dytran案例6

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DYT101, Workshop 6, February 2008 Copyright 2008 MSC.Software Corporation
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Step 12. Initialize the Water Flow
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Initialize the water flow: a. Loads/BCs: Create / Int. Cond. Euler / Element Uniform b. Select Initial Values for Option. c. Enter water_velocity for New Set Name. d. Click on Input Data. e. Select water for Select Euler Material. f. Enter <-500 0 0> for Initial Material Veloc. g. Click OK. h. Click Apply.
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DYT101, Workshop 6, February 2008 Copyright 2008 MSC.Software Corporation
Step 11. Create the Water Region
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Create the water region: a. Loads/BCs: Create / Int. Cond. Euler / Element Uniform / Shape b. Enter water for New Set Name. c. Click on Select Application Region. d. Select FEM. e. Select the lower 4 layers of elements (Elm 1:180). f. Click Add. g. Click OK. h. Click Apply.
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Step 1. Files: Create a New Database
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Open a new database using the Dytran preference: a. Open File menu and click New. b. Enter water_jet for File name and click OK. c. Select MSC.Dytran for Analysis Code and click OK.
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DYT101, Workshop 6, February 2008 Copyright 2008 MSC.Software Corporation
Step 14. Definition of Eulerian Domain
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Definition of Eulerian domain: a. Loads/BCs: Create / Int. Cond. Euler / Element Uniform b. Select Region Definition for Option. c. Enter euler for New Set Name. d. Click on Input Data. e. Select euler for Existing PEULER1 Sets. f. Select void for Existing Shapes Sets. g. Enter 1 for Level Indicator. h. Click Add Row. i. Click OK.
end where we will define a Flow Boundary Condition to allow the fluid to flow in and out.
Water Out after Impact
Water Flows In Continuously
DYT101, Workshop 6, February 2008 Copyright 2008 MSC.Software Corporation
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Step 6. Create Mesh
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Mesh the beam by using Hex8 elements: a. Elements: Create / Mesh / Solid b. Select Hex for Elem Shape, Isomesh for Mesher, Hex8 for Topology. c. Enter Solid 1for Solid List d. Click Apply.
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DYT101, Workshop 6, February 2008 Copyright 2008 MSC.Software Corporation
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Hale Waihona Puke Step 3. Create Mesh Seeds
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Create a Mesh Seed of 15 x 10 x 3 on the solid: a. Elements: Create / Mesh Seed / Uniform b. Enter 15 for Number of Elements. c. Select all curves on the X axis. d. Click Apply. e. Enter 3 for Number of Elements. f. Select all curves on the Y axis. g. Click Apply. h. Enter 10 for Number of Elements. i. Select all curves on Z axis. j. Click Apply.
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Simulation = 100 Cycles Save output every 5 cycles Water Properties: Density = 1000 Kg/m3 Bulk Modulus = K =a1=2.2E9 N/m2 Jet Velocity = -500 m/s in X direction
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DYT101, Workshop 6, February 2008 Copyright 2008 MSC.Software Corporation WS6-10
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Step 8. Create Property for Solid
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Create a Property called euler for the Eulerian domain: a. Properties: Create / 3D / Eulerian Solid b. Enter euler for Property Set Name. c. Select Hydro(PEULER1) for Option(s). d. Click on Select Application Region. e. Enter Solid 1 for Select Members. f. Click Add. g. Click OK. h. Click Apply.
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DYT101, Workshop 6, February 2008 Copyright 2008 MSC.Software Corporation
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Step 2. Create Geometry
Create the Euler domain where water can flow: a. Geometry: Create / Solid / XYZ b. Enter <0.15, 0.04, 0.06> for Vector Coordinates List. c. Click Apply.
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DYT101, Workshop 6, February 2008 Copyright 2008 MSC.Software Corporation
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Step 9. Create a Boundary for Flow
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Create a flow boundary on the side where water enters the Eulerian domain: a. Loads/BCs: Create / Flow / Element Uniform b. Enter flow for New Set Name. c. Click on Input Data. d. Select Both for Flow Type. e. Select water for Select Material. f. Click OK. g. Click on Select Application Region. h. Select Geometry for Geometry Filter. i. Select Soild 1.2 for Select Solid Face and click Add. j. Click OK. k. Click Apply.
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DYT101, Workshop 6, February 2008 Copyright 2008 MSC.Software Corporation
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Step 5. Create Mesh Seeds (Cont.)
DYT101, Workshop 6, February 2008 Copyright 2008 MSC.Software Corporation
DYT101, Workshop 6, February 2008 Copyright 2008 MSC.Software Corporation
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Problem Description
● By default, the container is a closed box except at one
DYT101, Workshop 6, February 2008 Copyright 2008 MSC.Software Corporation
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Step 10. Create the Void Region
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Create the void region: a. Loads/BCs: Create / Int. Cond Euler / Element Uniform / Shape b. Enter void for New Set Name. c. Click on Input Data. d. Select Element for Shape. e. Click OK. f. Click on Select Application Region. g. Select FEM for Geometry Filter. h. Select the upper 6 layers of elements (Elm 181:450). i. Click Add. j. Click OK. k. Click Apply.
WORKSHOP 6
WATER JET IN A CONTAINER
DYT101, Workshop 6, February 2008 Copyright 2008 MSC.Software Corporation
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DYT101, Workshop 6, February 2008 Copyright 2008 MSC.Software Corporation
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DYT101, Workshop 6, February 2008 Copyright 2008 MSC.Software Corporation
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Step 7. Create Material for Water
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Define material properties for the water: a. Materials: Create / Isotropic / Manual Input b. Enter water for Material Name. c. Click on Input Properties. d. Constitutive Model: LinFluid(DMAT) Valid For: Eluerian Solid (Hydro) e. Enter 1000 for Density, 2.2e9 for Bulk Modulus. f. Click OK. g. Click Apply.