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Patrick Bandeira de MelloFelipe Moura Fontes Novo
Analysis and Simulation of Rear
Suspension Architecture for a Formula SAE
Vehicle Using ANSYS Software
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Problem Description
Methodology
Goals
Conclusion and Next
Steps
Company Overview
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Formula SAE
2006 2007 2008 2009 2010
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Competition Layout:
Friday:
Morning: Engineering Design………………150 points
Afternoon: Cost Analysis..…………………. 100 points
Business Presentation..……………………..075 points
Saturday:
Morning: Skidpad……………………………. 050 points
Morning: Acceleration Event………………. 075 points
Afternoon: Autocross Event……………….. 150 points
Sunday:
Endurance Event…………………………….. 300 points
Fuel Economy Event………………………… 100 points
Formula SAE
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Needs for a Formula SAE Rear Suspension Design:
Ease of Adjustability
Ease of Maintenance
Lower Mass
Low Compliance
Low Cost
Short amount of time
available between events
Increased Vehicle
Performance and
Predictability
Resource Management
and Cost analysis
evaluation
Formula SAE
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Problem Description
Methodology
Goals
Conclusion and Next
Steps
Company Overview
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Identifying the problem
- Data Acquisition
- Compliance leading
to unpredictable
behaviour
- Validation
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Problem Description
Methodology
Goals
Conclusion and Next
Steps
Company Overview
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Development
Double Wishbone H-arm & Camber Link
H-arm & Wishbone
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Based on Data Acquisition, for the following conditions:
1 - Positive Longitudinal Acceleration of 1.2g
2 - Positive Longitudinal Acceleration of 0.8g and Lateral
…..Acceleration of 1.4g
3 - Lateral Acceleration of 1.75g
4 - Negative Longitudinal Acceleration of 0.35g and Lateral
…..Acceleration of 1.2g
5 - Negative Longitudinal Acceleration of 0.35g
Vehicle Dynamics Load Case Calculations
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Spreadsheet based on Lateral and Longitudinal Load Transfer
Vehicle Dynamics Load Case Calculations
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Analysis Method
Control Arms Wheel Carrier
Computational capacity saving
SAE coordinate system
Better mesh refinement
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Mesh
230k nodes
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Loads
Cylindrical support fixed in
axial direction.
Not considering Brake Caliper
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Results
Deformation Stress (Von Mises)
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Contacts
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Joints
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Meshing
80k nodes
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Meshing
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Loads
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Results
Deformation
Stress (Von Mises)
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Results
Deformation
Stress (Von Mises)
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Results
Deformation
Stress (Von Mises)
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Results
Analysis Data & Decision Matrix
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Problem Description
Methodology
Goals
Conclusion and Next
Steps
Company Overview
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Conclusion and Next Steps
Suspension Architecture:
1st place: Double Wishbone
2nd place: H-arm and Wishbone
3rd place: H-am and Camber Link
Next Steps:
Overall System Validation
System Mass Reduction
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We’d like to thank
Questions ?