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发表于 2007-10-16 23:33:46
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来自 北京
帮助文档里明确的说明其算法是MMA算法,我们是专门做这个的难道还不比你清楚吗?如果没发现说明你根本没看帮助文档,或者就是没仔细看,不要武断的说某个软件不好,要讲究客观情况,毕竟大家都是学马克思哲学的出身的啊.
帮助上的文档:5.12.3.4 Updating the densities using method of moving asymptotes (MMA)
The relative densities of the structure are redesigned using the Method of
Moving asymptotes (MMA), see Svanberg (1987). Normally, the method for
updating the relative densities suggested in Svanberg (1987) is stable. However,
if just a small change in the relative densities lead to a large change in
the responses, it is suggested to use a more conservative (also requires
more optimization iterations) update of the design variables. The update
strategy can be changed using the command DENSITY_UPDATE. The
default setting for DENSITY_UPDATE is NORMAL. Setting
DENSITY_UPDATE to CONSERVATIVE a more conservative update of the
design variables is enforced.
OPT_PARAM
ID_NAME = opt_params
OPTIMIZE = id_of_optimize
DENSITY_UPDATE= CONSERVATIVE
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