ssc-367 - Ship Structure Committee

HOT-SPOT STRESS
.
The hot-spot stress is the peak stress in the
immediate vicinity of a structural
discontinuity,such as the stiffener edge or a
cutout. On a tubular joint, the hot-spot
stress usually occurs at the weld toe of the
incoming tubular (brace) or the main tubular
(chord).
FATIGUE LIFE
.
●
The number of stress cycles that occur before
failure, typically corresponding to either
first discernible surface cracking (Nl) or the
first occurrence of through thickness
cracking.
FATIGUE STRENGTH
●
✎
The stress range corresponding
to
a number of
cycles at which failure occurs.
FPSO
.
Floating production, storage
and offloading
tanker.
IRREGULARITYFACTOR
●
✎
The ratio of mean crossings with positive
slopes to the number of peaks or valleys in the
stress history.
KEULEGAN-CARPENTERNUMBER, Kc :
A parameter used to define the flow properties
around a cylinder. Equal to the product of the
amplitude of velocity and oscillation period,
divided by the cylinder diameter.
MEAN ZERO-CROSSING PERIOD :
The mean zero-crossing period is the average
time between successive wave crossings with a
positive slope (up-crossing) of the zero axis
in a time history.
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