Civil Engineering Reference
In-Depth Information
where the summation is taken from
i
equal to 1 to
N
.
As we let the number of sections tend to infinity,
δy
i
tends to zero, and the right-hand
side becomes an integral:
(4.26)
Figure 4.26
Sectional force fluctuations on a
long cylinder.
The instantaneous fluctuating force on the body as a whole is:
Squaring both sides,
Now taking means (time averages) of both sides,
(4.27)
