LHCb Outer Tracker
Finite Element Model of the Support Bridge
The global description of the OT Station design can be found in the
To optimize the design of the
Support Bridge ,
various Finite Element Models (FEM) were employed,
two versions of which are shown below .
FEM of Support Bridge: "light" version (left); "reinforced" version (right).
In each FEM, a set of loads is applied as shown in the
table below ,
in order to study the displacements of the Support Bridge:
OT/IT in the nominal position
(Load Set 1)
OT slid out
(Load Set 2)
Worst-case scenario with full load in the center, e.g. during detector
(Load Set 3)
Only "long" OT half slid out
(Load Set 4)
Load sets: OT in position (top left); OT slid out (top right);
full load in the center (bottom left); half OT slid out (bottom right).
The vertical displacements calculated in the
FEMs shown above as a result of applying these
load sets are shown in the
pictures below. The results show that large improvements
in the vertical stability can be obtained by reinforcing the upper structure
as in the
Horizontal displacements have also been calculated, e.g. results for
Load Set 4
are shown in the picture below.
Vertical displacements under four load sets in two FEMs.
Horizontal displacements under Load Set 4.