Aerodynamic Flutter Data dialog box

Modeling Object
Name	A descriptive name for this modeling object.
Label	Specifies a unique numerical identifier for this modeling object.
Properties
Description	Lets you enter a brief description. Click to open a text editor where you can enter a longer description.
Flutter Analysis Method	Lets you specify the flutter analysis method.K MethodK-methodPK MethodPK-methodPK Method with no LoopingPK-method without loopingKE MethodK-method restricted for efficiency
The following options appear when Flutter Analysis Method is set to K Method or KE Method.
Pressure Altitudes	Lets you specify the pressure altitudes to use in the flutter analysis.Select an existing pressure altitudes modeling object from the list or click Create Modeling Object to create a new one.Click Edit to edit the selected modeling object.To filter a long list of modeling objects, click More Options to display options for searching and filtering the modeling objects.
Density Ratios	Lets you specify the density ratios to use in the flutter analysis.Select an existing density ratios modeling object from the list or click Create Modeling Object to create a new one.Click Edit to edit the selected modeling object.To filter a long list of modeling objects, click More Options to display options for searching and filtering the modeling objects.
Mach numbers	Lets you specify the Mach numbers to use in the flutter analysis.Select an existing Mach numbers modeling object from the list or click Create Modeling Object to create a new one.Click Edit to edit the selected modeling object.To filter a long list of modeling objects, click More Options to display options for searching and filtering the modeling objects.
Reduced Frequencies	Lets you specify the reduced frequencies to use in the flutter analysis.Select an existing reduced frequencies modeling object from the list or click Create Modeling Object to create a new one.Click Edit to edit the selected modeling object.To filter a long list of modeling objects, click More Options to display options for searching and filtering the modeling objects.
Aerodynamic Matrix Interpolation Method	Lets you specify the interpolation method that is used to obtain the reduced frequencies for the Mach numbers specified in the Aerodynamic Physical Data dialog box.LinearLinearly interpolate the reduced frequency versus Mach number data in the aerodynamic matrix.SurfaceInterpolate across reduced frequencies and Mach numbers.Note: When Flutter Analysis Method is set to PK Method or PK Method with no Looping, linear interpolation is used by default.
Number of Eigenvalues	Lets you specify the number of modes beginning with the first mode to output.
The following options appear when Flutter Analysis Method is set to PK Method.
Pressure Altitudes	Lets you specify the pressure altitudes to use in the flutter analysis.Select an existing pressure altitudes modeling object from the list or click Create Modeling Object to create a new one.Click Edit to edit the selected modeling object.To filter a long list of modeling objects, click More Options to display options for searching and filtering the modeling objects.
Density Ratios	Lets you specify the density ratios to use in the flutter analysis.Select an existing density ratios modeling object from the list or click Create Modeling Object to create a new one.Click Edit to edit the selected modeling object.To filter a long list of modeling objects, click More Options to display options for searching and filtering the modeling objects.
Mach numbers	Lets you specify the Mach numbers to use in the flutter analysis.Select an existing Mach numbers modeling object from the list or click Create Modeling Object to create a new one.Click Edit to edit the selected modeling object.To filter a long list of modeling objects, click More Options to display options for searching and filtering the modeling objects.
Velocities	Lets you specify the velocities to use in the flutter analysis.Select an existing velocities modeling object from the list or click Create Modeling Object to create a new one.Click Edit to edit the selected modeling object.To filter a long list of modeling objects, click More Options to display options for searching and filtering the modeling objects.
Number of Eigenvalues	Lets you specify the number of modes beginning with the first mode to output.
Convergence Parameter for K	Lets you specify the value (EPS) that the software uses in the following eigenvalue acceptance criteria:\left
The following options appear when Flutter Analysis Method is set to PK Method with no Looping.
Matched Points Strategy	Lets you specify a matched points strategy.No StrategySelect to specify the free flight conditions at which to perform the flutter analysis.Constant AltitudeSelect to specify the Mach numbers at which to perform the flutter analysis for a given altitude.Constant Mach NumberSelect to specify the altitudes at which to perform the flutter analysis for a given Mach number.
Number of Eigenvalues	Lets you specify the number of modes beginning with the first mode to output.
Convergence Parameter for K	Lets you specify the value (EPS) that the software uses in the following eigenvalue acceptance criteria:\left
Pressure Altitudes	Appears when Matched Points Strategy is set to No Strategy or Constant Mach Number.Lets you specify the pressure altitudes to use in the flutter analysis.Select an existing pressure altitudes modeling object from the list or click Create Modeling Object to create a new one.Click Edit to edit the selected modeling object.To filter a long list of modeling objects, click More Options to display options for searching and filtering the modeling objects.
Pressure Altitude	Appears when Matched Points Strategy is set to Constant Altitude.Lets you specify the pressure altitude to use in the flutter analysis.
Density Ratios	Appears when Matched Points Strategy is set to No Strategy or Constant Mach Number.Lets you specify the density ratios to use in the flutter analysis.Select an existing density ratios modeling object from the list or click Create Modeling Object to create a new one.Click Edit to edit the selected modeling object.To filter a long list of modeling objects, click More Options to display options for searching and filtering the modeling objects.
Calculate Density Ratios from Pressure Altitudes	Appears when Matched Points Strategy is set to No Strategy or Constant Mach Number.Calculates the density ratios from the pressure altitudes and Mach numbers that you specify using the International Standard Atmosphere (ISA).
Density Ratio	Appears when Matched Points Strategy is set to Constant Altitude.Lets you specify the density ratio to use in the flutter analysis.
Calculate Density Ratio from Pressure Altitude	Appears when Matched Points Strategy is set to Constant Altitude.Calculates the density ratio from the pressure altitude and Mach number that you specify using the International Standard Atmosphere (ISA).
Mach Numbers	Appears when Matched Points Strategy is set to No Strategy or Constant Altitude.Lets you specify the Mach numbers to use in the flutter analysis.Select an existing Mach numbers modeling object from the list or click Create Modeling Object to create a new one.Click Edit to edit the selected modeling object.To filter a long list of modeling objects, click More Options to display options for searching and filtering the modeling objects.
Mach Number	Appears when Matched Points Strategy is set to Constant Mach Number.Lets you specify the Mach number to use in the flutter analysis.
Velocities	Lets you specify the velocities to use in the flutter analysis.Select an existing velocities modeling object from the list or click Create Modeling Object to create a new one.Click Edit to edit the selected modeling object.To filter a long list of modeling objects, click More Options to display options for searching and filtering the modeling objects.
Calculate Velocities from Density Ratio(s) and Mach number(s)	Appears when Matched Points Strategy is set to Constant Altitude or Constant Mach Number.Calculates the velocities from the density ratios and Mach numbers that you specify using the International Standard Atmosphere (ISA).

Learn more

Aeroelastic flutter analysis (SOL 145)

Quick links

Command reference

Pre/Post video examples

Bulk Entry Descriptions

Simcenter 3D tutorials

Browse Simcenter 3D help by product area

Aerodynamic Flutter Data dialog box, Simcenter 3D 2021.1 Series

© 2020 Siemens

window.mainLanguage="en_US"

window.delivId=""

window.projectId=""

MathJax.Hub.Config({ TeX: { extensions: ["autoload-all.js"] }, tex2jax: { displayMath: [ ] }, "SVG": { scale: 125 } });