workshop 9-1 nas101 workshops copyright 2001 msc.software corporation workshop 9 buckling...
DESCRIPTION
Workshop 9-3 NAS101 Workshops Copyright 2001 MSC.Software Corporation Workshop 9 -- Boundary Conditions Simply supported Supported on rollers Supported in the Vertical DirectionTRANSCRIPT
Workshop 9-1NAS101 WorkshopsCopyright 2001 MSC.Software Corporation
WORKSHOP 9
Buckling Analysis of Plate
Workshop 9-2NAS101 WorkshopsCopyright 2001 MSC.Software Corporation
Workshop 9 (cont.)
1.Model descriptiona.The model dimension is 20 inch by 8 inchb.The following boundary conditions are applied to the model:
Pin at the left end Rollers at the right end Zero vertical deflections at top and bottom edges
c.Apply 100psi compressive loads at the right edge Total loads at right edge = (100) (8) (.01) = 8
• Apply 1 lb each at grid points 11 and 55• Apply 2 lbs each at grid points 22, 33, and 44
Workshop 9-3NAS101 WorkshopsCopyright 2001 MSC.Software Corporation
Workshop 9 -- Boundary Conditions
Simply supportedSimply supported
Supported on rollersSupported on rollersSupported in the Supported in the Vertical DirectionVertical Direction
Supported in the Supported in the Vertical DirectionVertical Direction
Workshop 9-4NAS101 WorkshopsCopyright 2001 MSC.Software Corporation
Workshop 9 -- Applied Loads
22
2222
11
11
Workshop 9-5NAS101 WorkshopsCopyright 2001 MSC.Software Corporation
Create the first surface
a. Create / Surface / XYZ.
b. Enter <20 8 0> for the Vector Coordinate List.
c. Use [0 0 0] as the Origin Coordinate List.
d. Click Apply.
Step 1. Create Geometry: Create/Surface/XYZ
Workshop 9-6NAS101 WorkshopsCopyright 2001 MSC.Software Corporation
Create mesh seeds that will be used to guide the mesh.
a. Create / Mesh Seed / Uniform.
b. Input 4 in the Number of Elements.
c. Select Surface 1.1 as the Curve List.
d. Click Apply.
e. Input 10 in the Number of Elements.
f. Select Surface 1.4 as the Curve List.
g. Click Apply.
Step 2. Finite Element: Create /Mesh Seed/Uniform
Surface 1.1
Surface 1.4
Workshop 9-7NAS101 WorkshopsCopyright 2001 MSC.Software Corporation
Step 2A. Finite Element: Create /Mesh/Surface
Create surface mesh based on the mesh seeds assigned in the previous steps.
a. Create / Mesh / Surface.b. Select Quad as the Elem
Shape.c. Select IsoMesh as the Mesher.d. Enter Surface 1 for Surface
List.e. Click Apply.
Workshop 9-8NAS101 WorkshopsCopyright 2001 MSC.Software Corporation
Step 3. Material: Create /Isotropic/ Manual Input
Create the material aluminum.a. Create / Isotropic / Manual
Input.b. Type in alum for the Material
Name.c. Click on the Input Properties
button to bring up the Input Option window.
d. Enter 2.9E7 for the Elastic Modulus , and 0.3 for Poisson Ratio
e. Click OK to return to the main material menu.
f. Click Apply.
Workshop 9-9NAS101 WorkshopsCopyright 2001 MSC.Software Corporation
Step 4. Element Properties: Create /2D/ Shell
Create the element properties.a. Create / 2D / Shell.b. Enter plate as the Property
Set Name.c. Click on the Input Properties
button.d. Click on the alum in the
Material field on the bottom section of the Input Properties window.
e. Enter 0.01 as the thickness for the plate.
f. Click OK.g. Select Surface 1 for the
Application Regionh. Click Add.i. Click Apply.
Workshop 9-10NAS101 WorkshopsCopyright 2001 MSC.Software Corporation
Step 5. Loads/BCs: Create/ Displacement/Nodal
Create the boundary condition for the model.
a. Create / Displacement / Nodal.
b. Enter simply_supported_left as the New Set Name.
c. Click on the Input Data.d. Enter <0 0 0> for the
Translation field.e. Click OK.f. Click on Select
Application Region.g. Select FEM as the
geometry filter..h. Select Node
1,12,23,34,45 for the Application Region.These are nodes along the left edge of the rectangle.
i. Click Add.j. Click OK.k. Click Apply.
Workshop 9-11NAS101 WorkshopsCopyright 2001 MSC.Software Corporation
Step 5A.(cont.) Loads/BCs: Create Boundary Conditions
After you have completed previous steps,then you see the constraints on the model as shown below:
Workshop 9-12NAS101 WorkshopsCopyright 2001 MSC.Software Corporation
Step 6. Loads/BCs: Create/ Displacement/Nodal
Create the boundary condition for the model.
a. Create / Displacement / Nodal.
b. Enter support_vertical_bottom as the New Set Name.
c. Click on the Input Data.d. Enter <, , 0> for the
Translation field.e. Click OK.f. Click on Select
Application Region.g. Select FEM as the
geometry filter..h. Select Node 1 through
11 for the Application Region.These are nodes on the bottom
i. Click Add.j. Click OK.k. Click Apply.
