petedow Posted February 17, 2014 Posted February 17, 2014 I am currently trying to model a seat for a peice of equipment. The peice of equipment will be bolted to the seat. The seat will be bolted to the floor. I have modelled the seat. I am wanting to know if it is possible, instead of calculating the bolt forces by hand and then applying them to the bolts. If it is possible to make a mass with a given CoG that will then automatically generate the bolt loads in all directions. Or apply the mass force from where the CoG should be. Any help or point me to somewhere who may be able to help would be great! Cheers, Quote
JD Mather Posted February 17, 2014 Posted February 17, 2014 What book are you using to learn Inventor FEA? Have you gone through the FEA tutorials? Quote
petedow Posted February 18, 2014 Author Posted February 18, 2014 I have used the tutroial files that come with Inventor (inventor professional 2012) along with the book 'Mastering Autodesk Inventor and Autodesk Inventor 2012'. Quote
JD Mather Posted February 18, 2014 Posted February 18, 2014 I don't think those books cover Inventor FEA. Search Amazon for Wasim Younis book 1. Also, what version of Inventor are you using. Quote
petedow Posted February 18, 2014 Author Posted February 18, 2014 Thanks! I'm using Professional 2012. That book looks like it should do the trick, although I was not looking to spend money. Quote
Bishop Posted February 18, 2014 Posted February 18, 2014 There is probably nobody on earth, whether employed by Autodesk or not, that knows more about Inventor's simulation capabilities than Wasim Younis. Get his books - it will be money very well spent. Quote
Lazer Posted February 20, 2014 Posted February 20, 2014 Yes fantastic book I have it and I have been personally taught one to one by Wasim on a FEA and Dynamic Simulation course I took a few years back and he is also great in person. Quote
petedow Posted February 25, 2014 Author Posted February 25, 2014 I got the book which will be of help for some things but I had a quick flick through and I dont believe it shows how to model a mass with a given CoG. Can anyone point me in the right direction? Quote
Bishop Posted February 25, 2014 Posted February 25, 2014 Easiest way to do that is to just model your part as per normal procedures, then WHEN AND ONLY WHEN IT IS COMPLETE, go to the PHYSICAL tab in your iProperties. Find the CG for X / Y / Z axes, and then use the MOVE BODY tool to put your CG at 0,0,0 or wherever else you want. If I've misunderstood your requirements re: CG, and what you're trying to do is create a part which will always be balanced around a given CG ... that, I don't think there is an automated way to accomplish. That will just take careful planning and layout work ahead of time. Quote
petedow Posted February 26, 2014 Author Posted February 26, 2014 I managed to solve this. A lot simpler than I thought by modelling a rectangle with a given density. Using Excel to play about with the dimensions I was able to get the correct Mass and CoG I was looking for. Many thanks for the help. Im sure ill have some more posts to come since im a relative newcomer to the software. Quote
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