SiD Platform Deformation Studies
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SiD Platform Deformation Studies John Amann ILC Mechanical Engineering 11/21/06
description
SiD Platform Deformation Studies. John Amann ILC Mechanical Engineering 11/21/06. Disclaimer: The designs and models for the detector, supports, and mobile platform used for the ANSYS simulations are crude at best and simplified to speed computation. - PowerPoint PPT Presentation
Transcript of SiD Platform Deformation Studies
SiD Platform Deformation Studies
John AmannILC Mechanical Engineering
11/21/06
Disclaimer:
The designs and models for the detector, supports,and mobile platform used for the ANSYS simulations are crude at best and simplified to speed computation.The actual designs and subsequent performance may differ vastly. Scales are exaggerated on ANSYScontour plots for visual effect.
SiD SolidEdge 3D Model
Detector, supports, and platform one completeunit made of A36 steel.
Young’s Modulus=30e6 PSI
Poisson’s Ratio=.27
36 Air Caster Platform SolidEdge 3D Model
Air casters, steel beams,and plates one completeunit made of A36 steel.
Young’s Modulus=30e6 PSI
Poisson’s Ratio=.27
Both units imported intoANSYS as IGS and fused into one volume.
Platform Bending Along Beam Axis
Detector and platformassembly placed on rigid20x20x5m A36 steel IRfloor, restrained all DOF.
Surface contact with staticfriction modeled.
No gravity.313 PSI applied here.
282 PSI applied to row of 6 air casters at front and back edges of platform.
Max y displacement = 3.40mm.
Platform Bending Along Beam Axis Front View
Detector y displacement
= 0.70mm.
Platform Bending Along Beam Axis Side View
Platform Bending Transverse to Beam Axis
313 PSI applied here.
282 PSI applied to row of 6 air casters at right and left edges of platform.
Max y displacement = .96mm.
Platform Bending Transverse Beam Axis Front View
Detector y displacement = 0.70mm.
Platform Twisting
313 PSI applied here.
282 PSI applied to 3 aircasters at front left corner and back right corner of platform.
Max y displacement = 1.40mm.
Platform Twisting Front View
Detector y displacement = 0.71mm.
Platform Lifted From Left Side
313 PSI applied here.
282 PSI applied to row of 6 air casters at left edgeof platform.
Max y displacement = 0.88mm.
Platform Lifted From Left Side - Front View
Detector y displacement = 0.71mm.
Semi-Realistic SiD Support Structure
A36 Steel W Shape I-Beams(~1m x .5m)
Detector Rests on I-Beams
Platform for Semi-Realistic Sid Support Structure
A36 Steel W Shape I-Beams
A36 Steel Web Plates
.75m Radius Air Casters
A36 Steel .125m Base Plates
A36 Steel .125m Top Deck (not shown)
A36 Steel .25m Bar Stock
Platform Twisting
313 PSI applied here.
Detector y displacement = 0.78mm
Platform Twisting
282 PSI applied toopposite corners.(8 ACs)
Y max displacement= 3.74mm.
Platform Bending Along Beam Axis
313 PSI applied here.
Detector y displacement = 0.83mm.
Platform Bending Along Beam Axis
282 PSI applied to front and back rows.(18 ACs)
Y max displacement = 3.20mm.
Platform Bending Transverse Beam Axis
313PSI applied here.
Detector y displacement = 0.68mm.
Platform Bending Transverse Beam Axis
282 PSI applied to allfour corners.(16 ACs)
Y max displacement = 6.65mm
Platform Bending Transverse Beam Axis
Thinner yoke to reduce stiffnessof assembly.
313 PSI applied here.
Platform Bending Transverse Beam Axis
282 PSI applied tofour corners.(16 ACs)
Platform Bending Transverse Beam Axis
Yoke deforms under313 PSI load.
Detector y displacement = ??.
Platform y displacement = 0.45 – 1.1mm
Platform Bending from Left Edge5cm steel floor plate on 5m concrete foundation.
313 PSI applied here. 282 PSI applied to left side.(12 ACs)
Platform Bending Transverse Beam AxisAsymmetric distortion.
Concrete floor restrained all DOFat bottom surface.
Steel plate restrained all DOFat all sides.
Platform Twisting
313 PSI applied here. 282 PSI applied to opposite corners.(8 ACs)
Platform Twisting
Asymmetric distortion.
Platform Bending Transverse Beam AxisComparison of “Warning” Mesh Elements vs. Distorted Plate
Platform Twisting with Gravity
Coarse mesh for fast computation = circlesbecome polygons.
Want to investigate distortion of centralbarrel. Must use globalgravity vs. 313 PSI.
Platform Twisting with Gravity
Displacement is uniformaxially across central barrel.
Distortion of barrel geometry due to coarse mesh.
Platform Twisting with Gravity
Displacement ofplatform structure = -.49mm to +1.67mm.
Displacement is uniform transversely across central barrel.
Work In Progress……
• Add details of steel yoke plate structure to detector model. (CMS style or BaBar style?)
• Create SolidEdge model of solenoid/calorimeter.
• Simulations with more realistic models and cyclical loading of IR floor.
