Continued...
Bennett Associates was responsible for carrying out a full stress
analysis of the cutterhead support, TBM structure and gripper body and pads
which was done by Finite Element analysis using ANSYS software solid modelling
elements.
The analysis was used interactively by the Robbins designers in
Seattle USA. Close co-operation was maintained by visits to Seattle and exchange
of AutoCad drawings on disk to ensure that the complex interface between TBM and
its back-up system was correctly engineered.
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