latlat beam test workshop 20th march 2006 1 glast program beam test workshop cu outer shipping...

20th March 2006 1 GGLASST Project

LAT

Beam Test Workshop

GLAST ProgramBeam Test Workshop

CU Outer Shipping Container

Michele Pinchera [email protected]


LAT

Beam Test Workshop

CU OSC - Overview

Purpose and Design Requirements

Overall Design

Design Criteria

Verification

Schedule


LAT

Beam Test Workshop

CU OSC - Purpose

• The CU Outer Shipping Container must be capable of transporting and storing the Beam Test CU without damage per the requirements stated in the LAT and MIL applicable documents


LAT

Beam Test Workshop

CU OSC –Design Requirements

• Transportation Environment1. Transport Accelerations vs CU allowable accelerations

Analysis assumes applied environmental load occurs simultaneously in all three axes

Wire ropes isolators in compression/roll orientation

2. Temperature and HumidityThe container shall maintain temperature and humidity requirements as required for the

instrument per LAT-MD-00404, "LAT Contamination Control Plan“

GN2 overpressure inside OSC

Mode Logitudinal Acceleration

Lateral Acceleration

Vertical Acceleration

CU Max Allowable +/- 1.25 g +/- 1.25 g +/- 3.0 g Truck +/- 3.5 g +/- 2.0 g +/- 6.0 g

Mode CU Limit Temperature +5 °C to +40 °C

Humidity less than 50 RH


LAT

Beam Test Workshop

CU OSC – Design Requirements (continued)

• CU-ISP Interface• Mounting Interface for the ISC interface plate• Adequate clearance between CU shipping volume and inside of the OSC

cover to allow for:1. Safe cover removal and installation2. Predicted dynamic motion of the CU-ISC

• Transport Truck Payload Limits

OSC mass limit = 750kg OSC volume limit (lateral x longitudinal) = 2000 x 3000 mm

Mode Standard truck limits Payload mass 1500kg

Payload volume 2000 x 3500 mm


LAT

Beam Test Workshop

CU OSC – Overall Design

Cover

2 Breather Valves

Humidity Indicator

GN2 Connector

Cover aligment pin

Pressure Gauge

GN2 Connector

OSC external surface protection: clear anodization

ZY

XLAT coordinate ref. system

• OSC Transport Configuration

2.3 m1.85 m

1m


LAT

Beam Test Workshop

CU OSC – Overall Design

Base Plate Pallet

Lifting Fixture(Steel)

O-ring Groove

ZY


OSC Lifting Stems

• OSC Primary Structure


LAT

Beam Test Workshop

CU OSC - Overall Design (continued)

• CU-ISC Integration within the OSC

Wire Ropes Isolators

ISC Interface Plate

CU-ISC

OSC-ISC Interface Plate

Z Y



LAT

Beam Test Workshop

CU OSC – Design Criteria

• Base Plate and Pallet act as primary structure carrying load of OSC

• Loads determination and stresses analysis by means of Hand Calculations and FEA Model for:

– Cover– Base plate and Pallet– Lifting Fixture– Interface Plate– Bolted and Welted Joints

• Mass Properties of ISC Payload– Mass 750 kg, MAX– CG (45 mm, -152 mm, 182 mm) from Interface Plate on respect of OSC CG

• Factors of Safety– Yield Design Load FS = 3.0– Ultimate Design Load: FS = 5.0

• Structural Margins of Safety Must be Positive


LAT

Beam Test Workshop

• Proof Load Test– Lifting equipment proof test

• Test items: Base plate, pallet and lifting fixture

• Test with a dummy load as close as possible to, but not exceeding 125% of the rated load

• Edgewise Drop (FED STD. 101C)

• Test items: OSC, ISC, grid simulator, mass simulators

• Height of drop: 0.23m (9 inches)

• Leaks Test• Test item: cover, base plate

• Load cycles from min overpressure of 0.05atm (value at INFN integration building, 2m altitude) to max overpressure of 0.2 atm (value at max INFN-CERN route altitude, 1381 m)

• Static leaks test at min overpressure (<0.1atm). Duration of at least 30min with no leaks

CU OSC - Verification

dummy

9”

GN2

6”sill


LAT

Beam Test Workshop

CU OSC - Schedule

Milestones:

Ready for Proof Tests by May 15

Ready for Integration by May 22

latlat beam test workshop 20th march 2006 1 glast program beam test workshop cu outer shipping...

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