Total Solution for Structural Optimization
OPTISHAPE-TS
case study 02 : The Lightweighting of Road Wheel
- Consideration to The Production Requirements. -
Outline
The car road wheel's design needs to consider mechanical characteristic and the necessary conditions for manufacture.
It's possible for nonparametric shape optimization function of OPTISHAPE-TS to optimize while considering these conditions.
On this page, the example in consideration of the conditions for manufacture to a two-wheeled vehicle road wheel is introduced.
Analysis Model
Road Wheel
- Scale : diameter 600*150 [mm]
- Element type : Second-Order Tetrahedral Element
- Number of Elements : 38,625
- Number of Nodes : 72,630
Optimization Condition
Upkeep of the initial stiffness, and the lightweighting in consideration of a production problem.
- Object : Volume Minimization ( = Lightweighting)
- Constraint : Stiffness (for 3 loads)
- Constraint for the production requirements :
- Die Drawing
- the smallest wall thickness
- 1/3 periods symmetry shape (using MPC)
Load, Constraint Condition
Plural load to the wheel's rim, and bolt hole is restricted completely.
Consideration to The Production Requirements
Production Requirement 1 : Die drawing is possible.
Production Requirement 2 : Thickness more than fixed.
-> Using "Shape Restriction Function".
Production Requirement 3 : Sporkes are rotary symmetric shape.
-> Using "Shape Restriction Function by MPC".
Result
The road wheel was lightweighted, with various kinds of restrictions.
- Time : 43 min
- The optimization repetition number of times : 50 times
- OS ： Red Hat Linux
- CPU ： Core2Quad 2.66GHz
- Memory : 844[MB]
! Lightweighting about 11% !
* Result Shape that had not been applied to MPC.
