Dynamic calculation

A dynamic calculation is used to determine the dynamic behavior. Dynamic behaviour occurs in many components, and can have a wide range of different causes and load cases. Tasks include e.g. avoiding resonance effects and evaluating load-bearing capacity in the event of operational vibrations, accidental impulses, or loads resulting from earthquakes. There correspondingly exist various calculation methods for a dynamic calculation for describing the dynamic behaviour of components.

 

We have many years of experience in the performance of a wide range of dynamic calculations, both in terms of frequency and over time. Our service portfolio includes the performance of

  • modal analyses for determining natural frequencies,
  • harmonic analyses, typically for rotating loads,
  • PSD analyses for accidental load cases, as with vibration shaker tables,
  • response spectrum analyses for earthquake calculations, and
  • transient analyses for random dynamic load situations in any desired systems

 

The results of the harmonic analysis, the PSD analysis and the transient analysis often provide the basis for the evaluation of operational stability. While harmonic analyses and transient analyses typically determine load cycle numbers on the basis of repetition frequency, and stress variables on the basis of actual loads, PSD analyses utilise statistical methods, e.g. according to Steinberg or Dirlik.

 

You might also be interested in the following pages:

Static calculation for tasks dealing with static or quasi-static loads

High-speed dynamics calculation for arbitrary dynamic load situations

Fatigue assessment

Final theses on the subject of “Dynamic calculations”:

  • Widmann, Th.
    Investigation of the dynamic behaviour of an assembly consisting of individual components utilising the finite element method, on the example of a washing unit, 1996