Appendix D: A Detailed Look at _ 229
| ¥
Run mode.
7 v
7.0000
Initial estimates.
14
14
´ _ 2
10.0000
Possible root.
) )
1,000.0000
Stress not zero.
The large stress value at the root points out that the _
routine has
found a discontinuity. This is a place on the beam where the stress quickly
changes from negative to positive. Start at the other end of the beam
(estimates of 0 and 7) and use _ again.
0 v
0.0000
Initial estimates.
7 7
´ _ 2
3.1358
Possible root.
) )
2.0000 -07
Negligible stress.
Beame’s beam has zero shear stress at
approximately 3.1358 meters and an
abrupt change of stress at 10.0000
meters.
When no root is found and
Error 8
is displayed, you can press −
or any
one key to clear the display and observe the estimate at which the
function was closest to zero. By also reviewing the numbers in the Y- and
Z-registers, you can often determine the nature of the function near the
root estimate and use this information constructively.
Graph of Q versus x.
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