Page 271 - statbility for masters and mates
P. 271
Second moments of areas 259
Fig. 29.4
Fig. 29.5
lb3
The second moment of a rectangle about one end is given by 3 , and
therefore the second moment of the elementary strip about the centre line is
given by y3 dx and the second moment of the half waterplane about the 3
centre line is given by
L y3
O 3 dx
Therefore, if ICL is the second moment of the whole waterplane area about
the centre line, then:
2 L 3 ICL 3 ydx
O
