ANSYS, Inc. is an engineering simulation software provider founded by software engineer John Swanson. It develops general-purpose finite element analysis and computational fluid dynamics software. While ANSYS has developed a range of computer-aided engineering (CAE) products, it is perhaps best known for its ANSYS Mechanical and ANSYS Multiphysics products. ANSYS is a cad exportable software which can exchange data with: Pro/Engineer
NASTRAN
AutoCAD
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ANSYS is an analysis tools incorporating pre-processing (geometry creation, meshing), solver and postprocessing modules in a graphical user interface.
ANSYS technology incorporates both structural and material non-linearities. ANSYS Multiphysics software includes solvers for thermal, structural, CFD, electromagnetics, and acoustics and can sometimes couple these separate physics together in order to address multidisciplinary applications. ANSYS software can also be used in civil engineering, electrical engineering, physics and chemistry.
The pre-processing contains two parts:
1.GEOMETRY CREATION: The programme provides 2 ways of building the model: The 1st way is from top to the bottom:The users will define the superlative degree graphic element ,like balls, prism.They are called modules.Then the programme will define the keypoints,lines and surfaces automaticly. The 2nd way is from the bottom to the top:The users will define the lowest degree graphic element then build the model.That is the users will define the keypoints,then lines,surfaces then the model. No matters which way the users ues to build the model,they are under the rules ofBoolean operation,like additive, substruction, intersection, segmentation, cementation, overlapping.
The 2nd part of the pro-processing of Ansys 2 Meshing Meshing is an integral part of the computer-aided engineering (CAE) simulation process. The mesh influences the accuracy, convergence and speed of the solution. Furthermore, the time it takes to create a mesh model is often a significant portion of the time it takes to get results from a CAE solution. Therefore, the better and more automated the meshing tools, the better the solution. From easy, automatic meshing, to a highly crafted mesh, ANSYS, provides the ultimate solution. Powerful automation capabilities ease the initial meshing of a new geometry by keying off physics preferences and using smart defaults so that a mesh can be obtained upon first try. Additionally, users are able to update immediately to a parameter change, making the handoff from CAD to CAE seamless and aiding in up-front design. Once the best design is found, meshing technologies from ANSYS provide the flexibility to produce meshes that range in complexity from a pure hex mesh to highly detailed hybrid meshes; users can put the right mesh in the right place and ensure that a simulation will accurately validate the physical model.
ANSYS provides a complete set of sparse direct and iterative solver technology for both serial and parallel computing. Large scale computing is achieved via parallel processing, interative and domain-based solvers. It also provides the kinds analysis of below: 1.
Structural Static Analysis
2. Structural Dynamics Analysis 3. Nonlinear Analysis 4. Kinetic Analysis 5. Thermo Analysis 6. Electromagnetic Analysis 7.
Fluid Dynamics Analysis
8. Sound Field Analysis 9. Piezoelectric Analysis
The post-processing part will output the result of analysis in a graphically display.Using the different lines and colors to show the differences on the same model.
1. Start ANSYS and assign a job name to the project. Run Interactive -> set working directory and jobname. 2. 2. Preferences -> Thermal will show -> OK 3. 3. A quadrant of a section through the cylinder is created using ANSYS area creation tools. 4. 4. Preprocessor -> Element Type -> Add/Edit/Delete -> Add -> Solid 8 node 77 -> OK -> Options -> K3 Axisymmetric -> OK 5. 5. Preprocessor -> Material Props -> Isotropic -> Material Number 1 -> OK EX = 3.E7 (psi) DENS = 7.36E-4 (lb sec^2/in^4) ALPHAX = 6.5E-6 PRXY = 0.3 KXX = 0.69 (BTU/hr-in-F) 6. Mesh the area using methods discussed in previous examples. 7. 7. Preprocessor -> Loads -> Apply -> Temperatures -> Nodes Select the nodes on the interior and set the temperature to 75. Preprocessor -> Loads -> Apply -> Convection -> Lines 8. 8. Preprocessor Select the lines defining the outer surface and set the coefficient to 0.56 and the fluid temp to 40. 9. 9. Preprocessor -> Loads -> Apply -> Heat Flux -> Lines Select the vertical and horizontal lines of symmetry and set the heat flux to zero.
10. 10. Solution -> Solve current LS 11. General Postprocessor -> Plot Results -> Nodal Solution Solution -> Temperature 12. 12. File -> Save Jobname.db 13. 13. Preprocessor -> Loads -> Delete -> Delete All -> Delete All Opts. The temperature on the interior is 75 F and on the outside wall it is found to be 43
14. 14. Preferences -> Structural will show, Thermal will NOT show. 15. 15. Preprocessor -> Element Type -> Switch Element Type -> OK (This changes the element to structural) 16. 16. Preprocessor -> Loads -> Apply -> Displacements -> Nodes (Fix nodes on vertical and horizontal lines of symmetry from crossing the lines of symmetry.) 17. 17. Preprocessor -> Loads -> Apply -> Temperature -> From Thermal Analysis Analysis Select Jobname.RTH (If it isn't present, look for the default 'file.RTH' in the root directory) 18. 18. Solution -> Solve Current LS 19. 19. General Postprocessor -> Plot Results -> Element Solution - von Mises Stress