Nick Gazis, CERN-BE/RF & NTU-Athens 1
ANSYS simulations for the Drive Beam
U-clamps*
11 April 2011
* continuation of EDMS doc 1133226:“MB U-clamps FEA”
Nick Gazis, CERN-BE/RF & NTU-Athens 2
Boundary Conditions Case Study
Cases Results
Summary & Future Steps
11 April 2011
Index
Nick Gazis, CERN-BE/RF & NTU-Athens 3
CLIC Two-Beam Module DB Girder Boundary Conditions
11 April 2011
Model Boundary Conditions
BDB CDB DDB EDBADB FDBQ1DB Q2DB
P1 P2 P3 P4
I
DB type 0 II
3D layout with colored clamp cases (explanatory slide
following) : i. Case 1 (blue): Slidingii. Case 2 (green): Fixation iii. Case 3 (red): Sliding
(Analysis simplified model)
Nick Gazis, CERN-BE/RF & NTU-Athens 411 April 2011
Input from D. Gudkov
Cases : I. Case 1* (blue) –Sliding–
1 DoF along the z-axis (longitudinal dilatation of PETS) 0 DoF along the y-axis 0 DoF along the x-axis
II. Case 2 (green) –Fixation– 0 DoF along the z-axis 0 DoF along the y-axis 0 DoF along the x-axis
III. Case 3* (red) –Sliding– 1 DoF along the z-axis (longitudinal dilatation of PETS) 0 DoF along the y-axis 0 DoF along the x-axis
CLIC Two-Beam Module DB Girder Boundary Conditions for the U-clamps
*[only layout difference between cases 1 & 3, same principle for the boundary conditions]
Case Study: i. U-clamp baseline material:
Aluminum Alloy;ii. Boundary Conditions:
a. Gravity;b. Vacuum: Pressure Load
(ΔP=1 bar);c. Thermal loading for the PETS
(20-40°C).
(Analysis simplified model)
Nick Gazis, CERN-BE/RF & NTU-Athens 511 April 2011
Case Study – Models & Cases
Case 1: Sliding U-clamp
Case 2: Fixation U-clamp
Case 3: Sliding U-clamp
Meshed Model
U-clamps models
Nick Gazis, CERN-BE/RF & NTU-Athens 611 April 2011
Results – Deformations
Drive Beam U-clamps
GravityGravity & Vacuum
Gravity, Vacuum & RF
GravityGravity & Vacuum
Gravity, Vacuum & RF
Case 1
X ≥ 2 μm 3.184 μm 25.754 μm ≥ 2 μm 8.435 μm 40.077 μm
Z ≥ 2 μm 4.152 μm 44.514 μm ≥ 2 μm 12.958 μm 57.047 μm
Y ≥ 2 μm 3.905 μm 35.433 μm ≥ 2 μm 9.811 μm 52.283 μm
Case 2
X ≥ 2 μm 3.211 μm 23.632 μm ≥ 2 μm 7.142 μm 28.601 μm
Z ≥ 2 μm 2.878 μm 11.866 μm ≥ 2 μm 3.410 μm 21.959 μm
Y ≥ 2 μm 3.008 μm 19.741 μm ≥ 2 μm 5.598 μm 27.254μm
Case 3
X ≥ 2 μm 4.235 μm 23.733 μm ≥ 2 μm 11.315 μm 34.339 μm
Z ≥ 2 μm 3.270 μm 9.9168 μm ≥ 2 μm 8.664 μm 11.835 μm
Y ≥ 2 μm 4.138 μm 11.484 μm ≥ 2 μm 8.735 μm 18.912 μm
Max Directional Deformations for Stainless Steel Max Directional Deformations for Aluminium
Case 1: Sliding U-clamp
Case 2: Fixation U-clamp
Case 3: Sliding U-clamp
Nick Gazis, CERN-BE/RF & NTU-Athens 711 April 2011
Results – Stresses
Drive Beam U-clamps
GravityGravity & Vacuum
Gravity, Vacuum & RF
GravityGravity & Vacuum
Gravity, Vacuum & RF
Case 1Equivalent Stresses (Von-
Mises)
113.1 kPa 208.3 kPa 92.0 MPa 197.1 kPa 390.2 kPa 42.66 MPa
Case 2 37.7 kPa 122.7 kPa 41.05 MPa 138.6 kPa 289.6 kPa 34.22 MPa
Case 3 75.3 kPa 169.4 kPa 82.11 MPa 171.2 kPa 343.1 kPa 21.33 MPa
Max Stresses for Stainless Steel Max Stresses for Aluminium
Case 1: Sliding U-clamp
Case 2: Fixation U-clamp
Case 3: Sliding U-clamp
Nick Gazis, CERN-BE/RF & NTU-Athens 8
Summary of Accomplished Tasks:•Study of boundary conditions for MB and DB;•MB & DB U-clamps modelization;•MB & DB U-clamps and MB & DB RF-components simplification;•MB & DB U-clamps simulation.
Future Tasks & Testing:•DB U-clamps optimization (if needed);•Simulation of the overall subassembly of the DB components (with the fixed DB-quads supports and the interconnecting bellows).
Summary & Future Steps
11 April 2011
Comments are always welcome!
MB U-clamps FEA:EDMS 1133226
Nick Gazis, CERN-BE/RF & NTU-Athens 9
Thank you!
9Nick Gazis, CERN-BE/RF & NTU-Athens11 April 2011