The selection of the appropriate convergence criterion is a tradeoff between accuracy and computer run time. The number of refinements required for the solution to converge, if convergence is achieved, or the number of. Dec 19, 20 for the first time, in solidworks simulation 2014, you can view the contact pressure plots in linear and nonlinear 2d simplification studies contact pressure is developed in areas where two bodies come into contact during the analysis and no penetration contact is defined. Rightclick the results folder and select define adaptive convergence graph. In finite element analysis fea the results are an approximation. Finite element analysis convergence and mesh independence. Engineering analysis with solidworks simulation 2015 8 engineering analysis with solidworks simulation is an introductory text.
Fea and convergence basics in a typical designengineering project one may be asked to predict stress, deflections, natural frequencies or temperature distribution in a part or assembly. If youre like most engineers, the answer is, and probably should be, yes. Steady state,transient, and conjugate heat transfer solutions are standard with flow simulation. For any simulation, the time spent on meshing is important to the user, said derbal. The way a user becomes comfortable with the stress, strain, and deflection calculated by an analysis depends on convergence. Welcome back to the solidworks simulation stepup series. The intention of the convergence check is to plot the maximum global value, not one specific node. In the finite element method, you are trying to figure out a set of values which makes a set of equations true. Monitoring integrated quantities such as force, drag, or average temperature can help the user judge when his or her analysis has reached this point. In this course, solidworks simulation linear static part analysis, you will be guided. The results shall be plotted to graphically verify convergence. Simulation solutions for solidworks provide an easytouse portfolio of analysis tools for predicting a products realworld physical behavior by virtually testing cad models. What my fea professor never taught me engineer jau.
The standard mesher uses the voronoidelaunay meshing. However, the particular convergence plot that willem is inquiring about when using the ffeplus solver is actually of no use to users, and thats not coming from me, thats coming directly. The solution convergence criterion should be one of the default user inputs on the first control card that is always read. Nov 15, 2018 how to export a 3d results plot from comsol multiphysics as of comsol multiphysics version 5. Accessing the tutorials to start the online tutorials, click help, solidworks tutorials. Solidworks 2016 sp05 to disable web help from within solidworks and use local help instead, click help use solidworks web help. Again remember that i named my sensors by their distance from the outside of the grid, meaning the bigger the number the closer to the singularity.
As you get more and more in depth with your solidworks simulation studies you need to ensure that you are receiving accurate analysis results, here is some information regarding mesh convergence and creating accurate meshes for your studies. So how to conduct the convergence test or mesh refinement study in finite element. The focus is more on understanding finite element analysis than presenting all software capabilities. How to export and share your 3d result plots as gltf files. Lotfi derbal, product portfolio manager for solidworks flow simulation at dassault systemes, notes that perhaps the most important improvement to the software is its meshing enhancements. The selection of the appropriate convergence criterion is a tradeoff between accuracy. The design may have to be modified or optimized based on these predictions. Jan 08, 2015 one of the key technologies in solidworks flow simulation is a concept in the software called goals. Operating later from concord, massachusetts, solidworks released its first product solidworks 95, in november 1995. However, the particular convergence plot that willem is inquiring about when using the ffeplus solver is actually of no use to users, and thats not coming from me, thats coming directly from the solidworks knowledge base. In terms of the mesh, convergence refers to the process where results hone.
The problem is my understanding on the number of iterations. The x axis of this plot shall show some indication of mesh density in the area of interest number of elements on a curve, elements per unit. Search generating convergence graphs in the solidworks knowledge base. Mesh convergence determines how many elements are required in a model to ensure that the results of an analysis are not affected by changing the size of the mesh. Solidworks flow simulation software is an established computational fluid dynamics cfd analysis tool. Convergence graph propertymanager 2017 solidworks help. The comsol software exports glbfiles that can be used to easily open and manipulate the geometry in other tools. My hope in the post is to attempt to clear up any questions that you may have about goals by breaking it down into 3 sections. The software discussed in this document is furnished under a license and may be used or copied only in accordance with the terms of the license. Jun 09, 2017 another application of the term mesh convergence is a little more practical, and that is how the solution with respect to a relevant variable of interest changes with increasing mesh size. Plotworks software is available in three configurations to meet your needs. The primary criteria for determining convergence is that the change of each degree.
Finding accurate stress results with singularities part 1. The simplest is known as the trend tracker, available in solidworks simulation professional. In this course, solidworks simulation linear static part analysis, you will be guided through each of these steps to ensure accuracy from start to finish. Hi victor, it is difficult to provide a general answer to your question, but in my experience when the convergence plot shows as figure 2 slope having large change between solution steps, or a. The convergence graph propertymanager sets the components to be plotted after a successful run of a static study using the padaptive method you can select any number of options. Steady state, transient, and conjugate heat transfer solutions are standard with flow simulation.
Strictly speaking, there is no rigorous way of knowing for sure that the mesh you have chosen yields a good result, but the following techniques are some of the most popular ways that i have come across. The number of refinements required for the solution to converge, if convergence is achieved, or the number of solution steps requested for the required refinements. How to export and share your 3d result plots as gltf. Flow simulation offers users internal and external analysis of fluid systems. Solidworks simulation convergence checking 1 youtube. The convergence graph propertymanager sets the components to be plotted after a successful run of a static study using the padaptive method. Gsc lends our expertise in 3d engineering software and hardware solutions to help your business grow. This handy utility allows you to set a baseline result, and then track changes in your results as you adjust the parameters of a study such as refining a mesh. Most times you probably arent looking at a problem which has an exact solution for. System response stress, deformation will converge to a repeatable solution with decreasing element size. Divergence and convergence for simulation results computer. Apr 24, 2017 this feature is not available right now. To complete a linear static analysis of a part in solidworks simulation, many steps need to be followed.
