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  1. Hi! I have performed free size optimization and it ran successfully. However I have some questions relating to some of the upper and lower limits and design variables required to enter. After checking the optimization book provided by altair I still do not completely understand in design variable in the parameter option the mindim is what exactly and how to choose it appropriately? As I have chosen different values and it shows different results. Moreover, I chose Volfrac as the optimization constraint and chose upper limit as 0.2 but I am not sure what this represents? As in volume option upper limit showed the volume in mm^3 but volfrac I am not sure what it represents. Another main question I have is that when setting load collectors I can add as many but in Loadstep for load and constraint theres only two options. How can I add two loads and one constraint for my analysis? Please let me know I know this is a long one but your help would be much appreciated. I am attaching my file over here and if you could please take a look to see if my results are appropriate or not? Freesize opt try 1.hm
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