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From: pbn@I_should_put_my_domain_in_etc_NNTP_INEWS_DOMAIN (Prasanth Nair)
Subject: Re: Any testing sample for this kind of GA ?
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Date: Mon, 1 Jul 1996 12:10:52 GMT
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Shen-Yeh Chen (sychen@PROBLEM_WITH_INEWS_DOMAIN_FILE) wrote:
: Recently we just finished one GA optimizer in F77. We solve it on some
: strcutural mechanics design problem, involving topology(0/1 variables),
: table searching (integer) and shaping (real number) design variable. 
: It works fine, and our new operator works just more efficient and reliable.
: (It seems to be problem-independent, which we think is attractive). I am
: wondering if there is any testing sample for these kind of problems?

: Thanks a lot.


Great to see a posting from somebody working on Structural Optimization. 
If you are interested in comparing your variant GA, I suggest you take up 
the structural design problems from the following references. 

S.D.Rajan., 1995, "Sizing, Shape and Topology Design Optimization of Trusses 
Using Genetic Algorithm," J. of Structural Engineering, ASCE Trans. October.

Grierson,D.E., and Pak, W.H., 1993, "Optimal Sizing geometrical and 
topological design using a genetic algorithm," Structural Optimization, 
Vol. 6, 151-159.
  

If you would like to compare your algorithm for topological optimization 
alone, refer to a paper by Dhingra and Bennage. This paper deals with 
the application of Tabu search techniques to structural topology design. 
Source : International Journal of Numerical Methods in Engineering..
I don't recollect the exact vol. I believe it appeared in print 
somewhere in 1995. The other work on topological design using GAs is 
by Prof. Jakiela and his colleagues at MIT. One of their papers appeared in 
the Journal of Mechanical Design, ASME Trans. 1995. However the best 
strategy or structural topology design appears to be the variable complexity 
GA presented in a recent paper in the AIAA Journal, Dec '95 issue.

Hope this was of help...

BTW, I would appreciate it if you could let me know whether you used a 
penalty function approach for dealing with infeasible/unstable topologies 
or a string coding which automatically maps on to a feasible topology. 



Regards
P.B.Nair


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