5003 Lectures - Faculty of Engineering and Applied Science

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E5003 - Ship Structures I 140 © C.G. Daley 13.8. For the case shown below, set up and fill in the first two cycles of the Moment Distribution calculations. 13.9. A 2 bar structure is shown below. a) Solve for the moments using the moment distribution method. b) Find the vertical reaction at the pin A (the left).
E5003 - Ship Structures I 141 © C.G. Daley Topic 14: The Moment Distribution Method with Sway a Quadrant Introduction In this chapter we will extend the application of the moment distribution method for solving frames with sway ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In the previous chapter we dealt with beams and frames in which joints could not translate due to bending. In this chapter we all add the possibility of sway motion. For simplicity we will only consider one sway motion. The solution of a sway problem takes two parts. In the first part a unit sway sway is imposed on the structure (call this the * problem). The imposed motion causes initial fixed end moments, which relax as the solution progresses, just as happens with applied forces. The force required to impose the unit sway can be found once the solution is found, just like the other reactions. In the example at left this is F*2x . In the second problem (the 'f' problem) the sway is prevented, and the problem solved.
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5003 Lectures - Faculty of Engineering and Applied Science

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