XFEL Main Girder STUDY

shrubflattenUrban and Civil

Nov 25, 2013 (3 years and 11 months ago)

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Team: Wolfgang Burkert, Haimo Jöhri, Johan Wickström, Uwe Barth

XFEL Main Girder STUDY

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OUTLINE

Objective


Design


layout


Eigenfrequency and stress analysis


Summary





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objective



to develop a main Girder for PSI
-
XFEL to be tested in



the 250 MeV injector


provide stable platform for beam components


easily aligned >> 3 feet version preferred


study use of Mineral Cast materials


aiming for length of about 5m to reduce installation and
commissioning work


first approach dose not include active damping



prototype scheduled for February 2009


measure eigenfrequency and damping effects of girder


produce ~10 units for the 250 MeV injector by summer 2009



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design

Dimensions & Constrains


main dimension currently L4700 x H600 x W550


beam distance from girder interface 400mm


3 feet or 4 feet solution possible


rigid feet's is an import issue


interface for components defined

difference from 250 MeV injector vs. XFEL machine


feet layout constrained by the 250 MeV injector floor infrastructure
channels


installation can be done by the hall crane, XFEL machine probably wheel
based installation


number of girders ~10 vs. ~80


machine length 80m vs. 1km


alignment

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design

Why mineral Cast

?



high damping properties expected, non homogenous material


high eigenfrequency as one solid block


cost effective in mass production (no high temperature)


one wooden mould gives ~10 girders


one steel mould gives +100 girders


surfaces can be grinded to precision of 0.1mm over the length


supplier company EPUCERT Germany


no local stresses introduces by machining


WEAK Points


fragile edges
-

corners


minimal wall thickens +80mm


mould costs during prototyping


unknown factors?





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XFEL Main Girder STUDY

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LAYOUT
250 MeV injector Machine


XFEL Main Girder STUDY

GIRDER 1 set

GIRDER 2 set

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LAYOUT
250 MeV injector Machine



XFEL Main Girder STUDY

Floor Channel

Feet

Feet

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Eigenfrequency analysis


estimate eigenfrequency and deformations of girder


3 feet or 4 feet solution considered


several feet locations considered


target eigenfrequency above 40 Hz


sacking deformation of low relevance since machining done on support points


sacking from 10
-
20
μ
m


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Eigenfrequency 4 Feet downstream

XFEL Main Girder STUDY

Modus

Frequenz [Hz]

1

118.22

2

119.62

3

156.39

4

163.03

5

204.05

6

209.67

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Eigenfrequency Modes ex. 4 Feet downstream

XFEL Main Girder STUDY

Mode 1
-

118 Hz

Mode 2
-

119 Hz

Mode 3
-

156 Hz


Mode 4
-

163 Hz


Mode 5


204 Hz


Mode 6
-

209 Hz


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Eigenfrequency
analysis 3 Feet
Version

XFEL Main Girder STUDY

Modus

Frequenz [Hz]

1

84.168

2

129.86

3

143.82

4

148.92

5

167.31

6

223.67


Eigenfrequency 3 Feet downstream

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XFEL Main Girder STUDY

Modus

Frequenz [Hz]

1

116.89

2

125.16

3

147.5

4

179.6

5

212.16

6

231.62


Eigenfrequency 4 Feet downstream hollow

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Eigenfrequency 4 Feet optimal Position

XFEL Main Girder STUDY

Modus

Frequenz [Hz]

1

146.19

2

151.53

3

155.19

4

175.72

5

179.53

6

239.72

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XFEL Main Girder STUDY

Eigenfrequency Analyze summary

Mineral Cast Girder Eigenfrequency
60
80
100
120
140
160
180
200
220
240
260
280
300
1
2
3
4
5
6
Modus
Hz
3 Feet version
4 Feet downstream of channel
4 Feet downstream of channel hollow
4 Feet upstream of channel
4 Feet version in channel
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Summary


Prototype design is done an launched into production, proto should be
available be in Feb 2009


Eigenfrequency properties of Mineral Cast show good result in
calculations


TO be done



eigenfrequency calculation with beam components


real eigenfrequency measurement & damping measurements


machining surface quality


fragility


feet layout to decide



transport considerations >> mainly for XFEL


possible radiation damage
-

magnet coils also epoxy?


learn more for the XFEL machine



comments are welcome thanks in advance !



XFEL Main Girder STUDY