I saw a WWII aircraft engine and it had 3 cylinders connected together in the middle like the benz badge and then there were 8 more of those in a rotated shape for a total of 27 cylinders. It put out about 2000-3000hp
I saw a WWII aircraft engine and it had 3 cylinders connected together in the middle like the benz badge and then there were 8 more of those in a rotated shape for a total of 27 cylinders. It put out about 2000-3000hp
Does Cosmos allow you to determine the mesh element-type, size and distribution? I like solidworks but its analysis tools seem to be way too automatic. For my degree project I used I-DEAS, the modeling tools are useless but it interfaces nicley with SW. The calculations arent as 'pretty' as solidworks but seem to be more accurate.
Also, how do you like CosmosMotion?
It could work though right? I daydream about these things in school. I have plenty of time to perfect it.Originally Posted by jediali
Holy crap jediali, that looks pretty sweet. I had an intro course in Solidworks and about all I could do was draw boxes with holes in 'em! You made that from scratch?
I don't know too much about the advanced techincal side of cars - I just know the basics. I've read up about different engine designs and the vibration and such, but don't exactly understand a balancing rod (is that right?) How does it work? Does it command the way the pistons fire in - because I thought that was the crankshaft. Just help explain this to a fool learning to be an engineer (only 2nd year mechanical).
Isn't this a picture of the crank deformation not stress?Originally Posted by jediali
Also, there only two boundary conditions? One, the left most face of the shaft is fixed, and two the right most face has a torque applied. Is that correct?
"In theory, theory and practice are the same. In practice, they are not."
The advanced package includesOriginally Posted by johnnyperl
cosmosworks - FEA, you can specift mesh options, but it isnt as advanced as abaques or what your talking about. its cad first FEA second.
cosmosmotion - vector motion analaysis
setting up motions, springs, forces, graphs can be a pain but it is very accurate, my calculations tend to agree with it. plus you can create avi's from it
flowworks FEA flow design - computational flow analysis, still figuring this one out
Last edited by jediali; 11-15-2006 at 05:43 AM.
autozine.org
a 2nd year is great and you probably would understand.Originally Posted by Kitdy
I split ALL unbalanced forces form the crankshaft,conrods and pistons into either rotary or reciprocal unbalanced mass. I then designed each COUNTERWEIGHT to cater for each bearing load.
autozine.org
yes, here are all pictures from the test.Originally Posted by Alastor
- stress
- strain
- displacement
- FOS
This was a simple torque test simulating a 500Nm impluse. I then worked down crankshaft keeping the same fixed constraint and twisting the crankpins instead to see how offset torques worked out. The next stage was fatigue testing which was harder because getting an accurate S-N curve is tricky.
autozine.org
Solidworks is quite easy once you get into it. I made them from scratch because i had experience with the software. If you want to make some cool stuff just spend time learning what all the buttons are. Chances are you have used a lot of the features already its just how to best use them. best of luck, if you have any specific questions Kitdy just ask and i might be able to answer.Originally Posted by Kitdy
autozine.org
To revive this:
Today i got an assignment. Guess what it was? I have to design (and animate) the crankshaft,con rod,pistons,valves etc. with Autodesk Inventor(solidworks competitor). It is a bit tough though. I need some sizes and measurements from an engine. I went by a Citroen dealership,but they couldnt really help me any further. (Maybe any one knows some ?) I now email PSAFrance and CitroenNetherlands.
When i get some basic design stuff done i will come back and post screenshots I dont think the piston,crankshaft and con rod will take much longer than an hour to draw ... I maybe just need to resize/adjust it a bit later on.
This engine will also be fitted to the drivetrain i am currently designing and calculating. This will be mounted on a self-designed chassis end of the year. Then we have to cooporate with IPO (industrial product design) students for the body and basic ex/interior design. The best person's designs will be built in 1:1 scale mock-up version next year
Man i love this education We get to do so many really cool things,which also have huge educative value for later What could a clever car nut ask for more ?
I am sorry I kind of forgot to post it. Because of time problems on school i did not complete it entirely back then. The neccesary animation was not done and some components are not exactly to size, for example the crank shaft needed some extra rounded edges and stuff...
For now I have lost the DVD with reports,data, PPT's and 3D-CAD files of the second half of the first semester. When I find it, I will definately not forget about this again
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