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Innovation Intelligence®
Student Project : Optimization of
crank shaft mechanism france-universities@altair.com
Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Student Project : Optimization of crank shaft mechanism
• Model set up
• Simulation rigid model
• Rod flexibility
• Simulation of flexible model
• Export of the static load
• Topology optimization on rod
• Simulation of flexible model with the new design of the rod
• ELSM optimization
Content
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Student Project : Optimization of crank shaft mechanism
Fixed joint between sleeve and ground body
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Student Project : Optimization of crank shaft mechanism
Translational joint between sleeve and piston with axis from “conrod_feet” point to “translational_axis” point
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Student Project : Optimization of crank shaft mechanism
Revolute joint between piston and rod with X global axis and “conrod_feet” point center
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Student Project : Optimization of crank shaft mechanism
Fixed joint between rod and disks_and_ring
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Student Project : Optimization of crank shaft mechanism
Revolute joint between rod and crankshaft with X global axis and “conrod_head” point center
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Student Project : Optimization of crank shaft mechanism
• Revolute joint between crankshaft and attachment with X global axis and “p_attachment_cg” point center.
• The input velocity is on this joint: 136.136 rad/s
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Student Project : Optimization of crank shaft mechanism
Fixed joint between attach and ground body
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Student Project : Optimization of crank shaft mechanism
Force History on the rod.
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Student Project : Optimization of crank shaft mechanism
Force History :
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Student Project : Optimization of crank shaft mechanism
Rod as Flexbodies
– Craig-Bampton method
– 2 boundary nodes: 1 for piston connection and another for crankshaft connection
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Student Project : Optimization of crank shaft mechanism
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Student Project : Optimization of crank shaft mechanism
Force History on the Rod
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Student Project : Optimization of crank shaft mechanism
Identification times steps where the maximum stress obtained:
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Student Project : Optimization of crank shaft mechanism
Use of the Export Load feature in order to obtain the static load for the topology optimization
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Student Project : Optimization of crank shaft mechanism
• Minimize mass • Stress constraint • Extrusion
constraint • DS • NDS
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Student Project : Optimization of crank shaft mechanism
Interpretation :
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Student Project : Optimization of crank shaft mechanism
Stress History :
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Student Project : Optimization of crank shaft mechanism
• 6 shapes variables
• Minimize mass
• Stress constraint
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Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Student Project : Optimization of crank shaft mechanism
Before/after optimization comparison :
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Innovation Intelligence®
Pour toute information supplémentaire,
veuillez contacter : france-universities@europe.altair.com
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