Function
- Check the Buckling Mode Shapes and Critical Buckling Load Factors of a model.
Call
From the Main Menu select [Results] tab > [Type : Analysis Result] > [Dynamic] group > [Mode Shape] > [Buckling Mode Shapes]
Input
Load Cases (Mode Numbers)
Select the desired mode numbers.
Press the Multi-Modes Button and select a desired option to simultaneously verify several mode shapes.
Components
Select a desired mode component among the following:
Md-X : Buckling mode component in GCS X-direction
Md-Y : Buckling mode component in GCS Y-direction
Md-Z : Buckling mode component in GCS Z-direction
Md-XY :
Md-YZ :
Md-XZ :
Md-XYZ :
Type of Display
Assign the type of display as follows:
Md.Shp.
Display the buckling mode shapes.
The ... Button
Mode Shape Scale Factor : Control the Scale Factor for buckling mode shapes.
Cubic Interpolation : Display the elements by cubically interpolating the mode shapes (including rotation angle) of each node.
Cubic Interpolation Factor : Factor to be applied for cubic interpolation. It affects the curvature of elements.
Undeformed
Display additionally the model shape in the buckling mode shapes.
The representation of the model shape can be controlled in Display Option.
Values
Display the component of a buckling mode in numerical values.
The font and color of the numbers can be controlled in Display Option.
The ... Button
Decimal Points : Assign decimal points for the displayed numbers
Exp. : Express as exponential
Min & Max : Display the maximum and minimum values
Abs Max : Display the absolute maximum value
Max : Display only the maximum value
Min : Display only the minimum value
Limit Scale (%) : Set the screen display limit for buckling mode shapes relative to the selected maximum or minimum value
Set Orientation : Display orientation of numerical values
Note
The default Decimal Points can be controlled in "Preferences".
Set Orientation = 0 horizontally displays the numerical values to the right of nodes or elements.
The orientation angle represents the counter-clockwise direction, which may be used to enhance the readability of the numbers.
Legend
Display various references related to analysis results to the right or left of the working window.
The ... Button
Legend Position : Position of the legend in the display window
Animate
Dynamically simulate the buckling modes.
The ... Button
Click the Apply Button then click Record to the right of the Animation control board at the bottom of the working window.
Animation Mode : Select the type of animation for analysis results.
Animate Contour : Option to change the color of the contour representing the transition according to the magnitudes of variation
Repeat Half/Full Cycle : Select the repetition cycle for the dynamic representation of the transition
Note
Select 'Half Cycle' for the transient shapes of a structure and 'Full Cycle' for dynamically simulating vibration modes or buckling modes.
AVI Options : Enter the options required to produce the animation window.
Bits per Pixel : Number of bits per pixel to create the default window for animation
The Compressor... Button : Assign the method of the compressing image data
Frames per Half Cycle (3~300) : Number of frames to simulate a 'Half Cycle'
Frames per Second (5~60) : Number of frames per second to present dynamic simulation
Construction Stage Option : Not Supported in Bucking Mode Analysis
Contour
Display the displacement of the model in contour.
The ... Button
Ranges: Define the contour ranges.
The Customize Range... Button : Assign the color distribution range of contour. Using the function, specific colors for specific ranges can be assigned.
Note
Contour Range Max/Min values can be larger than the max/min output values. If the Contour Range values exceed the output values, they are entered at Rank 0 and Rank 11.
Number of Colors : Assign the number of colors to be included in the contour (select among 6, 12, 18, 24 colors)
Colors : Assign or control the colors of the displacement contour.
Color Table : Assign the type of Colors.
The Customize Color Table Button : Control the colors by zones in the contour.
Reverse Contour : Check on to reverse the sequence of color variation in the contour.
Contour Line : Assign the boundary line color of the contour
Element Edge : Assign the color of element edges while displaying the contour
Contour Options : Specify options for contour representation
Contour Fill
Gradient Fill : Display color gradient (shading) in the contour.
Draw Contour Lines : Display color boundaries in the contour.
Draw Contour Line Only : Display only the colored boundaries of the contour.
Mono line : Display the boundaries of the contour in a mono color.
Contour Annotation : Legend or annotation signifying the ranges of the contour is displayed.
Spacing : Display the spacing for the legnd or annotation.
Coarse Contour (faster) (for large plate or solid model) : Represent a simplified contour for a large model using plate or solid elements in order to reduce the time required to represent a complete contour.
Extrude : Where plate elements or solid elements along a cutting plane are represented in contour, a three dimensional contour is created. The positive direction of the analysis results is oriented in the z-axis direction of the local element coordinate system.
The option is not concurrently applicable with the Deformed Shape option. Similarly, the option cannot be concurrently applied to the cases where the Hidden option is used to display plate element thicknesses or the Both option is used to represent Top & Bottom member forces (stresses).