just use SIMPLE pattern
thanks :) .....but it's a big sheet so this method take's too long time...is there any other way?
If it's a big sheet and you don't need to calculate the mass of your product, just use the appearance. Anyway if you have to calculate the weight, just create small one size say 1X1 unit and check how much the weight loss when you create the hole, then interpolate to the overall model, you will get the weight of perforate sheet.
Hahahah this operation in IV will kill any computer, even super computers could not agree more with Loannis as to his answer about computing power and patterns. @ Charoenpon SPOT on with your answer :)))))
Pure engineering approach. Nice one Charoenpon...
Unfortunately Majd I have to agree that is difficult to compute such a big pattern!!!