Finite element methods for dynamic analysis employing elements with drilling degrees of freedom are presented. The formulation is based on a variational principle in which displacements and rotations are interpolated independently. The issue of zero masses corresponding to rotational degrees of freedom is addressed and techniques for defining consistent and lumped rotational mass matrices are presented.
|Number of pages||18|
|Journal||International Journal for Numerical Methods in Engineering|
|State||Published - 15 Oct 1995|
- finite elements
- independent rotation fields
- rotational mass matrices