About Direct Harmonic Response Steps

The direct harmonic response procedure calculates the steady-state dynamic behavior of a model directly in terms of its physical degrees of freedom.

See Also
Defining Direct Harmonic Response Steps
In Other Guides
Direct-Solution Steady-State Dynamic Analysis

The steady-state harmonic response can be calculated directly in terms of the physical degrees of freedom of the model. This usually makes the procedure significantly more expensive than mode-based or subspace-based steady-state dynamics. However, it can be more accurate in the following cases:

  • if viscoelastic material behavior is defined
  • if the stiffness of the system is unsymmetric and the unsymmetric terms are important, or
  • if the system contains discrete damping (such as dashpot elements).