I wrote down the equations but at the end i'm still off by a factor of 2...
http://files.engineering.com/getfile.aspx?folder=a26932b6-07b4-42f2-a2c3-ff6746e016c4&file=rbe3_eqs.pdf
The site moved to a new domain past weekend. You can find the file here now.
Why is the moment absorbed at point 1 two thirds of the total moment? I'm looking for the math behind that.
It's not quite that simple...
Using your numbers:
Moment around x-axis in CG: -6 * 1 + 3 * -2 + 3 * 1 = -9
Moment around z-axis in CG: -6 * -1 + 3 * -1 + 3 * 2 = 9
But we should have found the Mcg which is -12 around x-axis and 12 around z-axis.
The correct forces due to the moment are -8...
Hmmm I don't see how Mcg is wrong... My example is almost 2D so it can be drawn on a sheet of paper. Load is applied in (3,3) and is 6 into the paper. CG is in (1,1). That means the moment around vertical is the force multiplied with the horizontal distance, so 6 * (3-1) = 12. Moment around...
I've tried to reproduce loads in an RBE3 with hand calculations, and I can see that the results are wrong, but I fail to see why. Can someone have a look and tell me what i'm doing wrong?
http://communities.ptc.com/servlet/JiveServlet/download/271683-78849/Mathcad%20-%20rbe3.pdf
p1-p3 are the...
We are bolting a lifting eye to a machine for transport. After transport the lifting eye is re-used for the next machine. Force is transferred by friction only. Now we are looking at ASME BTH-1 (2008) to check the strength. (I saw there is a 2011 version and ordered it, but this is typically...
Can anyone point me to a European counterpart of the ASME BTH-1 spec? Preferably British, but other EU will also do.
I'm looking into a lifting eye that is bolted to a machine, where the bolts provide a friction transfer of the load.In ASME BTH-1 the maximum allowable load is n*0.26*A*Fu /...
Can anyone point me to a European counterpart of the ASME BTH-1 spec? Preferably British, but other EU will also do.
I'm looking into a lifting eye that is bolted to a machine, where the bolts provide a friction transfer of the load.
In ASME BTH-1 the maximum allowable load is n*0.26*A*Fu /...