Workshop 9-13NAS101 WorkshopsCopyright 2001 MSC.Software Corporation
Step 6A.(cont.) Loads/BCs: Create Boundary Conditions
After you have completed previous steps,then you see the constraints on the model as shown below:
Workshop 9-14NAS101 WorkshopsCopyright 2001 MSC.Software Corporation
Step 7. Loads/BCs: Create/ Displacement/Nodal
Create the boundary condition for the model.
a. Create / Displacement / Nodal.
b. Enter support_vertical_top as the New Set Name.
c. Click on the Input Data.d. Enter <, , 0> for the
Translation field.e. Click OK.f. Click on Select
Application Region.g. Select FEM as the
geometry filter..h. Select Node 45 through
55 for the Application Region.These are nodes on the top edge of the rectangle.
i. Click Add.j. Click OK.k. Click Apply.
Workshop 9-15NAS101 WorkshopsCopyright 2001 MSC.Software Corporation
Step 7A.(cont.) Loads/BCs: Create Boundary Conditions
After you have completed previous steps,then you see the constraints on the model as shown below:
Workshop 9-16NAS101 WorkshopsCopyright 2001 MSC.Software Corporation
Step 8. Loads/BCs: Create/ Displacement/Nodal
Create the boundary condition for the model.
a. Create / Displacement / Nodal.
b. Enter supported_rollers_right as the New Set Name.
c. Click on the Input Data.d. Enter <, 0, 0> for the
Translation field.e. Click OK.f. Click on Select
Application Region.g. Select FEM as the
geometry filter..h. Select Node
11,22,33,44,55 for the Application Region.These are nodes on the right edge of the rectangle.
i. Click Add.j. Click OK.k. Click Apply.
Workshop 9-17NAS101 WorkshopsCopyright 2001 MSC.Software Corporation
Step 8A.(cont.) Loads/BCs: Create Boundary Conditions
After you have completed previous steps,then you see the constraints on the model as shown below:
Workshop 9-18NAS101 WorkshopsCopyright 2001 MSC.Software Corporation
Step 9. Loads/BCs: Create/Force /Nodal
Apply distributed load to the model.
a. Create / Force / Nodalb. Enter edge as the New
Set Name.c. Click on the Input Data
button.d. Enter <-1 0 0> in the Force
field.e. Click OK.f. Click on Select
Application Region button.
g. Select FEM as the Geometry Filter.
h. Select Node 11,55 for the Application Region.
i. Click Add, and OK.j. Click Apply.
Workshop 9-19NAS101 WorkshopsCopyright 2001 MSC.Software Corporation
Step 9A.(cont.) Loads/BCs: Loading on the right edge
After you have completed previous steps,then you see the load on the model as shown below:
Workshop 9-20NAS101 WorkshopsCopyright 2001 MSC.Software Corporation
Step 10. Loads/BCs: Create/Force /Nodal
Apply distributed load to the model.
a. Create / Force / Nodalb. Enter middle as the New
Set Name.c. Click on the Input Data
button.d. Enter <-2 0 0> in the Force
field.e. Click OK.f. Click on Select
Application Region button.
g. Select FEM as the Geometry Filter.
h. Select Node 22,33,44 for the Application Region.
i. Click Add, and OK.j. Click Apply.
Workshop 9-21NAS101 WorkshopsCopyright 2001 MSC.Software Corporation
Step 10A.(cont.) Loads/BCs: All the loadings plus constraints
After you have completed previous steps,then you see the loads and constraints on the model as shown below:
Workshop 9-22NAS101 WorkshopsCopyright 2001 MSC.Software Corporation
Step 11. Analysis: Analyze/ Entire Model/Full Run
Submit the model for analysis.a. Analyze / Entire Model / Full
Run.b. Click on the Solution Type.c. Select BUCKLING as the
Solution Type.d. Click OK.e. Click on the Solution
Parametersf. The menu called Solution
Parameters is shown on next page
Workshop 9-23NAS101 WorkshopsCopyright 2001 MSC.Software Corporation
Step 12. Analysis: Analyze/ Entire Model/Full Run
a. Uncheck the box label Large
Displacementsb. Click on Eigenvalue Extraction
button.c. Extraction Method is Lanczos
Put in number 5 for Number of Desired Roots.
d. Click OK.e. Click OKf. Click OKg. Click APPLY
Workshop 9-24NAS101 WorkshopsCopyright 2001 MSC.Software Corporation
Step 13. Analysis: Attach XDB/ Result Entities/ Local
Attach the XDB result file.a. Attach XDB / Result Entities /
Local.b. Click on Select Result File.c. Select the file called w9.xdbd. Click OK.e. Click Apply.
Workshop 9-25NAS101 WorkshopsCopyright 2001 MSC.Software Corporation
Step 14. Results: Create/Quick Plot
Create a Quick Plot of the results.a. Create / Quick Plot.b. Select SC2 result case.c. Select Eigenvectors, Translational for both the Fringe results and
for the Deformation d. Click APPLY.