Contents


A new calculation method - Footfall analysis is implemented in FEM-Design 18. This calculation method allows for checking the structure's response for an excited vibration.

Download

Get familiar with the theory behind the footfall analysis and verification examples: Footfall analysis - theory and verification examples

Video presentation

Watch the video presentation of the Footfall analysis feature.

Webinar

Watch the webinar, where the Footfall analysis is described in details.

Definition

Self excitation region or Full excitation point shall be defined in Loads -> Footfall analysis data. It is required that masses are defined, since Eigenfrequency calculation will be executed during Footfall analysis.

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Calculation

The calculation can be started in Analysis/Calculations/Footfall analysis. The settings for the calculation can be found under the Setup.... Here one can select one of the three available methods:

  • Self excitation
  • Full excitation
  • Rhythmic crowd load*

*Load case shall be selected with this method.

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It is important to choose the correct method (Self excitation, Full excitation or Rhythmic crowd load), because the analysis will run according to the selected method, even though it’s possible to define both self excitation regions and full excitation points.

Results

After Footfall calculation, one can check the Eigenfrequency results (masses, vibration shapes), the nodal accelerations and the nodal response factors.

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In Detailed result one can see the response factor – frequency diagram of a point, if a Response factor or Acceleration result is shown. Every previously placed point is remembered and named. These points can be deleted with Delete option. Their name and font can be set by Properties option.

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These results can be listed in Analysis/Footfall analysis.

Reference

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Created by IwonaBudny on 2018/09/25 13:44
   
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