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