How can you account for dynamic effects in FEA simulations?

1 Choose the right type of analysis

Depending on the nature and frequency of the dynamic effects, you may need to perform different types of FEA analysis. For example, if you are interested in the steady-state response of a component to a harmonic load, you can use a modal analysis or a frequency response analysis. If you want to capture the transient behavior of a component to a random or shock load, you can use a time history analysis or a response spectrum analysis. Each type of analysis has its own advantages and limitations, so you need to choose the one that best suits your problem and objectives.

3 Select the suitable material properties

Material properties are another key factor that can influence the dynamic effects in FEA simulations. Material properties include the density, elasticity, plasticity, and damping of the material that you are modeling. You need to select the material properties that are appropriate for the loading and deformation conditions that you are simulating. For example, if you are modeling a component that undergoes large strains or plastic deformation, you need to use a nonlinear material model that can account for the stress-strain behavior and the strain rate effects. If you are modeling a component that dissipates energy due to internal friction or viscoelasticity, you need to use a material model that can account for the damping effects.

4 Apply the relevant meshing and solver settings

Meshing and solver settings are also crucial for accounting for dynamic effects in FEA simulations. Meshing refers to the process of dividing your model into smaller elements that can be solved numerically. Solver settings refer to the parameters and options that control how the FEA software solves the equations of motion. You need to apply the meshing and solver settings that are suitable for the type of analysis, the geometry, and the accuracy that you want to achieve. For example, if you are performing a modal analysis, you need to use a fine mesh that can capture the higher modes and a solver that can extract the eigenvalues and eigenvectors. If you are performing a time history analysis, you need to use a mesh that can handle large deformations and a solver that can integrate the equations of motion with an appropriate time step and damping ratio.

5 Validate and verify your results

The final step for accounting for dynamic effects in FEA simulations is to validate and verify your results. Validation means comparing your results with experimental data or other sources of information that can confirm the accuracy and realism of your simulation. Verification means checking your results for errors, inconsistencies, or anomalies that can indicate problems with your model, boundary conditions, material properties, meshing, or solver settings. You need to validate and verify your results to ensure that they are reliable and meaningful, and to identify and correct any sources of error or uncertainty.

6 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?