MPC in Abaqus

Please give me an advise

Hi there,

Im an Abaqus beginner focusing on MPC user-subroutine for my research. I started learning from its manul, example 4.10.8 3DNLG-8: Collapse of a straight pipe segment under pure bending from Abaqus Benchmarks Manual. From mpc part of that example,

*MPC,USER, MODE=NODE

1,301,301,300

1,302,302,300

1,303,303,300

1,304,304,300

1,305,305,300

1,306,306,300

1,307,307,300

1,308,308,300

1,309,309,300

1,310,310,300

1,311,311,300

1,312,312,300

1,313,313,300

2,301,302,303,304,305,306,307,308,309,310,311,312,313,300

I dont understand clearly and have questions asking any guru as following,

- Whats meaning of 1 and 2 in front of each line?. As I understand, 1 stands for depentdent nodes group and 2 for independent nodes group.

-Why it has to repeat node twice in 1?.

Thanks in advance.

KMM.

The first number on each line is an integer key to be used in user subroutine MPC to distinguish between different constraint types. This all depends on the actual MPC subroutine.

-Jorgen

Thanks a lot.

Dr.Jorgen,

As I understood, 1=JTYPE, 301 = dependent node, 300 = independent node. Why do the first nodes (301,302, ...) appear twice in JTYPE 1?

Thanks.