Femap梁板单元模型实例操作BeamPlateModel

Introduction

In this example we will read in simplified wireframe geometry of the following assembly.

The top plate will be modeled with plate elements, and the underlying support beams will be modeled with beam elements.

The steps you will follow in this exercise are:

•Import a Femap Neutral File containing wireframe geometry.

•Create a Material and the Plate and Beam Properties for the model

•Create the surfaces for the model

•Mesh the surfaces

•Constrain the plate

•Add the support beams

•Apply a load to the plates

•Analyze the model and review the results

Step 1:Import a Femap Neutral File

Import the geometry from a Femap Neutral file.

•Select the File, Import, Femap Neutral command

•Select the file, ex9 –Plate Geometry.neu,located in your training class’ Geometry folder. Click OK in the

Neutral File Read Options dialog box.

This geometry will be meshed with elements, whose

properties and materials we will now define.

•Save your model in the Exercises folder as ex9-BeamPlate.modfem.

Step 2:Create a Material and the Plate and Beam

Properties for the model

Create the Material

•Select the Model, Material command or right-click on the Materials object in the Model Info window and

select New.

•In the Define Material –ISOTROPIC dialog box, click Load.

•Select the material, Aluminum 7075 Heat Treated

(T6) Wrought in the Select from Library dialog box.•After selecting the Aluminum 7075 Heat Treated (T6)

Wrought material, click OK to create the material.•Click Cancel or use the esc key to exit the command.

Note :mat_eng_in-lbf-If your default library is not set to

psi-degF-BTU.esp, you can easily change the

library to this by clicking the Choose Library

button in the Select from Library dialog box.

The library referenced above is in both the

Libraries and Settings folder under you class

files folder or in the main Femap installation

folder.

•To create the plate property, right-click the Properties object in the Model Info window and select New.

•In the Define Property –PLATE Element Type dialog box select the material previously created from the Material drop-down list.

•Enter the Title as 2.5 mm Thick Plate.

•Enter the Thickness as 2.5.

•Click OK to continue.

Create the a Beam property.

•FEMAP will automatically prompt you for the next property. To change to a beam property, click the

Elem/Property Type button, and change the

Elem/Property Type to Beam.

•FEMAP now displays the Define Element -BEAM Element Type dialog box.

•Set the Title to 25 X 12.5 X 15 X 2.5 C-Channel

•Set the Material to the aluminum material created earlier.

•Instead of entering the beam properties manually, click the Shape button to enter the cross-section data directly.