multibody analysis of a vending machine structural and dynamic optimzation
TRANSCRIPT
Multibody analysis of a vending machine
Structural and dynamic optimzation
Turin 23 April 2013
Ing. Marco Morrone
1. SUMMARY
A. Altran Italia
B. System description
C. Analysis strategy and results
D. Conclusion
1. SUMMARY
A. Altran Italia
B. System description
C. Analysis strategy and results
D. Conclusion
ALTRAN ITALIA
MARKET DRIVERS
Time to market and development costs reduction are some of the most important target during project activities of new mechanical systems in every industrial sector.
CAE analysis is the most important method to reach these targets
Altran has developed a CAE competence center in order to perform the most important virtual analysis requested by the market,
CAE Competence center is able to perform analysis and to develop new methodologies for the following analysis types:
FEM analysis
CFD analysis
Multibody analysis
Virtual validation Solution
o About 100 employees working in research & development.
o Consolidated project management approach.
o Structured working flows and operative procedures for both
Product and Innovation development processes.
o Product development supported by advanced virtual validation
methods in both Design and Lab test stages.
o The company holds the patents related to the technology of its machines.
N&W is leader for the production of vending machine and it is always in research of innovative solutions:
N&W partenrshiip
1. SUMMARY
A. Altran Italia
B. System description
C. Analysis strategy and results
D. Conclusion
Aim of the project
The aim of the project is to optimize a mechanical system of a vending machine .
The optimization targets are :
• Remove or reduction of impact phenomenas
• Generation of a smoothly motion
• Reduction of engine torque
• Structural improvement of engine frame
System
The system is composed by :
• Cam
• Screaper
• Shifter
During its work the system is able
to produce hot beverage through an
infusion process
MB Model
• MB Model is composed by rigid
bodies.
• There are contacts between :
• Cam & scraper
• Cam & shifter
• Poisson contact model with
coloumb friction is used in the
model
• Costant speed rotation is applied
on the center of the cam
1. SUMMARY
A. Altran Italia
B. System description
C. Analysis strategy and results
D. Conclusion
During this phase the following analysis were performed
Definition of motion profile
Run with out contact with motion imposed for
every part of the system
Creation of CAM profile
During this phase the following analysis were performed
Contact introduction
Friction introduction
Analysis of the requested torque to the electric engine
Choose of the electric engine
1. Heading
Phase 1
Cam profile definition
Phase 2
Engine Torque
OPTIMIZATION
LOOP
During this phase the following analysis were performed
Calculation of the force acting on the system from MB Model
Generation of FE model for the support system
Static analysis for the worst load
Choose of the suitable material for the system components
During this phase the following analysis were performed
Topological optimization
Improvement of the stiffness for several components
Reduction of component material
1. Heading
Phase 3
Structural Analysis
Phase 4
Optimization
1. SUMMARY
A. Altran Italia
B. System description
C. Analysis strategy and results
D. Conclusion
Conclusion
From the multibody and FE analysis, the following results have been obtained:
• Smoothly motion of the scraper and shifter
• Reduction of engine torque
• Reduction of the acting forces on the fixing frame
• Improvement of the frame stiffness
• Reduction of material of the fixing system
• Reduction of time to market
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