Abaqus Warning

[elahe337]

hello, everyone.
I'm quite new in Abaqus and I'm facing this warning in my modeling constantly:
1. Boundary conditions are defined at the the nodes contained in node set WarnNodeBcIntersectKinCon. In addition the nodes are also part of a surface involved in kinematic contact. The kinematic contact constraint will be overridden by the boundary conditions in case of a conflict. Penalty contact may be used instead.
2. The slave surface in node set WarnNodeMassRatio3fix-step1 have much larger masses than the nodes on the master surface. significant contact noise may result. suggested workarounds include setting the WEIGHT parameter so that what was the master surface becomes a pure slave surface in contact pair, using mass- scaling to adjust the ratio of nodal masses, or using the penalty contact algorithm.
how should I solve these errors?
any response from you will be appreciated.

 

[FEA way]

The first warning tells you about overconstraint - it seems that you applied boundary conditions and kinematic contact to the same region. This should be avoided.

The second warning lists several ways of handling the issue. It's up to you which one you will choose.

Both warnings should disappear if you use penalty contact.

 

[Latexman]

elahe337,

In the future, please title every post.

Right now, please Report (red flag) your original post and ask admin to change the title to something more useful.

Good Luck,
Latexman