1. Shipping Support Post Analysis
Colin Narug
June 27th, 2019

2. Setup
For the complete analysis of shipping design/analysis, multiple steps have been performed
Load distribution to the posts
While it is being shipped
Pitched or rolling during transport
Under higher gravitational loads
Post reaction
Design parameters for shipping frame
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3. Load Configurations
Range of gravitational accelerations found that the shipping container will experience
While each condition may be slightly different, the worse case scenario will be when it is being offloaded
Shipping values are assuming a 20g load
will be reduced to 2 G with a 1.5 SF
G load includes gravity
Back Support
Middle Support
Front Support
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Hapag-Lloyd Contaner Packaging Brochure, located in \project\US-HiLumi\Magnets\CM&Cryo\Shipping\Shipping Container Information

4. Load Distribution to the Posts
Due to uneven distribution inside the cold mass, full FEA analysis of cold mass needed
Simplified cold mass
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5. Load Distribution Reaction Turing Shipment
Pitching
0-45° of pitching
Stress less than 25 MPa
Peak deformation less than 0.04 mm
Rolling
0-45° of rolling
Stress about 35 MPa
Peak deformation about 0.26 mm
Lower angles are less of an issue
@15° 0.13 mm of deformation
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6. Higher Loads Higher gravitational loads used on model
Up to 3g in various loading conditions
Difference between forces and deformation at supports also found
Forces difference critical for success of frame design
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7. Displacement Tolerances and Rolling Strain
Support Post and Shipping Support Post tolerances will constrain design of structure.
Support post has unknown vertical tolerance and radial tolerance of 11 mm
Strain in magnet body is next to zero
High peak deformations are a result of the deformation of the post
3G Model of rolling direction accelerations has highest deformation
To have a basis of comparison, the peak strain in the tack block simulations was mm/mm
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8. 3G “Rolling” Strain
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9. Modes, Bolt Strength, and Welds
During shipping, vibration of transport could cause resonance
Modes of Cold Mass and Post Found
Of the overall shape, not individual components
Results may vary
Under 1G vertical acceleration pre-stress
Bolt connections will be fine under largest 3G load
A bolt with a tensile strength of at least 826 MPa should be used
A325 Bolt
One of the weaker of the high strength bolts
Welds between saddle will be under load
Total allowable force per saddle welds
308.9 kN
Highest load from simulation
186.1 kN
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10. Post Reaction
While the results for the larger model showed the post will be fine, the details of the post were removed in those models
Using previous model, new loads were applied
Largest load seen at any post
Modes found, will not be an issue
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11. Post Reaction Results If a SF is not needed, design is sufficient
If a SF is needed, or stress is not acceptable, steel with yield strength of at least 400 MPa needed.
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12. Frame Due to differences in loads, frame was reexamined briefly
“Springs” in system will have to meet 3 criteria
Minimize deformation in structure
Avoid oscillating at natural frequencies of structure
Potentially an issue
Absorb some horizontal forces
from post directly
B. Thomas, et al., "Move of a large but delicate apparatus on a trailer with air ride suspension".
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13. Conclusion
While some aspects of the cold mass may survive shipping, its overall survivability will depend on multiple factors
Strength of bolts is sufficient
Strength of internal cold mass components
Can cold mass support being held vertically under 3G load?
If magnet not in contact with shell, structure will fail
Frame design is crucial
Other loads on frame, i.e. cryostat
Spring-damper system
If the spring system is chosen improperly, difference in loads on each post could cause significant, uneven deformation
Apx. 80 kN difference in load at most
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