Laurent Donato, Head of Product Development Laboratory ... · PLM World ‘06 Premium Partners:...
Transcript of Laurent Donato, Head of Product Development Laboratory ... · PLM World ‘06 Premium Partners:...
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PLM World ‘06
Premium Partners:
Cobra: Tower crane with an articulated jib
Laurent Donato, Head of Product Development Laboratory
University of Applied Sciences of Western [email protected]+41 26 429 66 77
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Europe and Switzerland
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University of Applied Sciences of Western Switzerland
16 institutions
6000 students
700 professors
Annual budget : 140 Mio €
aR&D : 14 Mio €
Western CHHES-SO
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College of Engineering and Architecture Fribourg
600 students70 professors70 researchersBudget : 16 Mio €aR&D : 4 Mio €
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Department of Industrial Technology
Services aR&DPost form.Formation
Services
Studies
Research groups
Electrical and electronic construction
Mechanical construction
Chemical and Mechanical Analysis
Industrial automation
Analysis and simulation
Industrial chemistry
Integrated systems
Chemistry
Mechanical engineering
Electrical engineering
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aR&D Collaboration
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Problems occuring with traditional cranes
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New specifications
Basis idea:Harbour’s cranes
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Solution: The Cobra crane
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Cobra’s advantages
Obstacles can be bypassed and criticalareas avoided
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Cobra’s advantages
Several cranes can work simultaneously
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Height under hook is reduced
Fewer tower parts to be assembled
Less ballast
Smaller baseplate
Reduced exposure to wind
Cobra’s advantages
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Optimal extension of the articulated jib
Increased stability of the crane
Higher lifting capacity for equal outreach
Innovation: Mobile counterweight patented
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Sling of the mobile counterweight
Innovation: Mobile counterweight patented
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Center of gravity on the rolling treadto avoid oscillations
Easy assembling of ballast
Innovation: Mobile counterweight patented
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Cable for Front Distribution
Cable for Rear Distribution
Innovation: Antagonistic cables for jibcontrolling
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max 12 m
max 4 m
Maximum truck load: 40 tons
Requirements for road transport
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Risks concerning the staff during assembling and disassembling
E10-1 Schéma 3D Lieux de montage Détail de la connexion Etapes
Montage des éléments de
tour
Détail des connexions A-D
- Un ouvrier attache les
élingues du camion grue à un élément de tour
- Camion grue met l’élément
en position pour le montage
- Le monteur (installé sur l’élément du dessous) fixe l’élément au moyen d’une clef dynamométrique les 8 boulons (au serrage définit) et s’assure de la qualité du serrage
- Le monteur monte au
moyen de l’échelle centrale au sommet de l’élément suivant et détache les élingues
- L’aide monteur attache les
élingues du camion grue à un second élément de tour…etc...
A
B
C
DDefinition of the assembling steps
Chart of preliminaryrisk analysis for each step
Risk Analysis
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Modeler
Drafting
Design with I-DEAS
Assembly
Manufacturing
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Load cases according to European Handling Federation standards
Static and dynamic load cases
Finite Element Analysis
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Blocking during extension of the articulated jib
Breaking of the load cable
Emergency stop during rotation of the crane
Dynamic analysis: Failure mode
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1. Definition of the mechanism in I-DEAS MECHANISM SIMULATION
3
2
1
4
5
67
8 9
10
11
12
13
14
12
10
Dynamic analysis
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2. Computing forces resulting from the mechanism
Dynamic analysis
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3. Integration of the flexible bodies in MSC.ADAMS
Flexible jib# 1
Flexible jib# 2
Dynamic analysis
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4. Solving the load cases in MSC.ADAMS
350 mm
Vertical oscillation of the jib due to breakingof the cable
Δ y
Dynamic analysis
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5. Transfer of MSC.ADAMS results in I-DEAS Response Analysis
Dynamic analysis
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Measures withstrain gauges
Tests on prototype
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Comparison with computational results
Load cases Error on BeamElements
Error on Shell Elements
Static 10 % 5 %
Dynamic 20 % 10 %
Tests on prototype
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Cobra suits European Handling Federationstandards
Computational results confirmed by test measurements
Cobra is ready to be used on a construction site
Versions with a bigger outreach or with higher lifting capacity are being studied
Conclusion