases all horizontal force. The applied load of 10 must all be transmitted to ground through Beam1. With these forces and moments we can find the shear force and bending moment diagrams, along with the axial, shear and bending stresses:
E5003 - Ship Structures I 159 © C.G. Daley Because there was no load along the member, the maximum stresses in the above case occurred at the ends of the beam. Q2: How are loads along a beam dealt with? A2: Loads that are act between dofs are dealt with in three steps. In step 1, the fixed end forces and stresses that the loads cause are found. In step 2, the fixed end actions are placed on a full structural model and solved. All responses, including deflection, stresses, strains, for the full structure (including the beam where the loads acted) can be found for the whole structure. The complete solution comes from adding the two solutions (step1 + step2):
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5003 Lectures - Faculty of Engineering and Applied Science

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