George, Using
Tables in transient analysis, animation
Had previously documented
his use of tables within ANSYS to import realistic simulations
of energy deposit from FLUKA via Excel. Now he summarised key
characteristics in his work (bunch timing and material
properties), and demonstrated the transient study of material
stress when the FLUKA energy pattern was used in the
0.6X0 tapered spoiler. He considered
stresses up to total time of 4 microseconds, in steps of
54ns, summarised by a short animation.
This is excellent progress from the group as a whole now,
having now gone through all the steps from initial geometry
definition and modelling in two different physics simulations,
comparison of Ti and Ti-alloy, steady state analysis starting
from very simple
heating patterns, to a transient study using realistic
physics simulations of energy deposition.
The peak stress was observed after 6 time steps (~300ns) on the exit
face of the spoiler, reducing to half of this at ~700ns,
i.e. the time at which a subsequent ILC bunch would arrive at
baseline 337ns spacing. Now the techniques have been
established, it should not be too difficult to investigate the
vartiation with different spoiler geometries, or different
beam impact locations, and to decide what aspects of the
spoiler damage are unreliable enough to justify an
experimental test.
Actions (but noted that George will be busy elsewhere
for next few months)