Mechanical Engineering, Indian Institute of 
Science, Bangalore 560 012, India
Optimization hinders evolution!
ME256
Variational methods and structural optimization
Jan.-May, 2008
Instructor:  G. K.
Ananthasuresh, Room 106, ME Building, suresh at 
mecheng.iisc.ernet.in
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  Homework #9 
  
                                                                       
Assigned: Apr. 2, 2009
Due: Apr. 9, 2009
Points: 40
-  
 20 points
We intend to design the cross-section profile of a simply supported staright beam under a sinusoidal point load 
at the mid-point. Our objective is to keep the deflection at two points that are quarter distance away from 
either end as low as possible. The volume of material is the resource constraint. Set up the problem, do the 
sensitivity analysis, and obtain the design equation.  Substantive extra credit  for those 
who implement the optimality criteria algorithm.
 -  
 20 points
Write down your project problem in continuous form. If that is not applicable for a good reason, 
discretized form is fine. Write the necessary conditions and set up the problem for using the optimality
criteria method of solution.