A convergence test is always needed to be conducted to determine the size of elements in finite element modeling. Find out more about simulation licenses here and contact us today. Solution convergence an overview sciencedirect topics. What you need to know for solidworks flow simulation in. What is the concept of convergence criteria in ansys. Over the next few weeks, well be discussing all things solidworks simulation. Once the oscillations are less than the convergence criterion the goal becomes. Accuracy is put in context and the three methods of manualh and adaptive h and p methods are explained.
Accuracy is put in context and the three methods of manualh and. One rule for mesh convergence study is that the ratio of element sizes has to be a minimum value of 1. This type of plot can be found in the stress plot property. The default plots in the results folder depend on the study type and the options you set on the default options tab of the options dialog box. Convergence plot inventor autodesk knowledge network. With this plot we can also see the trend of how the stress decreases as it moves away from the singularity. Engineers and designers have been using finite element analysis fea software for over 70 years 1 to simulate physical phenomena mechanics, dynamics, thermal, fluids, electricity. Solidworks is the leading supplier of 3d cad product design engineering software. The standard mesh has been used from the beginning of solidworks simulation.
Flow simulation works seamlessly inside of solidworks and offers a straight forward, easy to use interface. Apr, 20 what my fea professor never taught me engineers and designers have been using finite element analysis fea software for over 70 years 1 to simulate physical phenomena mechanics, dynamics, thermal, fluids, electricity, magnetism etc. Strictly speaking, there is no rigorous way of knowing for sure that the mesh you have chosen yields a good result, but the following techniques are some of the most popular ways that i have come across for building significant confidence that your mesh is adequate and reliable. As you get more and more in depth with your solidworks simulation studies you need to ensure that you are. Unlike manufacturers software that work on their hardware, plotworks prime is the only independent service that ensures business continuity, empowers you to control your production environment by working with all marketleading legacy, current and future devices. The software generates a results folder in the simulation study tree after running a study successfully. Run button and walk away while the software does all the refinement for you. Jul 03, 2017 figure 11 is a plot with a better resolution for the sensors that experience convergence. Aug 26, 2016 solidworks flow simulation software is an established computational fluid dynamics cfd analysis tool.
Thankfully, solidworks simulation has several tools ready to help. The vertical axis is normalized to unity if multiple graphs are selected. I see you measured equivalent total strain at a node. Compare your results to several of your peers and comment on significance. How to conduct the convergence test or mesh refinement study. Tools within the program that can give some indication of the level of. Today, the north america solidworks simulation experts will discuss accuracy and convergence. Unlike manufacturers software that work on their hardware, plotworks prime is the only independent service that ensures. The primary criteria for determining convergence is that the change of each degree of freedom is minimized over a large range of iterations.
The convergence plot command displays the plot within a dialog box. What you need to know for solidworks flow simulation in 2016. Solidworks 3d mechanical cad software is protected by u. After the analysis is finished, display the convergence information by clicking the convergence plot tab on the output bar. Generating convergence graphs 2017 solidworks help.
Fea enables simulation and is especially useful for structural and thermal analysis typically, engineers use simulation software, such as creo simulate and its extensions, to perform various types of. Have you ever sat at your desk, digesting the results of your most recent simulation study, and wondered. However, the following advice will make this selection easier for the user. A recommended variation of 5% stress between runs usually indicates good stress convergence. You can use energy norm error plots to pinpoint regions that are not converged. Using adaptivity for automatic mesh convergence by joel higgins, javelin technologies inc. Where to see that graph, how to see the results of 5 different mesh type and 5 different studies in one graph, please explain that part. For the first time, in solidworks simulation 2014, you can view the contact pressure plots in linear and nonlinear 2d simplification studies contact pressure is developed in areas where. Since there is a tradeoff between mesh size and solution time, one aims for a mesh which is good enough. Strictly speaking, there is no rigorous way of knowing for sure that the mesh you have chosen yields a good result, but the following techniques are some of the most popular ways that i have come across for building significant confidence that its adequate and reliable. One of the key technologies in solidworks flow simulation is a concept in the software called goals.
Aug 10, 2016 welcome back to the solidworks simulation stepup series. Engineering analysis with solidworks simulation 2015. All warranties given by ds solidworks as to the software and documentation are set forth in the license. Dec 23, 2015 meshing is key to solidworks flow simulation 2016. Initially based in waltham, massachusetts, united states, hirschtick recruited a team of engineers with the goal of building 3d cad software that was easytouse, affordable, and available on the windows desktop. Im using solidworks to do convection heat transfer in the microcomputer.
The solidworks simulation automatic convergence tools are powerful and intuitive tools that allow users to streamline their project and have more control over mesh areas. In the propertymanager, select the components that you want to graph and click. All warranties given by ds solidworks as to the software. Create simulation adaptive meshing convergence graph. How to conduct the convergence test or mesh refinement. Solidworks as to the software and documentation are set forth in the. The convergence graph of all checked quantities is displayed. The way a user becomes comfortable with the stress, strain, and deflection calculated. Please note that the values p1p5 do not represent principal stresses. Solidworks currently markets several versions of the solidworks cad software in addition to edrawings, a collaboration tool, and draftsight, a 2d cad product. My hope in the post is to attempt to clear up any questions that you may have about.
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