1. STFC FEA Workshop Part 2
Walter Tizzano

2. Steel structures for compliance with eurocode 3
ESS Facility
Richard Smith, STFC
Steel structures for compliance with eurocode 3

3. RF Distribution System (RFDS) supports
Most RFDS components are standard and can be manufactured from a specification
Whereas the support structures required some design input
Analysed the structure according to BS 5950, the results showed the maximum stresses the structure were below the elastic limit of the material
5.3m
7.4m
9.9m

4. Evolving design and further analysis
The problem of being the first
Among the first major items to be installed, this allowed other departments plenty of time to view the design and consider it as an option to mount their equipment
Sudden requirement changes…
They were asked if the structure could take additional 8 tons, doubling the anticipated load
… and their consequences
With this load increase the yield stress limit was exceeded, based on elastic design method the structure is unacceptable

5. Eurocode 3: Design of steel structures
Use the appropriate standard
Approved by the European committee for standardisation in 2004, Eurocode 3 supersedes BS 5950
A comprehensive standard
Comprises of 20 documents dealing with the different aspects of steel structure design
Eurocode 3 saves money
More economical use of materials than the working stress approach adopted by older codes because the strength of steel beyond the yield stress is fully utilised

6. Limit State Design
Load
Diagram
Elastic Limit
Limit State   ?
Once a plastic hinge has developed in a beam, the additional load will be distributed to other structural members.
This will continue until sufficient hinges developed to result in the collapse of the whole structure

7. Optimisation of Cryogenic moderators for isis ts1
High Energy
Protons
TS1
ISIS Facility
Matt Capstick, STFC
Optimisation of Cryogenic moderators for isis ts1

8. Target Station 1 TRAM Reflector Poison Foil Target Fluid Vessel
Moderator
Vacuum Vessel

9. Parametric Optimisation
Optimisation Process
FEA
Input Parameters
Results of Analysis
External radius
Internal radii
Surface curvatures
Peak stress limited to 83MPa
Max deflection limited to around 0.5mm
Wall thickness

10. Response Surface
Peak Stress [MPa]
Wall Thickness [mm]
Internal Radius [mm]

11. ISIS Facility
Richard Bennett, UKATC
SKA
Thermal Analysis of the SKA Electronics Cabinets Using ANSYS Icepak/Fluent CFD

12. Lessons learned Cumbersome meshing
Quirky, unpredictable meshing with Icepak, different to other FE meshing. It is extremely slow with large models extending the learning curve
Lack of maturity
Niche market software has many more bugs than widely used products
Be careful
With CFD, unlike mechanical FE, it's best to start with low expectations.

13. ANSYS Engineering knowledge management
ISIS Facility
ANSYS
ANSYS Engineering knowledge management

14. Engineering Knowledge Management
Retain and Re-Use Data
Search, meta-data extraction and reporting capabilities allow initiation of new design projects based on knowledge learned from previous design attempts
Standardise on Best Practices
Companies are adopting progressive approaches to eliminate or reduce manual rework. Their goal is consistent and repeatable processes, whenever possible, to reduce costs and improve productivity.
Existing Systems
EKM is a complementary solution to existing systems (PDM/PLM). Integration to commercial PDM systems is available.
Integration with the ANSYS Suite
You can open and save ANSYS Workbench projects directly in EKM, which facilitates updating the local copy and versioning on current projects. The tool extracts project-level meta-data to automatically generate an extensive Workbench project report that summarizes component systems and all related aspects. You can use data to display, identify, search and re-use archived Workbench projects.

15. Simulation for additive manufacturing
ISIS Facility
Adam Scott, 3DSIM
Simulation for additive manufacturing

16. Conclusion Using the appropriate standard saves money
Eurocode 3 supersedes BS 5950 and its failure mode is not yield stress but limit state design, with consequent money savings
Optimisation with ANSYS
Parametric optimisation is a powerful tool for problems with many input parameters and many design requirements but it requires a lot of computational power
Niche CFD solutions
Icepack is a powerful tool for CFD but not as mature as other ANSYS products
Not another PDM
FE Analysis can be managed by EKM that is complementary to PDM and integrates with it and enables engineers to retain and re-use data, and to standardise the best practices