Natural mode contribution display

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Natural mode contribution display

Challenge: Display natural mode contribution ratio effectively

Natural modes as well as panel contribution ratios derived from MSC Nastran are displayed, which are quite important information to analyze mechanism of the phenomenon and resonant peaks.
However, it requires a software to display them effectively since the output data of contribution ratio from MSC Nastran is text data and it is often hard to find outstanding modes which act on the peak.

How to resolve pains:

Applying ESTECH.PlotTool makes the graphical display of the contribution ratio data from MSC Nastran effectively. The data are as follows.

  • MCFRACTION(Contribution for natural mode of vibration response)
  • FLSPOUT(Contributions for structural mode regarding presser response/acoustic mode/acoustic load/panel/panel structural mode/node mode)
  • PFMODE/PFPANEL/PFGRID(Contributions for structural mode/acoustic mode/panel/panel structural mode/node mode)

plottool_fig.gif

Strength of the Software
  • Applying the software together with ESTECH.NAST+ generates extra contribution ratio outputs which does not come out from ordinary MSC Nastran calculation, such as contribution ratios and modal acoustic radiation coefficients.
  • Even though there are more than 1000 modes, substantial contribution modes and/or panels are to be identified instantly.
  • Five different displays are selective respectively, which enables to analyze phenomenon from multidirectional viewpoints.
Software to be applied
*The name of company and/or individual product name mentioned above are either trademark or registered trademark.

ISID Group Companies

  • Information Services International-Dentsu, Ltd.

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