Assume z axis is vetical.,Material A790S31803

suppose I draw a pipe in z -direction of 2000 mm (node 10-20)and bend and then turn to y -direction of 2000 mm.(20-30).Design parameters temp.100 deg cent.,pressure 5 bar.i placed anchor at node 10 and 30.when i run the analysi,checking the restraint summary, i can observed forces in y & z directions and moments in x-direction only.why?

suppose the same pipe if i draw in x-direction instead of z direction 2000mm(10-20)and bend and then turn to y -direction of 2000 mm.(20-30).with the above design parametersi placed anchor at node 10 and 30.when i run the analysi,checking the restraint summary, i can observed forces in x,y,z directions and moments also in x,y,z direction. why?
can you explain?

In your first system "weight" acts in the plane of the two elements. In the second system "weight" acts out of plane.

In the second system, set the pipe density to zero and rerun.

Hi Richard,

Thank you for your reply.Can you explain in brief ,what is weight acting in plane and weight acts out of plane.

Dear Richard,
Could you please explain this in brief!

Your first system is in the YZ plane. Weight will act in the -Z direction. This will cause "Y" and "Z" reactions, as well as an "MX" reaction.

Your second system is in the XY plane. Weight will still act downward in the -Z direction. This will cause moments about both "MX" and "MY", which will be balanced by "X" and "Y" forces. Of course you will still have "Z" reactions also.