5003 Lectures - Faculty of Engineering and Applied Science

E5003 - Ship Structures I 143
© C.G. Daley
Example of MDM with Sway
To illustrate the moment distribution method with
sway, we will use a problem similar to Example 3
in Topic 13. In this case the problem has a roller
on the left, instead of a pin. As a result the frame
can sway.
To solve the problem we need to split the problem
into two component problems. The first problem
has sway prevented (by a pin on the left support).
The complementary problem has an imposed sway
which will create a reaction of opposite magnitude
to the first problem.
The first problem was solved in Example 3
above. The reaction at the left hand pin was (see
pg. 130);