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Error in fixed-fixed beam buckling analysis
Posted Oct 11, 2020, 7:58 a.m. EDT 1 Reply
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Hello sir,
While I am doing buckling analysis of fixed-fixed beam, during computation the following error occurs, "Eigen solver 1: The mass matrix is zero". I have applied axial compressive load by using two boundary load at the fixed-fixed end.
Please help me out in this issue. I have also shared the .mph file.
Regards, Vasudha Agrawal
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If your boundary conditions are fixed-fixed, the object cannot deform. A load applied to a fixed constraint is ignored. My guess is that you want to model a situation where there is a fixed constraint in one end, and a guided no-rotation support in the other end. There are several ways to accomplish that, for example
- By using a roller condition instead of a fixed constraint.
- By replacing the fixed constraint with a rigid connector with appropriate constraints and loads
- By modeling half of the structure, and use symmetry conditions.
Henrik Sönnerlind
COMSOL